Foldable electronic device

Abstract

The application discloses a foldable electronic device, which comprises a first device body, a second device body, a first antenna, a second antenna and a first parasitic radiator. The first antenna comprises a first antenna radiator, the second antenna comprises a second antenna radiator, at least part of the first antenna radiator and at least part of the second antenna radiator extend along a direction parallel to a rotation shaft, and when the foldable electronic device is in a folded state, at least part of the first antenna radiator overlaps with the corresponding first parasitic radiator in the thickness direction of the foldable electronic device, so that the first antenna radiator is coupled with the first parasitic radiator. The application can improve the envelope correlation coefficient and efficiency of the first antenna and the second antenna in the folded state.

Description

Technical Field

[0001] This application relates to the field of antennas, and more particularly to a foldable electronic device. Background Technology

[0002] With the advent of the smartphone era, large screens have become a major trend in smartphone development. Foldable phones combine portability with the visual experience offered by large screens, making foldable smartphones a hot topic. Major smartphone manufacturers have already released related foldable smartphones.

[0003] Foldable smartphones typically operate in two states: unfolded and folded. In the unfolded state, they resemble typical candybar smartphones or tablets. However, in the folded state, whether folded vertically or horizontally, the floor area of ​​the foldable smartphone is reduced by half compared to the unfolded state. This alters the environment around the antennas, potentially leading to a deterioration in the ECC (Envelope Correlation Coefficient) and antenna efficiency of closely spaced antennas operating at the same frequency, and ultimately, a degradation in the overall transmit / receive performance of the antenna system. Therefore, achieving low envelope correlation and high antenna efficiency in the folded state is a significant challenge and a major challenge in foldable smartphone antenna design. Summary of the Invention

[0004] This application provides a foldable electronic device that overcomes the pain points and difficulties of existing foldable electronic device antenna designs. It enables a pair of antennas to work independently even when they are close together in the folded state, with a low envelope correlation coefficient (ECC). Both antennas in the pair have high antenna efficiency, thus improving the antenna performance of the foldable electronic device in the folded state.

[0005] This application provides a foldable electronic device, including a first device body and a second device body, which are connected by a hinge. The first device body has a first conductive frame, and the second device body has a second conductive frame. The foldable electronic device also includes:

[0006] A first antenna and a second antenna, the first antenna including a first antenna radiator, the second antenna including a second antenna radiator, the first antenna radiator and the second antenna radiator being located in the main body of the first device, wherein the operating frequency band of the first antenna and the operating frequency band of the second antenna are the same or partially overlap;

[0007] The first parasitic radiator is located in the main body of the second equipment, and is grounded through the main body of the second equipment.

[0008] The first antenna radiator and the second antenna radiator are formed by the first conductive frame of the first device body, and the first parasitic radiator is formed by the second conductive frame of the second device body; at least a portion of the first antenna radiator and at least a portion of the second antenna radiator extend in a direction parallel to the axis of rotation, and when the foldable electronic device is in a folded state, at least a portion of the first antenna radiator and the first parasitic radiator overlap in the thickness direction of the foldable electronic device, such that the first antenna radiator and the first parasitic radiator are coupled.

[0009] In this solution, by setting a first parasitic radiator that corresponds to and at least partially overlaps with the first antenna radiator in the folded state, the first antenna and the second antenna can still work independently and normally when the foldable electronic device is in the folded state, even when the two antennas of the pair are close to each other, and the two antennas of the pair have a low envelope correlation coefficient (i.e., ECC). Moreover, both antennas of the pair have high antenna efficiency, which improves the antenna performance of the foldable electronic device in the folded state.

[0010] In some embodiments, the foldable electronic device further includes a second parasitic radiator disposed corresponding to the position of the second antenna radiator. The second parasitic radiator is located in the second device body and formed by a second conductive frame of the second device body. When the foldable electronic device is in a folded state, at least a portion of the second antenna radiator and the correspondingly disposed second parasitic radiator overlap in the thickness direction of the foldable electronic device, such that the second antenna radiator and the second parasitic radiator are coupled.

[0011] The second parasitic radiator includes a first end and a second end, and has a second parasitic grounding point located between the first end and the second end and close to the second end. The second parasitic grounding point is grounded through the second device body. The first end is closer to the pivot relative to the second end. The floor of the second device body has a side edge away from the pivot and another side edge intersecting the side edge. At least a portion of the second parasitic radiator extends in a direction perpendicular to the pivot to be located outside the other side edge of the floor of the second device body and opposite to the other side edge of the floor. The at least portion of the second parasitic radiator is perpendicular to the at least portion of the second antenna radiator.

[0012] In this scheme, by additionally setting a second parasitic radiator that corresponds to and at least partially overlaps with the position of the second antenna radiator, it is possible to further improve the low envelope correlation coefficient between the two antennas of the pair of antennas, as well as the antenna efficiency of the two antennas.

[0013] In some embodiments, the first antenna radiator includes a first end and a second end, and has a first feed point located between the first end and the second end, and a first ground point located between the first feed point and the second end, wherein the second end is closer to the second antenna radiator than the first end; the first ground point of the first antenna radiator is grounded through the first device body; the second antenna radiator includes a first end and a second end, and has a second feed point located between the first end and the second end, and a second ground point located between the second feed point and the first end, wherein the second end is closer to the first antenna radiator than the first end; the second ground point of the second antenna radiator is grounded through the first device body.

[0014] In some embodiments, the first antenna radiator is L-shaped and located at a first corner of the first conductive frame of the first device body, and includes intersecting first straight line segment and second straight line segment, wherein the first straight line segment extends in a direction parallel to the axis of rotation; the second antenna radiator is L-shaped and located at a second corner of the first conductive frame of the first device body, and includes intersecting first straight line segment and second straight line segment, wherein the first straight line segment extends in a direction parallel to the axis of rotation.

[0015] In some embodiments, the first parasitic radiator includes a first end and a second end, and has a first parasitic grounding point located between the first end and the second end, the first parasitic grounding point being grounded through the second device body, and when the foldable electronic device is in a folded state, the second end of the first parasitic radiator is closer to the second antenna radiator relative to the first end; at least a portion of the first parasitic radiator extends in a direction parallel to the axis of rotation to be located outside the edge of the floor of the second device body on the side away from the axis of rotation.

[0016] In some embodiments, the first parasitic radiator is L-shaped and located at the first corner of the second conductive frame of the second device body. When the foldable electronic device is in a folded state, the first corner of the second conductive frame overlaps with the first corner of the first conductive frame in the thickness direction of the foldable electronic device. The first parasitic radiator includes intersecting first straight line segments and second straight line segments, wherein the first straight line segment extends in a direction parallel to the axis of rotation.

[0017] This application embodiment also provides a foldable electronic device, including a first device body and a second device body, which are connected by a hinge. The first device body has a first conductive frame, and the second device body has a second conductive frame. The foldable electronic device further includes:

[0018] A first antenna and a second antenna, the first antenna including a first antenna radiator, the second antenna including a second antenna radiator, the first antenna radiator and the second antenna radiator being located in the main body of the first device, wherein the operating frequency band of the first antenna and the operating frequency band of the second antenna are the same or partially overlap;

[0019] The parasitic radiator is located in the main body of the second equipment and is grounded through the main body of the second equipment.

[0020] The first antenna radiator and the second antenna radiator are formed by a first conductive frame of the first device body, and the parasitic radiator is formed by a second conductive frame of the second device body; at least a portion of the first antenna radiator and at least a portion of the second antenna radiator extend in a direction parallel to the axis of rotation, so as to be located outside the edge of the floor of the first device body away from the axis of rotation, respectively. When the foldable electronic device is in a folded state, at least a portion of the second antenna radiator and the parasitic radiator overlap in the thickness direction of the foldable electronic device, such that the second antenna radiator and the parasitic radiator are coupled.

[0021] In this scheme, by setting a parasitic radiator that corresponds to and at least partially overlaps with the second antenna radiator in the folded state, the first antenna and the second antenna can still work independently and normally when the foldable electronic device is in the folded state, even when the two antennas of the pair are close to each other and have a low envelope correlation coefficient (i.e., ECC). Both antennas of the pair have high antenna efficiency, thus improving the antenna performance of the foldable electronic device in the folded state.

[0022] In some embodiments, the first antenna radiator includes a first end and a second end, and has a first feed point located between the first end and the second end, and a first ground point located between the first feed point and the second end, wherein the second end is closer to the second antenna radiator than the first end; the first ground point of the first antenna radiator is grounded through the first device body; the first antenna radiator is L-shaped and located at a first corner of a first conductive frame of the first device body, and includes intersecting first and second straight line segments, wherein the first straight line segment extends in a direction parallel to the axis of rotation; the second antenna radiator includes a first end and a second end, and has a second feed point located between the first end and the second end, and a second ground point located between the second feed point and the first end, wherein the second end is closer to the first antenna radiator than the first end; the second ground point of the second antenna radiator is grounded through the first device body; the second antenna radiator is L-shaped and located at a second corner of a first conductive frame of the first device body, and includes intersecting first and second straight line segments, wherein the first straight line segment extends in a direction parallel to the axis of rotation.

[0023] In some embodiments, the parasitic radiator includes a first end and a second end, and has a parasitic grounding point located between the first end and the second end and near the second end, the parasitic grounding point being grounded through the second device body, the first end being closer to the pivot than the second end; the floor of the second device body has a side edge away from the pivot and another side edge intersecting the side edge, at least a portion of the parasitic radiator extending in a direction perpendicular to the pivot to be located outside the other side edge of the floor of the second device body, and the at least portion of the parasitic radiator being perpendicular to the at least portion of the second antenna radiator.

[0024] In some embodiments, the parasitic radiator is L-shaped and located at the second corner of the second conductive frame of the second device body. When the foldable electronic device is in a folded state, the second corner of the second conductive frame overlaps with the second corner of the first conductive frame in the thickness direction of the foldable electronic device. The parasitic radiator includes intersecting first and second straight segments, wherein the first straight segment extends in a direction perpendicular to the axis of rotation; the parasitic grounding point is located on the second straight segment.

[0025] In some embodiments, when the foldable electronic device is in a folded state, in a direction perpendicular to the axis of rotation, the first end of the parasitic radiator is closer to the axis of rotation than the first end of the second antenna radiator, and in a direction parallel to the axis of rotation, the second end of the second antenna radiator is closer to the first antenna radiator than the second end of the parasitic radiator.

[0026] This application embodiment also provides a foldable electronic device, including a first device body and a second device body, which are connected by a hinge. The first device body has a first conductive frame, and the second device body has a second conductive frame. The foldable electronic device further includes:

[0027] A first antenna and a second antenna, wherein the first antenna includes a first antenna radiator and the second antenna includes a second antenna radiator, the first antenna radiator is located in the main body of the first device and the second antenna radiator is located in the main body of the second device, wherein the operating frequency band of the first antenna and the operating frequency band of the second antenna are the same or partially overlap;

[0028] The first parasitic radiator is located in the main body of the second equipment, and is grounded through the main body of the second equipment; wherein...

[0029] The first antenna radiator is formed by a first conductive frame of the first device body, and the second antenna radiator and the first parasitic radiator are formed by a second conductive frame of the second device body. At least a portion of the first antenna radiator extends in a direction parallel to the axis of rotation to be located outside the edge of the floor of the first device body away from the axis of rotation, and at least a portion of the second antenna radiator extends in a direction parallel to the axis of rotation to be located outside the edge of the floor of the second device body away from the axis of rotation. When the foldable electronic device is in a folded state, at least a portion of the first antenna radiator and the first parasitic radiator overlap in the thickness direction of the foldable electronic device, such that the first antenna radiator and the first parasitic radiator are coupled, and the first antenna radiator and the second antenna radiator do not overlap.

[0030] This application provides a foldable electronic device, including a device body and an antenna system. The device body includes a first device body and a second device body, which are rotatably connected by a pivot, so that the foldable electronic device can switch between an unfolded state and a folded state.

[0031] The antenna system includes a first antenna and a second antenna. The first antenna includes a first antenna radiator in the shape of a strip, and the second antenna includes a second antenna radiator in the shape of a strip. The first antenna radiator is located on one side of a virtual line, and the second antenna radiator is located on the opposite side of the virtual line. The virtual line is perpendicular to the axis of rotation.

[0032] The antenna system also includes a strip-shaped first parasitic radiator positioned corresponding to the position of the first antenna radiator and / or a strip-shaped second parasitic radiator positioned corresponding to the position of the second antenna radiator. The first parasitic radiator and the first antenna radiator are located in different equipment bodies within the first and second equipment bodies, respectively. The second parasitic radiator and the second antenna radiator are also located in different equipment bodies within the first and second equipment bodies, respectively. The first and second parasitic radiators are each connected to the floor of their respective equipment bodies.

[0033] At least a portion of the first antenna radiator and at least a portion of the second antenna radiator are respectively located outside the edge of the floor of the device body away from the pivot, and are respectively disposed opposite to that edge of the floor of the device body. When the foldable electronic device is in a folded state, from the thickness direction of the foldable electronic device, at least a portion of the first antenna radiator overlaps with at least a portion of the corresponding first parasitic radiator, and at least a portion of the second antenna radiator overlaps with at least a portion of the corresponding second parasitic radiator, so that the first antenna radiator and the second antenna radiator are respectively coupled to the corresponding parasitic radiator.

[0034] In this solution, by setting a first parasitic radiator that corresponds to and at least partially overlaps with the first antenna radiator in the folded state, and / or setting a second parasitic radiator that corresponds to and at least partially overlaps with the second antenna radiator in the folded state, the first antenna and the second antenna can still work independently and normally when the foldable electronic device is in the folded state, even when the two antennas of the pair are close to each other, and the two antennas of the pair have a low envelope correlation coefficient (i.e., ECC). Moreover, both antennas of the pair have high antenna efficiency, that is, the antenna performance of the foldable electronic device in the folded state is improved.

[0035] In some possible embodiments, the virtual line is the centerline of the device body or parallel to the centerline of the device body, which is perpendicular to the axis of rotation.

[0036] In some possible embodiments, the floor of the first device body and the floor of the second device body are symmetrical about the axis of rotation, and the structure and dimensions of the floor of the first device body and the floor of the second device body are the same.

[0037] In some possible embodiments, the floor of the first device body and the floor of the second device body are rectangular plate structures.

[0038] In some possible embodiments, the floor of the first device body and the floor of the second device body may be formed by the base plate of the mid-frame of the foldable electronic device (i.e., the foldable smartphone).

[0039] In some embodiments, the first antenna radiator includes a first end and a second end, and has a first feed point located between the first end and the second end or at the first end, and a first ground point located between the first feed point and the second end or at the second end, wherein the second end is closer to the virtual line than the first end; the first ground point of the first antenna radiator is connected to the floor of the device body where the first antenna radiator is located;

[0040] The second antenna radiator includes a first end and a second end, and has a second feed point located between the first end and the second end or at the second end, and a second ground point located between the second feed point and the first end or at the first end, the second end being closer to the virtual line than the first end; the second ground point of the second antenna radiator is connected to the floor of the equipment body where the second antenna radiator is located.

[0041] In some possible embodiments, in the axial direction parallel to the axis of rotation, the first ground point is closer to the virtual line relative to the first feed point, and the second end of the first antenna radiator is closer to the virtual line relative to the first end.

[0042] In the axial direction parallel to the rotation axis, the second feed point is closer to the virtual line relative to the second ground point, and the second end of the second antenna radiator is closer to the virtual line relative to the first end.

[0043] In some embodiments, the first antenna radiator is in the shape of a straight strip; or, the first antenna radiator is in the shape of an L and includes a first straight segment and a second straight segment perpendicularly connected to the end of the first straight segment away from the virtual line, the free end of the first straight segment and the free end of the second straight segment being the second end and the first end of the first antenna radiator, respectively, wherein the first straight segment is disposed opposite to the side edge of the floor of the device body on which the first antenna radiator is located, and the second straight segment is located outside the other side edge of the floor of the device body on which the first antenna radiator is located, intersecting with the side edge, and is disposed opposite to the other side edge of the floor;

[0044] And / or, the second antenna radiator is straight; or, the second antenna radiator is L-shaped and includes a first straight segment and a second straight segment perpendicularly connected to the end of the first straight segment away from the virtual line, the free ends of the first and second straight segments being the second and first ends of the second antenna radiator, respectively, wherein the first straight segment is disposed opposite to the side edge of the floor of the device body on which the second antenna radiator is located, and the second straight segment is located outside the other side edge of the floor of the device body on which the second antenna radiator is located, intersecting with the side edge, and is disposed opposite to the other side edge of the floor.

[0045] In some possible embodiments, when the first antenna radiator is in the shape of a straight strip, the first antenna radiator extends in a straight line along the edge of the floor of the device body on that side where the first antenna radiator is located.

[0046] In some possible embodiments, when the first antenna radiator is in the shape of a straight strip, the first antenna radiator extends along an axis parallel to the axis of rotation.

[0047] In some possible embodiments, when the first antenna radiator is L-shaped, the first antenna radiator is also located near a pair of corners away from the axis of rotation on the floor of the device body where the first antenna radiator is located, and extends along the corner edge of the opposite corner of the floor.

[0048] In some possible embodiments, when the first antenna radiator is L-shaped, the first straight segment extends along an axis parallel to the axis of rotation, and the second straight segment extends along an axis perpendicular to the axis of rotation.

[0049] In some possible embodiments, when the second antenna radiator is in the shape of a straight strip, the second antenna radiator extends in a straight line along the edge of the floor of the device body on which the second antenna radiator is located.

[0050] In some possible embodiments, when the second antenna radiator is in the shape of a straight strip, the second antenna radiator extends along an axis parallel to the axis of rotation.

[0051] In some possible embodiments, when the second antenna radiator is L-shaped, the second antenna radiator is also located near a pair of corners away from the axis of rotation on the floor of the device body where the second antenna radiator is located, and extends along the corner edges of the opposite corner of the floor.

[0052] In some possible embodiments, when the second antenna radiator is L-shaped, the first straight segment extends along an axial direction parallel to the axis of rotation, and the second straight segment extends along an axial direction perpendicular to the axis of rotation.

[0053] In some possible embodiments, when both the first antenna radiator and the second antenna radiator are straight strips, the extending directions of the first antenna radiator and the extending directions of the second antenna radiator are on the same straight line or parallel to each other.

[0054] When both the first antenna radiator and the second antenna radiator are L-shaped, the extension direction of the first straight segment of the first antenna radiator and the extension direction of the first straight segment of the second antenna radiator are on the same straight line or parallel to each other, and the extension direction of the second straight segment of the first antenna radiator and the extension direction of the second straight segment of the second antenna radiator are parallel to each other.

[0055] When the first antenna radiator is straight and the second antenna radiator is L-shaped, the extension direction of the first antenna radiator and the extension direction of the first straight segment of the second antenna radiator are on the same straight line or parallel to each other.

[0056] When the first antenna radiator is L-shaped and the second antenna radiator is straight, the extension direction of the first straight segment of the first antenna radiator and the extension direction of the second antenna radiator are on the same straight line or parallel to each other.

[0057] In some embodiments, the first parasitic radiator includes a first end and a second end, and has a first parasitic grounding point located between the first end and the second end or at either the first end or the second end, the first parasitic grounding point being connected to the floor of the device body where the first parasitic radiator is located, and the second end being closer to the virtual line relative to the first end; at least a portion of the first parasitic radiator is located outside the side edge of the floor of the device body where it is located, away from the pivot, and is disposed opposite to that side edge of the floor of the device body where it is located.

[0058] In some possible embodiments, in an axial direction parallel to the axis of rotation, the second end of the first parasitic radiator is closer to the virtual line than the first end.

[0059] In some embodiments, the first parasitic radiator is in the shape of a straight strip;

[0060] Alternatively, the first parasitic radiator is L-shaped and includes a first straight segment and a second straight segment perpendicularly connected to the end of the first straight segment away from the virtual line. The free ends of the first and second straight segments are the second and first ends of the first parasitic radiator, respectively. The first straight segment is disposed opposite to the side edge of the floor of the device body on which the first parasitic radiator is located, and the second straight segment is located outside the other side edge of the floor of the device body on which the first parasitic radiator is located, intersecting with the side edge, and is disposed opposite to the other side edge of the floor.

[0061] In some possible embodiments, when the first parasitic radiator is in the shape of a straight strip, the first parasitic radiator extends in a straight line along the side edge of the floor of the device body where the first parasitic radiator is located.

[0062] In some possible embodiments, when the first parasitic radiator is in the shape of a straight strip, the first parasitic radiator extends along an axis parallel to the axis of rotation.

[0063] In some possible embodiments, when the first parasitic radiator is L-shaped, the first parasitic radiator is also located near a pair of corners away from the axis of rotation on the floor of the device body where the first parasitic radiator is located, and extends along the corner edge of the opposite corner of the floor.

[0064] In some possible embodiments, when the first parasitic radiator is L-shaped, the first straight segment extends along an axial direction parallel to the axis of rotation, and the second straight segment extends along an axial direction perpendicular to the axis of rotation.

[0065] In some possible embodiments, when both the first antenna radiator and the first parasitic radiator are straight strips, the extending direction of the first antenna radiator and the extending direction of the first parasitic radiator are parallel to each other.

[0066] When both the first antenna radiator and the first parasitic radiator are L-shaped, the extension direction of the first straight segment of the first antenna radiator and the extension direction of the first straight segment of the first parasitic radiator are parallel to each other, and the extension direction of the second straight segment of the first antenna radiator and the extension direction of the second straight segment of the first parasitic radiator are parallel to each other.

[0067] When the first antenna radiator is straight and the first parasitic radiator is L-shaped, the extension direction of the first antenna radiator and the extension direction of the first straight segment of the first parasitic radiator are parallel to each other.

[0068] When the first antenna radiator is L-shaped and the first parasitic radiator is straight, the extension direction of the first straight segment of the first antenna radiator and the extension direction of the first parasitic radiator are parallel to each other.

[0069] In some embodiments, when the first parasitic grounding point is located between the first end and the second end of the first parasitic radiator, the first parasitic grounding point is located at the middle of the first parasitic radiator or near the first end or the second end.

[0070] And / or, when the foldable electronic device is in a folded state, the first end of the first parasitic radiator is close to the first end of the first antenna radiator, and the second end of the first parasitic radiator is close to the second end of the first antenna radiator.

[0071] And / or, at least a portion of the first parasitic radiator is parallel to at least a portion of the first antenna radiator.

[0072] In some embodiments, when the first parasitic radiator includes a first straight segment and a second straight segment, and the first parasitic grounding point is located in the middle of the first parasitic radiator, the first parasitic grounding point is located in the first straight segment;

[0073] When the first parasitic radiator includes a first straight segment and a second straight segment, and the first parasitic grounding point is located near the first end of the first parasitic radiator, the first parasitic grounding point is located in the second straight segment.

[0074] When the first parasitic radiator includes a first straight segment and a second straight segment, and the first parasitic grounding point is located near the second end of the first parasitic radiator, the first parasitic grounding point is located on the first straight segment.

[0075] In some embodiments, when the first antenna radiator includes a first straight segment and a second straight segment, both the first feed point and the first ground point are located on the first straight segment;

[0076] The first grounding point is located at the second end near the first antenna radiator; or...

[0077] The first grounding point is located in the middle of the first straight segment of the first antenna radiator.

[0078] In some embodiments, the second parasitic radiator includes a first end and a second end, and has a second parasitic grounding point located between the first end and the second end and near the second end, or located at the second end. The second parasitic grounding point is connected to the floor of the device body on which the second parasitic radiator is located, and the first end is closer to the pivot point than the second end. The floor of the device body on which the second parasitic radiator is located has a side edge away from the pivot point and another side edge intersecting the side edge. At least a portion of the second parasitic radiator is located outside the other side edge of the floor of the device body on which it is located and is disposed opposite to the other side edge of the floor. The at least portion of the second parasitic radiator is disposed perpendicular to the at least portion of the second antenna radiator.

[0079] In some possible embodiments, in a direction parallel to the virtual line, the first end of the second parasitic radiator is closer to the axis of rotation than the second end;

[0080] In some embodiments, the second parasitic radiator is in the shape of a straight strip;

[0081] Alternatively, the second parasitic radiator is L-shaped and includes a first straight segment and a second straight segment perpendicularly connected to the end of the first straight segment away from the axis of rotation. The free ends of the first and second straight segments are respectively the first and second ends of the second parasitic radiator. The first straight segment is disposed opposite to the other side edge of the floor of the main body of the equipment containing the first parasitic radiator, and the second straight segment is located outside the other side edge of the floor of the main body of the equipment containing the first parasitic radiator and is disposed opposite to the other side edge of the floor.

[0082] In some possible embodiments, when the second parasitic radiator is in the shape of a straight strip, the second parasitic radiator extends in a straight line along the edge of the floor of the device body on which the second parasitic radiator is located.

[0083] In some possible embodiments, when the second parasitic radiator is in the shape of a straight strip, the second parasitic radiator extends along an axis perpendicular to the axis of rotation.

[0084] In some possible embodiments, when the second parasitic radiator is L-shaped, the second parasitic radiator is also located near a pair of corners away from the axis of rotation on the floor of the device body where the second parasitic radiator is located, and extends along the corner edge of the opposite corner of the floor.

[0085] In some possible embodiments, when the second parasitic radiator is L-shaped, the first straight segment extends along an axial direction perpendicular to the axis of rotation, and the second straight segment extends along an axial direction parallel to the axis of rotation.

[0086] In some possible embodiments, when both the second antenna radiator and the second parasitic radiator are L-shaped, the extension direction of the first straight segment of the second antenna radiator and the extension direction of the second straight segment of the second parasitic radiator are parallel to each other, and the extension direction of the second straight segment of the second antenna radiator and the extension direction of the first straight segment of the second parasitic radiator are parallel to each other.

[0087] When the second antenna radiator is straight and the second parasitic radiator is L-shaped, the extension direction of the second antenna radiator and the extension direction of the second straight segment of the second parasitic radiator are parallel to each other, and the extension direction of the second antenna radiator and the extension direction of the first straight segment of the second parasitic radiator are perpendicular to each other.

[0088] When the second antenna radiator is L-shaped and the second parasitic radiator is straight, the extension direction of the first straight segment of the second antenna radiator and the extension direction of the second parasitic radiator are perpendicular to each other, and the extension direction of the second straight segment of the second antenna radiator and the extension direction of the second parasitic radiator are parallel to each other.

[0089] In some embodiments, when the second parasitic radiator includes a first straight segment and a second straight segment, the second parasitic grounding point is located on the second straight segment, and the length of the first straight segment is greater than the length of the second straight segment.

[0090] In some embodiments, when the foldable electronic device is in a folded state, in a direction parallel to the virtual line, the first end of the second parasitic radiator is closer to the axis of rotation than the first end of the second parasitic radiator, and in an axial direction parallel to the axis of rotation, the second end of the second parasitic radiator is closer to the virtual line than the second end of the second parasitic radiator.

[0091] In some embodiments, the second grounding point of the second antenna radiator is located near the first end of the second antenna radiator, and the second feed point is located near the second end of the second antenna radiator.

[0092] In some embodiments, when the second antenna radiator includes a first straight segment and a second straight segment, the second feed point is located on the first straight segment and the second grounding point is located on the second straight segment.

[0093] In some embodiments, the operating frequency bands of the first antenna and the second antenna are the same or partially overlap.

[0094] And / or, the extension direction of at least a portion of the first antenna radiator and the extension direction of at least a portion of the second antenna radiator are on the same straight line or parallel to each other;

[0095] And / or, at least a portion of the first antenna radiator and at least a portion of the second antenna radiator extend along an axis parallel to the axis of rotation.

[0096] In some possible embodiments, the operating frequency band of the first antenna is in the range of 0.7 to 0.96 GHz, and the operating frequency band of the second antenna is in the range of 0.7 to 0.96 GHz, that is, the operating frequency bands of the first antenna and the second antenna are low frequency.

[0097] In some embodiments, the first antenna radiator, the second antenna radiator, the first parasitic radiator, and the second parasitic radiator are formed by the conductive frame of the foldable electronic device;

[0098] Alternatively, the first antenna radiator, the second antenna radiator, the first parasitic radiator, and the second parasitic radiator adopt a patch structure, which is attached to the surface of the conductive frame of the foldable electronic device and is made of conductive material.

[0099] Alternatively, the first antenna radiator, the second antenna radiator, the first parasitic radiator, and the second parasitic radiator may be transparent antennas embedded inside the screen of a foldable electronic device.

[0100] Alternatively, the first antenna radiator, the second antenna radiator, the first parasitic radiator, and the second parasitic radiator may adopt a patch structure, which is attached to the back cover of the foldable electronic device and is made of conductive material.

[0101] In some embodiments, a first antenna radiator and a second antenna radiator are disposed on a first device body, and a first parasitic radiator and / or a second parasitic radiator are disposed on a second device body.

[0102] In some embodiments, the first device body is the device body on the side where the main screen of the foldable electronic device is located, and the second device body is the device body on the side where the secondary screen of the foldable electronic device is located. Attached Figure Description

[0103] Figure 1a This is a schematic diagram of the structure of a foldable electronic device in its unfolded state.

[0104] Figure 1b This is a schematic diagram of the structure of a foldable electronic device in a folded state.

[0105] Figure 2 The simulation curves of the ECC parameter performance between the first and second antennas are shown for the foldable electronic device in both unfolded and folded states. The operating frequency range of the first and second antennas is 0.7 GHz to 0.96 GHz.

[0106] Figure 3a Simulation results of the radiation efficiency and system efficiency of the first antenna when the foldable electronic device is in both the unfolded and folded states.

[0107] Figure 3b Simulation results of the radiation efficiency and system efficiency of the second antenna when the foldable electronic device is in both the unfolded and folded states.

[0108] Figure 4 This is a schematic diagram of the first embodiment of the foldable electronic device of Embodiment 1 of this application in its unfolded state;

[0109] Figure 5This is a schematic diagram of the second embodiment of the foldable electronic device of Embodiment 1 of this application in its unfolded state;

[0110] Figure 6 This is a schematic diagram of the structure of the third embodiment of the foldable electronic device of Embodiment 1 of this application in the unfolded state;

[0111] Figure 7 This is a schematic diagram of the fourth embodiment of the foldable electronic device of Embodiment 1 of this application in its unfolded state;

[0112] Figure 8 This is a structural schematic diagram of the fifth embodiment of the foldable electronic device of Embodiment 1 of this application in the unfolded state;

[0113] Figure 9 A schematic diagram of the unfolded state of the foldable electronic device, which is the first reference design.

[0114] Figure 10a This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the first embodiment of this application and the first reference design when the foldable electronic device is in the folded state.

[0115] Figure 10b This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the second embodiment of Embodiment 1 of this application and the first reference design when the foldable electronic device is in the folded state;

[0116] Figure 10c This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the third embodiment of Embodiment 1 of this application and the first reference design when the foldable electronic device is in the folded state.

[0117] Figures 11a to 11d The first reference design, the first embodiment, the second embodiment, and the third embodiment of the foldable electronic device of this application are in the folded state when the first foldable electronic device is in the folded state.

[0118] Figure 12 A schematic diagram of the current distribution structure near the first antenna when the foldable electronic device of the first reference design is in a folded state.

[0119] Figure 13a and Figure 13b This is a schematic diagram of the current distribution structure near the first antenna position of the foldable electronic device according to the first embodiment of this application when it is in a folded state. Figure 13a The view shown is from one side of the main screen. Figure 13b The view shown is from one side of the secondary screen;

[0120] Figure 14a and Figure 14b This is a schematic diagram of the current distribution structure near the first antenna position of the foldable electronic device in the second embodiment of this application when it is in a folded state. Figure 14a The view shown is from one side of the main screen. Figure 14b The view shown is from one side of the secondary screen;

[0121] Figure 15a and Figure 15b This is a schematic diagram of the current distribution structure near the first antenna position of the foldable electronic device in the third embodiment of this application when it is in a folded state. Figure 15a The view shown is from one side of the main screen. Figure 15b The view shown is from one side of the secondary screen;

[0122] Figure 16 This is a schematic diagram of the structure of the first embodiment of the foldable electronic device of Embodiment 2 of this application in the unfolded state;

[0123] Figure 17 This is a schematic diagram of the second embodiment of the foldable electronic device of Embodiment 2 of this application in its unfolded state;

[0124] Figure 18 A schematic diagram of the unfolded state of the foldable electronic device for the second reference design;

[0125] Figure 19 A schematic diagram of the unfolded state of the foldable electronic device for the third reference design;

[0126] Figure 20 When the foldable electronic device of the first embodiment, second reference design, and third reference design of this application is in the folded state, the second antenna S 11 Comparison of simulation results for the parameters;

[0127] Figure 21 The simulation results of the first embodiment of Embodiment 2 of this application, the second reference design, and the third reference design of the foldable electronic device are compared when the second antenna and the first antenna are in the folded state.

[0128] Figure 22 The simulation comparison diagram shows the radiation efficiency and system efficiency of the second antenna when the foldable electronic device of the first embodiment, second reference design and third reference design of this application is in the folded state.

[0129] Figure 23The radiation pattern of the second antenna when the foldable electronic device of the first embodiment of Example 2 of this application and the second reference design is in a folded state;

[0130] Figure 24a and Figure 24b This is a schematic diagram of the current distribution structure near the second antenna position of the foldable electronic device in the first embodiment of this application when it is in a folded state. Figure 24a The view shown is from one side of the main screen. Figure 24b The view shown is from one side of the secondary screen;

[0131] Figure 25 This is a schematic diagram of the first embodiment of the foldable electronic device of Embodiment 3 of this application in its unfolded state;

[0132] Figure 26 This is a schematic diagram of the second embodiment of the foldable electronic device of Embodiment 3 of this application in the unfolded state;

[0133] Figure 27 This is a structural schematic diagram of the third embodiment of the foldable electronic device of Embodiment 3 of this application in the unfolded state;

[0134] Figure 28 This is a structural schematic diagram of the fourth embodiment of the foldable electronic device of Embodiment 3 of this application in the unfolded state.

[0135] Explanation of reference numerals in the attached figures:

[0136] 100': Foldable electronic devices;

[0137] 200': Main body of the equipment; 210': First main body of the equipment; 211': Floor; 212': Left edge; 220': Second main body of the equipment; 250': Rotating shaft;

[0138] 300': Antenna system;

[0139] 400': First antenna; 410': First antenna radiator; 411': First end; 412': Second end; 413': First straight segment; 414': Second straight segment; 420': First feed point; 430': First grounding point;

[0140] 500': Second antenna; 510': Second antenna radiator; 511': First end; 512': Second end; 513': First straight segment; 514': Second straight segment; 520': Second feed point; 530': Second grounding point;

[0141] 800': First radio frequency source; 810': Second radio frequency source;

[0142] 100: Foldable electronic devices;

[0143] 200: Equipment body; 210: First equipment body; 211: Floor; 212: Left edge; 213: Upper edge; 214: Lower edge; 215: First diagonal; 216: Second diagonal; 220: Second equipment body; 221: Floor; 222: Right edge; 224: Lower edge; 225: First diagonal; 250: Rotating shaft;

[0144] 300: Antenna system;

[0145] 400: First antenna; 410: First antenna radiator; 411: First end; 412: Second end; 413: First straight segment; 414: Second straight segment; 420: First feed point; 430: First grounding point;

[0146] 500: Second antenna; 510: Second antenna radiator; 511: First end; 512: Second end; 513: First straight segment; 514: Second straight segment; 520: Second feed point; 530: Second grounding point;

[0147] 600: First parasitic radiator; 610: First parasitic grounding point; 620: First straight segment; 630: Second straight segment; 640: First end; 650: Second end;

[0148] 800: First radio frequency source; 810: Second radio frequency source;

[0149] 100A: Foldable electronic device;

[0150] 200A: Main body of the equipment; 210A: First main body of the equipment; 211A: Floor; 220A: Second main body of the equipment; 221A: Floor; 250A: Rotating shaft;

[0151] 300A: Antenna system;

[0152] 400A: First antenna; 410A: First antenna radiator; 411A: First terminal; 412A: Second terminal; 420A: First feed point; 430A: First ground point;

[0153] 500A: Second antenna; 510A: Second antenna radiator; 511A: First terminal; 512A: Second terminal; 520A: Second feed point; 530A: Second grounding point;

[0154] 600A: First parasitic radiator; 610A: First parasitic grounding point; 620A: First straight segment; 630A: Second straight segment; 640A: First end; 650A: Second end;

[0155] 800A: First RF source; 810A: Second RF source;

[0156] 100B: Foldable electronic devices;

[0157] 200B: Main body of the equipment; 210B: First main body of the equipment; 211B: Floor; 220B: Second main body of the equipment; 221B: Floor; 250B: Rotating shaft;

[0158] 300B: Antenna system;

[0159] 400B: First antenna; 410B: First antenna radiator; 411B: First terminal; 412B: Second terminal; 420B: First feed point; 430B: First ground point;

[0160] 500B: Second antenna; 510B: Second antenna radiator; 511B: First terminal; 512B: Second terminal; 520B: Second feed point; 530B: Second grounding point;

[0161] 600B: First parasitic radiator; 610B: First parasitic grounding point; 620B: First straight segment; 630B: Second straight segment; 640B: First end; 650B: Second end;

[0162] 800B: First RF source; 810B: Second RF source;

[0163] 100C: Foldable electronic devices;

[0164] 210C: Main body of the first equipment; 211C: Floor; 212C: Left edge; 250C: Rotating shaft;

[0165] 500C: Secondary antenna; 510C: Secondary antenna radiator;

[0166] 100D: Foldable electronic device;

[0167] 410D: First antenna radiator; 411D: First end; 412D: Second end; 413D: First straight segment; 414D: Second straight segment; 420D: First feed point; 430D: First ground point;

[0168] 100E: Foldable electronic devices;

[0169] 200E: Main body of the equipment; 210E: First main body of the equipment; 211E: Floor; 212E: Left edge; 220E: Second main body of the equipment; 221E: Floor; 222E: Right edge; 223E: Top edge; 226E: Second diagonal; 250E: Rotating shaft;

[0170] 300E: Antenna system;

[0171] 400E: First antenna; 410E: First antenna radiator; 411E: First end; 412E: Second end; 413E: First straight segment; 414E: Second straight segment; 420E: First feed point; 430E: First ground point;

[0172] 500E: Second antenna; 510E: Second antenna radiator; 511E: First end; 512E: Second end; 513E: First straight segment; 514E: Second straight segment; 520E: Second feed point; 530E: Second grounding point;

[0173] 700E: Second parasitic radiator; 710E: Second parasitic grounding point; 720E: First straight segment; 730E: Second straight segment; 740E: First end; 750E: Second end;

[0174] 800E: First RF source; 810E: Second RF source;

[0175] 100F: Foldable electronic devices;

[0176] 200F: Main body of the equipment; 210F: First main body of the equipment; 211F: Floor; 212F: Left edge; 220F: Second main body of the equipment; 250F: Rotating shaft;

[0177] 300F: Antenna system;

[0178] 400F: First antenna; 410F: First antenna radiator;

[0179] 500F: Secondary antenna; 510F: Secondary antenna radiator;

[0180] 700F: Second parasitic radiator;

[0181] 100G: Foldable electronic devices;

[0182] 200G: Main body of the equipment; 210G: First main body of the equipment; 220G: Second main body of the equipment; 221G: Floor; 250G: Spindle;

[0183] 300G: Antenna system;

[0184] 400G: First antenna; 410G: First antenna radiator;

[0185] 500G: Secondary antenna; 510G: Secondary antenna emitter;

[0186] 600G: First parasitic radiator;

[0187] 700G: Second parasitic radiator;

[0188] 100H: Foldable electronic device;

[0189] 210H: Main body of the first equipment;

[0190] 220H: Main body of the second equipment;

[0191] 410H: First antenna radiator;

[0192] 510H: Secondary antenna radiator;

[0193] 600H: First parasitic radiator;

[0194] 700H: Second parasitic radiator;

[0195] 100I: Foldable electronic device;

[0196] 200I: Main body of the equipment; 210I: First main body of the equipment; 220I: Second main body of the equipment; 250I: Rotating shaft;

[0197] 410I: First antenna radiator;

[0198] 510I: Secondary antenna radiator;

[0199] 600I: First parasitic radiator;

[0200] 700I: Second parasitic radiator;

[0201] 100J: Foldable electronic devices;

[0202] 210J: Main body of the first equipment; 220J: Main body of the second equipment;

[0203] 410J: First antenna radiator;

[0204] 510J: Secondary antenna radiator;

[0205] 600J: First parasitic radiator;

[0206] 700J: Second parasitic radiator;

[0207] O1: Virtual line;

[0208] O2: Axis;

[0209] T: horizontal;

[0210] L: Vertical;

[0211] L11: The length of the first straight segment of the first antenna radiator;

[0212] L12: The length of the second straight segment of the first antenna radiator;

[0213] L13: The length of the first antenna radiator located between the first grounding point and the second end;

[0214] L14: The length of the first antenna radiator located between the first grounding point and the first feed point;

[0215] L2: The length of the second antenna radiator;

[0216] L21: The length of the first straight segment of the second antenna radiator;

[0217] L22: The length of the second straight segment of the second antenna radiator;

[0218] L23: The length of the second antenna radiator located between the second grounding point and the second end;

[0219] L24: The length of the second antenna radiator located between the second grounding point and the second feed point;

[0220] L25: The length of the second antenna radiator located between the second grounding point and the first end;

[0221] L31: The length of the first straight segment of the first parasitic radiator;

[0222] L32: The length of the second straight segment of the first parasitic radiator;

[0223] L33: The length of the first parasitic radiator located between the first parasitic grounding point and the second end;

[0224] L34: The length of the first parasitic radiator located between the first parasitic grounding point and the first end.

[0225] L41: The length of the first straight segment of the second parasitic radiator;

[0226] L42: The length of the second straight segment of the second parasitic radiator;

[0227] L43: The length of the second parasitic radiator located between the second parasitic grounding point and the second end;

[0228] L44: The length of the second parasitic radiator located between the second parasitic grounding point and the first end;

[0229] d: The distance between the second end of the first antenna radiator and the second end of the second antenna radiator;

[0230] 100A': Foldable electronic device;

[0231] 220A': Second equipment body; 221A': Floor;

[0232] 600A': First parasitic radiator;

[0233] 100B': Foldable electronic device;

[0234] 220B': Main body of the second equipment; 221B': Floor;

[0235] 700B': Second parasitic radiator;

[0236] 100C': Foldable electronic devices;

[0237] 220C': Second main body of the equipment; 222C': Right edge; 250C': Rotating shaft;

[0238] 700C': Second parasitic radiator. Detailed Implementation

[0239] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application will be presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0240] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0241] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0242] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0243] In the description of this application, it should be understood that "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form of connection between different components in a circuit structure through physical lines such as copper foil or wires on a printed circuit board (PCB) capable of transmitting electrical signals. "Communication connection" can refer to the transmission of electrical signals, including wireless communication connections and wired communication connections. Wireless communication connections do not require a physical medium and are not considered connections that limit the product structure.

[0244] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0245] Please see Figures 1a-1b , Figure 1a This is a schematic diagram of the foldable electronic device 100' in its unfolded state. Figure 1b This is a schematic diagram of the foldable electronic device 100' in its folded state.

[0246] like Figure 1a As shown, the foldable electronic device 100' includes a device body 200' and an antenna system 300'. The device body 200' includes a first device body 210' and a second device body 220', which are rotatably connected via a pivot 250', allowing the foldable electronic device 100' to switch between an unfolded state and a folded state.

[0247] Antenna system 300' includes a first antenna 400' and a second antenna 500'. The first antenna 400' includes a first antenna radiator 410'. The first antenna radiator 410' includes a first end 411' and a second end 412', and has a first feed point 420' and a first ground point 430'. The first feed point 420' is located between the first end 411' and the second end 412' of the first antenna radiator 410', and is connected to a first radio frequency source 800' to receive the radio frequency signal output by the first radio frequency source 800'. The first ground point 430' is located between the first feed point 420' and the second end 412' of the first antenna radiator 410', and is connected to the floor 211' of the first device body 210'. The first antenna radiator 410' includes a first straight segment 413' and a second straight segment 414' perpendicularly connected to one end of the first straight segment 413' away from the virtual line O1. The free ends of the first straight segment 413' and the second straight segment 414' are respectively the second end 412' and the first end 411' of the first antenna radiator 410'. The first feed point 420' and the first ground point 430' are located in the first straight segment 413'. The first straight segment 413' is located outside the side edge (i.e., the left edge 212') of the floor 211' of the first device body 210' away from the pivot 250'.

[0248] The second antenna 500' includes a second antenna radiator 510', which is also located outside the side edge (i.e., left edge 212') of the floor 211' of the first device body 210', away from the pivot 250'. The second antenna radiator 510' includes a first end 511' and a second end 512', and has a second feed point 520' and a second ground point 530'. The second feed point 520' is located between the first end 511' and the second end 512' of the second antenna radiator 510', and is connected to the second RF source 810' to receive the RF signal output by the second RF source 810'. The second grounding point 530' is located between the second feed point 520' and the first end 511' of the second antenna radiator 510', and is connected to the floor 211' of the first device body 210'. The second antenna radiator 510' includes a first straight segment 513' and a second straight segment 514' perpendicularly connected to the end of the first straight segment 513' away from the virtual line O1. The free ends of the first straight segment 513' and the second straight segment 514' are the second end 512' and the first end 511' of the second antenna radiator 510', respectively. The virtual line O1 is perpendicular to the axis O2 of the rotation shaft 250'.

[0249] The full-wave electromagnetic simulation software HFSS was used to simulate... Figure 1a and Figure 1b The provided foldable electronic device 100' was simulated and analyzed, and the results were as follows: Figures 2 to 3b The effect curve shown is shown.

[0250] Get Figures 2 to 3b The simulation conditions for the curves shown are shown in Table 1 below (please refer to Table 1 for details). Figures 1a-1b (Understood)

[0251] Table 1

[0252]

[0253] Please see Figures 2 to 3b , Figure 2 The simulation curves show the ECC parameter performance between the first and second antennas when the foldable electronic device is in both unfolded and folded states. The operating frequency range of the first and second antennas is 0.7 GHz to 0.96 GHz. Figure 3a Simulation results of the radiation efficiency and system efficiency of the first antenna when the foldable electronic device is in both the unfolded and folded states. Figure 3b Simulation results of the radiation efficiency and system efficiency of the second antenna when the foldable electronic device is in both the unfolded and folded states.

[0254] like Figure 2 As shown, when the operating frequency of the first and second antennas of the foldable electronic device is 0.76 GHz, the ECC between the first and second antennas in the folded state is 0.406, and the ECC between the first and second antennas in the unfolded state is 0.034. This means that the ECC between the first and second antennas in the folded state is higher than that in the unfolded state (i.e., the ECC deteriorates to some extent). Therefore, it can be concluded that the foldable electronic device degrades the ECC of a pair of antennas operating at the same frequency when in the folded state compared to the unfolded state.

[0255] Combination Figure 3a and Figure 3b ,from Figure 3a and Figure 3b It can be seen that when the operating frequencies of the first and second antennas of the foldable electronic device are 0.76 GHz, the radiation efficiency of the first antenna in the folded state is -4 dB, and the system efficiency is -4.6 dB. In the unfolded state, the radiation efficiency of the first antenna is -2.3 dB, and the system efficiency is -3.2 dB. Therefore, compared to the unfolded state, at an operating frequency of 0.76 GHz, the radiation efficiency of the first antenna decreases by 1.7 dB in the folded state, and the system efficiency decreases by 1.4 dB.

[0256] The second antenna has a radiative efficiency of -3.9 dB and a system efficiency of -4 dB in its folded state, and a radiative efficiency of -2 dB and a system efficiency of -2.5 dB in its unfolded state. Therefore, compared to its unfolded state, the radiative efficiency of the second antenna decreases by 1.9 dB and the system efficiency decreases by 1.5 dB at an operating frequency of 0.76 GHz in the folded state.

[0257] Therefore, it can be seen that when foldable electronic devices are in a folded state, the efficiency of a pair of antennas operating at the same frequency deteriorates compared to when they are unfolded.

[0258] The technical solutions described in Embodiments 1, 2 and 3 of this application further improve the envelope correlation coefficient between the first antenna and the second antenna, as well as the efficiency of the first antenna and the second antenna.

[0259] Example 1

[0260] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of the first embodiment of the foldable electronic device of Embodiment 1 of this application in its unfolded state. Figure 4 As shown, Embodiment 1 of this application provides a foldable electronic device 100, which includes a device body 200 and an antenna system 300. In this embodiment, the foldable electronic device 100 is illustrated by way of a foldable smartphone. Of course, those skilled in the art will understand that in other alternative embodiments, the foldable electronic device 100 may also be a foldable tablet computer or a foldable smartwatch, or other foldable electronic devices, and this does not limit the scope of protection of this application.

[0261] The device body 200 includes a first device body 210 and a second device body 220, which are rotatably connected by a pivot 250, allowing the foldable electronic device 100 to switch between an unfolded state and a folded state. In this embodiment, the first device body 210 is the device body on the side where the main screen of the foldable electronic device 100 is located, and the second device body 220 is the device body on the side where the secondary screen of the foldable electronic device 100 is located. In alternative embodiments, the first device body 210 may also be the device body on the side where the secondary screen of the foldable electronic device 100 is located, and the second device body 220 may be the device body on the side where the main screen of the foldable electronic device 100 is located; this does not limit the scope of protection of this application.

[0262] Furthermore, in this embodiment, the direction of the axis O2 of the pivot 250 is parallel to the longitudinal direction L of the foldable electronic device 100, meaning the foldable electronic device 100 can fold left and right. Of course, those skilled in the art will understand that in other alternative embodiments, the direction of the axis O2 of the pivot 250 can also be parallel to the transverse direction T of the foldable electronic device 100, meaning the foldable electronic device 100 can fold up and down, and this does not limit the scope of protection of this application.

[0263] like Figure 4 As shown, the antenna system 300 includes a first antenna 400 and a second antenna 500. The first antenna 400 includes a strip-shaped first antenna radiator 410. The second antenna 500 includes a strip-shaped second antenna radiator 510. The first antenna radiator 410 is located on one side of a virtual line O1 (i.e., below the virtual line O1), and the second antenna radiator 510 is located on the opposite side of the virtual line O1 (i.e., above the virtual line O1). The virtual line O1 is perpendicular to the axis O2 of the rotation shaft 250.

[0264] In this embodiment, the virtual line O1 is the center line of the device body 200 or parallel to the center line of the device body 200, and the center line of the device body 200 is perpendicular to the axis O2 of the rotating shaft 250.

[0265] In this embodiment, the floor 211 of the first device body and the floor 221 of the second device body are symmetrical about the pivot 250, and the structure and size of the floor 211 of the first device body and the floor 221 of the second device body are the same.

[0266] It should be noted that those skilled in the art will understand that the structure and size of the floor 211 of the first equipment body and the floor 221 of the second equipment body may be different, and can be set according to actual needs. This does not limit the scope of protection of this application.

[0267] In this embodiment, the floor 211 of the first device body and the floor 221 of the second device body are rectangular plate structures. It should be noted that those skilled in the art will understand that the floor 211 of the first device body and the floor 221 of the second device body can also be other suitable shapes.

[0268] Furthermore, the floor 211 of the first device body and the floor 221 of the second device body can be formed from the base plate of the mid-frame of the foldable electronic device 100 (i.e., the foldable smartphone). Those skilled in the art will understand that, in alternative embodiments, the floor 211 of the first device body and the floor 221 of the second device body can also be constructed from other metal parts, such as printed circuit boards.

[0269] In addition, the antenna system 300 also includes a strip-shaped first parasitic radiator 600 disposed corresponding to the position of the first antenna radiator 410. The first parasitic radiator 600 and the first antenna radiator 410 are located in different equipment bodies within the first equipment body 210 and the second equipment body 220, respectively. The first parasitic radiator 600 is electrically connected to the ground of the equipment body in which it is located; specifically, the first parasitic radiator 600 is electrically connected to the floor of the equipment body in which it is located. Those skilled in the art will understand that the floor is a type of ground; in this embodiment, the floor is used as an example to illustrate the ground.

[0270] In this embodiment, the first antenna radiator 410 and the second antenna radiator 510 are disposed on the first device body 210, and the first parasitic radiator 600 is disposed on the second device body 220. The first parasitic radiator 600 is connected to the floor 221 of the second device body. Of course, those skilled in the art will understand that in alternative embodiments, the first antenna radiator 410 and the second antenna radiator 510 may also be disposed on different device bodies. For example, the first antenna radiator 410 may be disposed on the first device body 210, and the second antenna radiator 510 and the first parasitic radiator 600 may be disposed on the second device body 220; or, the first antenna radiator 410 may be disposed on the second device body 220, and the second antenna radiator 510 and the first parasitic radiator 600 may be disposed on the first device body 210. This does not limit the scope of protection of this application.

[0271] Furthermore, such as Figure 4As shown, at least a portion of the first antenna radiator 410 and at least a portion of the second antenna radiator 510 are respectively located outside the side edge of the floor of the device body away from the pivot 250, and are respectively disposed opposite to that side edge of the floor of the device body. In this embodiment, at least a portion of the first antenna radiator 410 is located outside the side edge of the floor 211 of the first device body away from the pivot 250, and is disposed opposite to that side edge of the floor 211 of the first device body. That is, at least a portion of the first antenna radiator 410 is located outside the left side edge 212 of the floor 211 of the first device body, and is disposed opposite to that left side edge 212 of the floor 211 of the first device body. At least a portion of the second antenna radiator 510 is located outside the side edge of the floor 211 of the first device body away from the pivot 250, and is disposed opposite to that side edge of the floor 211 of the first device body. At least a portion of the second antenna radiator 510 is located outside the left edge 212 of the floor 211 of the first device body and is disposed opposite to the left edge 212 of the floor 211 of the first device body. The left edge 212 of the floor 211 of the first device body extends along the longitudinal direction L of the foldable electronic device 100. The first antenna radiator 410 is located below the virtual line O1, and the second antenna radiator 510 is located above the virtual line O1.

[0272] When the foldable electronic device 100 is in a folded state, viewed from the thickness direction of the foldable electronic device 100, the first antenna radiator 410 is spaced apart from the corresponding first parasitic radiator 600, and at least a portion of the first antenna radiator 410 overlaps with at least a portion of the first parasitic radiator 600, so that the first antenna radiator 410 is coupled to the corresponding first parasitic radiator 600.

[0273] By setting a first parasitic radiator 600 that corresponds to and at least partially overlaps with the first antenna radiator 410 in the folded state, the pair of antennas, the first antenna 400 and the second antenna 500, can still work independently and normally when the foldable electronic device 100 is in the folded state, even when the two antennas of the pair are close to each other and have a low envelope correlation coefficient (i.e., ECC). Furthermore, the first antenna 400 of the pair of antennas has high antenna efficiency, thus improving the antenna performance of the foldable electronic device 100 in the folded state.

[0274] like Figure 4As shown, the first antenna radiator 410 includes a first end 411 and a second end 412. The second end 412 of the first antenna radiator 410 is closer to the virtual line O1 than the first end 411 of the first antenna radiator 410. The first antenna radiator 410 has a first feed point 420 and a first ground point 430. The first feed point 420 is located between the first end 411 and the second end 412 of the first antenna radiator 410 and is connected to the first radio frequency source 800 to receive the radio frequency signal output by the first radio frequency source 800. The first ground point 430 is located between the first feed point 420 and the second end 412 of the first antenna radiator 410. The first ground point 430 of the first antenna radiator 410 is connected to the floor of the device body on which the first antenna radiator 410 is located, that is, the first ground point 430 of the first antenna radiator 410 is connected to the floor 211 of the first device body. Of course, those skilled in the art will understand that, in alternative embodiments, the first feed point 420 may also be located at the first end 411 of the first antenna radiator 410; and the first ground point 430 may also be located at the second end 412 of the first antenna radiator 410.

[0275] Furthermore, in the direction of axis O2 parallel to the rotation axis 250, the first grounding point 430 is closer to the virtual line O1 relative to the first feed point 420, and the second end 412 of the first antenna radiator 410 is closer to the virtual line O1 relative to the first end 411 of the first antenna radiator 410.

[0276] Furthermore, the first antenna radiator 410 is L-shaped and located at the first corner of the first conductive frame of the first device body 210. The first corner corresponds to the first diagonal 215 of the floor 211 of the first device body 210, that is, it is located near the first diagonal 215 of the floor 211. The first antenna radiator 410 includes a first straight segment 413 and a second straight segment 414 perpendicularly connected to the end of the first straight segment 413 away from the virtual line O1. The free ends of the first straight segment 413 and the second straight segment 414 are the second end 412 and the first end 411 of the first antenna radiator 410, respectively. The first straight segment 413 is positioned opposite to the side edge of the floor of the device body where the first antenna radiator 410 is located, that is, the first straight segment 413 is positioned opposite to the left edge 212 of the floor 211 of the first device body. The second straight segment 414 is located outside the other side edge of the floor of the device body where the first antenna radiator 410 is located, intersecting with the side edge, and is positioned opposite to the other side edge of the floor. In other words, the second straight segment 414 is located outside the lower edge 214 of the floor 211 of the first equipment body and is positioned opposite to the lower edge 214 of the floor 211 of the first equipment body.

[0277] Furthermore, the first antenna radiator 410 is also located near a pair of corners away from the pivot 250 on the floor of the device body where the first antenna radiator 410 is located, and extends along the corner edge of the opposite corner of the floor. That is, the first antenna radiator 410 is also located near the first opposite corner 215 of the floor 211 of the first device body, and extends along the corner edge of the first opposite corner 215 of the floor 211 of the first device body.

[0278] Furthermore, the first straight segment 413 extends along the axis O2 parallel to the rotation shaft 250, and the second straight segment 414 extends along the axis O2 perpendicular to the rotation shaft 250. That is, the first straight segment 413 extends along the longitudinal direction L of the foldable electronic device 100, and the second straight segment 414 extends along the transverse direction T of the foldable electronic device 100. It should be noted that parallelism can be approximately parallel, including cases where a small angle is formed (which is negligible). In this embodiment, the direction parallel to the axis O2 of the rotation shaft 250 can have a certain permissible tilt deviation, for example, a deviation within 5°. The above description regarding parallelism applies throughout the entire scope of this application.

[0279] like Figure 4 As shown, both the first feed point 420 and the first ground point 430 are located on the first straight segment 413. The first ground point 430 is located near the second end 412 of the first antenna radiator 410. In one specific embodiment, the length of the first antenna radiator 410 located between the first ground point 430 and the second end 412 is 7.56 mm, the length of the first antenna radiator 410 located between the first ground point 430 and the first end 411 is 84.94 mm, and the length of the first antenna radiator 410 located between the first ground point 430 and the first feed point 420 is 24.7 mm. The length of the first straight segment 413 is greater than the length of the second straight segment 414; the length of the first straight segment 413 is 65 mm, and the length of the second straight segment 414 is 27.5 mm. In this embodiment, the length of the first antenna radiator 410 is approximately 1 / 4 of the operating wavelength of the first antenna.

[0280] Of course, those skilled in the art will understand that in alternative embodiments, the first power supply point 420 may also be located on the second straight segment 414, and the first grounding point 430 may also be located at other suitable locations, which does not limit the scope of protection of this application.

[0281] like Figure 4As shown, the second antenna radiator 510 includes a first end 511 and a second end 512. The second end 512 of the second antenna radiator 510 is closer to the virtual line O1 than the first end 511 of the second antenna radiator 510. The second antenna radiator 510 has a second feed point 520 and a second ground point 530. The second feed point 520 is located between the first end 511 and the second end 512 of the second antenna radiator 510 and is connected to the second RF source 810 to receive the RF signal output by the second RF source 810. The second ground point 530 is located between the second feed point 520 and the first end 511 of the second antenna radiator 510. The second ground point 530 of the second antenna radiator 510 is connected to the floor of the device body where the second antenna radiator 510 is located, that is, the second ground point 530 of the second antenna radiator 510 is connected to the floor 211 of the first device body. Of course, those skilled in the art will understand that, in alternative embodiments, the second feed point 520 may also be located at the second end 512 of the second antenna radiator 510; and the second ground point 530 may also be located at the first end 511 of the second antenna radiator 510.

[0282] Furthermore, in the direction of axis O2 parallel to the rotation axis 250, the second feed point 520 is closer to the virtual line O1 relative to the second ground point 530, and the second end 512 of the second antenna radiator 510 is closer to the virtual line O1 relative to the first end 511 of the second antenna radiator 510.

[0283] Furthermore, the second antenna radiator 510 is L-shaped and located at the second corner of the first conductive frame of the first device body 210. This second corner corresponds to the second diagonal 216 of the floor 211 of the first device body 210, meaning it is located near the second diagonal 216 of the floor 211. The second antenna radiator 510 includes a first straight segment 513 and a second straight segment 514 perpendicularly connected to the end of the first straight segment 513 furthest from the virtual line O1. The free ends of the first straight segment 513 and the second straight segment 514 are respectively the second end 512 and the first end 511 of the second antenna radiator 510. The first straight segment 513 is positioned opposite to the side edge of the floor of the device body where the second antenna radiator 510 is located, specifically opposite to the left edge 212 of the floor 211 of the first device body. The second straight segment 514 is located outside the other side edge of the floor of the device body where the second antenna radiator 510 is located, intersecting with this side edge, and is positioned opposite to this other side edge of the floor. In other words, the second straight segment 514 is located outside the upper edge 213 of the floor 211 of the first equipment body and is positioned opposite to the upper edge 213 of the floor 211 of the first equipment body.

[0284] Furthermore, the second antenna radiator 510 is also located near a pair of corners away from the pivot axis 250 on the floor of the device body where the second antenna radiator 510 is located, and extends along the corner edge of that corner. That is, the second antenna radiator 510 is also located near a second corner 216 on the floor 211 of the first device body, and extends along the corner edge of the second corner 216 on the floor 211 of the first device body.

[0285] Furthermore, the first straight segment 513 extends along the axis O2 parallel to the rotation shaft 250, and the second straight segment 514 extends along the axis O2 perpendicular to the rotation shaft 250. That is, the first straight segment 513 extends along the longitudinal direction L of the foldable electronic device 100, and the second straight segment 514 extends along the transverse direction T of the foldable electronic device 100. It should be noted that perpendicularity can be approximately perpendicular, including cases with small deviations (which are negligible). In this embodiment, the direction perpendicular to the axis O2 of the rotation shaft 250 can have a certain permissible angular deviation, for example, a deviation within 5°. The above description regarding perpendicularity applies throughout the entire scope of this application.

[0286] Furthermore, the second grounding point 530 of the second antenna radiator 510 is located near the first end 511 of the second antenna radiator 510, and the second feed point 520 is located near the second end 512 of the second antenna radiator 510. In one specific embodiment, the length of the second antenna radiator 510 located between the second grounding point 530 and the second end 512 is 38.09 mm; the length of the second antenna radiator 510 located between the second grounding point 530 and the second feed point 520 is 27.39 mm.

[0287] Furthermore, the second feed point 520 is located on the first straight segment 513, and the second grounding point 530 is located on the second straight segment 514. In one specific embodiment, the length of the first straight segment 513 is 30.2 mm, and the length of the second straight segment 514 is 13.68 mm. The length of the second antenna radiator 510, located between the second grounding point 530 and the first end 511, is 4.65 mm.

[0288] In this embodiment, the second antenna 500 is a left-handed antenna, wherein the length of the second antenna radiator 510 located between the second grounding point 530 and the second end 512 is between 1 / 8 and 1 / 4 of the operating wavelength of the second antenna.

[0289] Of course, those skilled in the art will understand that in alternative embodiments, the second grounding point 530 may also be located at a suitable position on the first straight segment 513, and the second power supply point 520 may also be located at other suitable positions, which does not limit the scope of protection of this application.

[0290] like Figure 4 As shown, the extending direction of at least a portion of the first antenna radiator 410 and the extending direction of at least a portion of the second antenna radiator 510 are on the same straight line. Furthermore, the at least a portion of the first antenna radiator 410 and the at least a portion of the second antenna radiator 510 extend along a direction parallel to the axis O2 of the rotation shaft 250. Of course, those skilled in the art will understand that, in alternative embodiments, the extending directions of the at least a portion of the first antenna radiator 410 and the at least a portion of the second antenna radiator 510 may also be parallel to each other.

[0291] In this embodiment, the extension direction of the first straight segment 413 of the first antenna radiator 410 and the extension direction of the first straight segment of the second antenna radiator 510 are on the same straight line, and the extension direction of the second straight segment 414 of the first antenna radiator 410 and the extension direction of the second straight segment 514 of the second antenna radiator 510 are parallel to each other. Of course, those skilled in the art will understand that in alternative embodiments, the extension direction of the first straight segment 413 of the first antenna radiator 410 and the extension direction of the first straight segment of the second antenna radiator 510 are parallel to each other.

[0292] Furthermore, the operating frequency bands of the first antenna 400 and the second antenna 500 are the same or partially overlap. In this embodiment, the operating frequency range of the first antenna 400 is 0.7–0.96 GHz, and the operating frequency range of the second antenna 500 is also 0.7–0.96 GHz, meaning that the operating frequency bands of the first antenna 400 and the second antenna 500 are low-frequency. Those skilled in the art will understand that in alternative embodiments, the dimensions, feed points, and grounding points of the first antenna 400 and the second antenna 500 can be designed to allow the operating frequency bands of both antennas to be mid-to-high frequency.

[0293] Of course, those skilled in the art will understand that in other alternative embodiments, the first antenna radiator 410 and the second antenna radiator 510 may also adopt other shapes and structures, and are not limited to L-shapes. For example, the first antenna radiator 410 and / or the second antenna radiator 510 may be in the shape of a straight strip.

[0294] When the first antenna radiator 410 is in the shape of a straight strip, the first antenna radiator 410 extends in a straight line along the side edge of the floor of the main body of the equipment where the first antenna radiator 410 is located, that is, the first antenna radiator 410 extends in a straight line along the left edge 212 of the floor 211 of the main body of the equipment, and the first antenna radiator 410 extends in a direction parallel to the axis O2 of the rotating shaft 250.

[0295] When the second antenna radiator 510 is in the shape of a straight strip, the second antenna radiator 510 extends in a straight line along the side edge of the floor of the main body of the equipment where the second antenna radiator 510 is located, that is, the second antenna radiator 510 extends in a straight line along the left edge 212 of the floor 211 of the first equipment body, and the second antenna radiator 510 extends in a direction parallel to the axis O2 of the rotating shaft 250.

[0296] Those skilled in the art will understand that when both the first antenna radiator 410 and the second antenna radiator 510 are straight strips, the extension directions of the first antenna radiator 410 and the second antenna radiator 510 are on the same straight line or parallel to each other. When the first antenna radiator 410 is straight strips and the second antenna radiator 510 is L-shaped, the extension directions of the first antenna radiator 410 and the first straight segment 513 of the second antenna radiator 510 are on the same straight line or parallel to each other. When the first antenna radiator 410 is L-shaped and the second antenna radiator 510 is straight strips, the extension directions of the first straight segment 413 of the first antenna radiator 410 and the second antenna radiator 510 are on the same straight line or parallel to each other.

[0297] like Figure 4 As shown, the first parasitic radiator 600 includes a first end 640 and a second end 650. The second end 650 of the first parasitic radiator 600 is closer to the virtual line O1 than the first end 640. The first parasitic radiator 600 has a first parasitic grounding point 610, which is located between the first end 640 and the second end 650 of the first parasitic radiator 600. The first parasitic grounding point 610 is connected to the floor of the equipment body on which the first parasitic radiator 600 is located, that is, the first parasitic grounding point 610 of the first parasitic radiator 600 is connected to the floor 221 of the second equipment body. Of course, those skilled in the art will understand that, in alternative embodiments, the first parasitic grounding point 610 may also be located at either the first end 640 or the second end 650 of the first parasitic radiator 600.

[0298] Furthermore, at least a portion of the first parasitic radiator 600 is located outside the side edge of the floor of the device body located away from the pivot 250, and is disposed opposite to that side edge of the floor of the device body. That is, at least a portion of the first parasitic radiator 600 is located outside the right edge 222 of the floor 221 of the second device body, and is disposed opposite to that right edge 222 of the floor 221 of the second device body. The right edge 222 of the floor 221 of the second device body extends along the longitudinal direction L of the foldable electronic device 100. The first parasitic radiator 600 is located below the virtual line O1.

[0299] Furthermore, in the direction of axis O2 parallel to the rotation axis 250, the second end 650 of the first parasitic radiator 600 is closer to the virtual line O1 than the first end 640 of the first parasitic radiator 600.

[0300] Furthermore, the first parasitic radiator 600 is L-shaped and located at the first corner of the second conductive frame of the second device body 220. The first corner of the second conductive frame corresponds to the first diagonal 225 of the floor 221 of the second device body 220, that is, it is located near the first diagonal 225 of the floor 221. When the foldable electronic device is in a folded state, the first corner of the second conductive frame overlaps with the first corner of the first conductive frame in the thickness direction of the foldable electronic device. The first parasitic radiator 600 includes a first straight segment 620 and a second straight segment 630 perpendicularly connected to the end of the first straight segment 620 away from the virtual line O1. The free end of the first straight segment 620 and the free end of the second straight segment 630 are the second end 650 and the first end 640 of the first parasitic radiator 600, respectively. The first straight segment 620 is positioned opposite to the side edge of the floor of the device body where the first parasitic radiator 600 is located, that is, the first straight segment 620 is positioned opposite to the right edge 222 of the floor 221 of the second device body. The second straight segment 630 is located outside the other edge of the floor of the main body of the equipment where the first parasitic radiator 600 is located, intersecting with the first side edge, and is positioned opposite to the other side edge of the floor. That is, the second straight segment 630 is located outside the lower edge 224 of the floor 221 of the second main body of the equipment, and is positioned opposite to the lower edge 224 of the floor 221 of the second main body of the equipment.

[0301] Furthermore, the first parasitic radiator 600 is also located near a pair of corners of the floor of the device body where the first parasitic radiator 600 is located, away from the pivot 250, and extends along the corner edge of that corner. That is, the first parasitic radiator 600 is also located near a first corner 225 of the floor 221 of the second device body, and extends along the corner edge of the first corner 225 of the floor 221 of the second device body.

[0302] Furthermore, the first straight segment 620 extends along the axis O2 parallel to the rotation shaft 250, and the second straight segment 630 extends along the axis O2 perpendicular to the rotation shaft 250. That is, the first straight segment 620 extends along the longitudinal direction L of the foldable electronic device 100, and the second straight segment 630 extends along the transverse direction T of the foldable electronic device 100.

[0303] like Figure 4As shown, the first parasitic grounding point 610 is located at the middle of the first parasitic radiator 600 along its length. This ensures both the efficiency of the first antenna 400 and the envelope correlation coefficient (ECC) between the first antenna 400 and the second antenna 500. Of course, those skilled in the art will understand that in alternative embodiments, the first parasitic grounding point 610 can also be located at other suitable positions on the first parasitic radiator 600. Specifically, the closer the first parasitic grounding point 610 is to the first end 640 of the first parasitic radiator 600, the better the efficiency of the first antenna 400; and the closer the first parasitic grounding point 610 is to the second end 650 of the first parasitic radiator 600, the lower the envelope correlation coefficient between the first antenna 400 and the second antenna 500.

[0304] Furthermore, the first parasitic grounding point 610 is located on the first straight segment 620. The length of the first parasitic radiator 600 located between the first parasitic grounding point 610 and the second end 650 is 37 mm, and the length of the first parasitic radiator 600 located between the first parasitic grounding point 610 and the first end 640 is 52.4 mm. The length of the first straight segment 620 is greater than the length of the second straight segment 630. The length of the first straight segment 620 is 65 mm, and the length of the second straight segment 630 is 27.5 mm. In this embodiment, the length of the first parasitic radiator 600 is 1 / 4 to 1 / 2 times the operating wavelength of the first antenna.

[0305] Furthermore, the extension direction of at least a portion of the first parasitic radiator 600 is parallel to the extension direction of at least a portion of the first antenna radiator 410. In this embodiment, the extension direction of the first straight segment 620 of the first antenna radiator 410 is parallel to the extension direction of the first straight segment 620 of the first parasitic radiator 600, and the extension direction of the second straight segment 414 of the first antenna radiator 410 is parallel to the extension direction of the second straight segment 630 of the first parasitic radiator 600.

[0306] Furthermore, when the foldable electronic device 100 is in a folded state, the first end 640 of the first parasitic radiator 600 is close to the first end 411 of the first antenna radiator 410, and the second end 650 of the first parasitic radiator 600 is close to the second end 412 of the first antenna radiator 410. Moreover, when the foldable electronic device 100 is in a folded state, viewed from the thickness direction of the foldable electronic device 100, the first parasitic radiator 600 substantially overlaps with the first antenna radiator 410.

[0307] Of course, those skilled in the art will understand that in other alternative embodiments, the first parasitic radiator 600 may also take other shapes and is not limited to an L-shape. For example, the first parasitic radiator 600 may be in the shape of a straight strip.

[0308] Specifically, when the first parasitic radiator 600 is straight, it extends in a straight line along the side edge of the floor of the equipment body where it is located. That is, the first parasitic radiator 600 extends in a straight line along the right edge 222 of the floor 221 of the second equipment body, and extends in a direction parallel to the axis O2 of the rotation shaft 250.

[0309] Those skilled in the art will understand that when both the first antenna radiator 410 and the first parasitic radiator 600 are straight strips, the extension direction of the first antenna radiator 410 is parallel to the extension direction of the first parasitic radiator 600. When the first antenna radiator 410 is straight strips and the first parasitic radiator 600 is L-shaped, the extension direction of the first antenna radiator 410 is parallel to the extension direction of the first straight segment of the first parasitic radiator 600. When the first antenna radiator 410 is L-shaped and the first parasitic radiator 600 is straight strips, the extension direction of the first straight segment 413 of the first antenna radiator 410 is parallel to the extension direction of the first parasitic radiator 600.

[0310] In this embodiment, the first antenna radiator 410, the second antenna radiator 510, and the first parasitic radiator 600 are formed by the conductive frame of the foldable electronic device 100. Specifically, the first antenna radiator 410 and the second antenna radiator 510 are formed by the first conductive frame of the first device body 210, and the first parasitic radiator 600 is formed by the second conductive frame of the second device body 220. Of course, those skilled in the art will understand that in alternative embodiments, the first antenna radiator 410, the second antenna radiator 510, the first parasitic radiator 600, and the second parasitic radiator may also be patch structures, which are attached to the surface of the conductive frame of the foldable electronic device 100 and made of conductive material. The first antenna radiator 410, the second antenna radiator 510, the first parasitic radiator 600, and the second parasitic radiator may also be transparent antennas embedded inside the screen of the foldable electronic device 100. The first antenna radiator 410, the second antenna radiator 510, the first parasitic radiator 600, and the second parasitic radiator can also adopt a patch structure. The patch structure is attached to the back cover of the foldable electronic device 100 and is made of conductive material.

[0311] Please see Figure 5 , Figure 5This is a schematic diagram of the structure of the second embodiment of the foldable electronic device of Embodiment 1 of this application in the unfolded state.

[0312] like Figure 5 As shown, the structure of the foldable electronic device 100A provided in the second embodiment is basically the same as that of the foldable electronic device 100 provided in the first embodiment. That is, the foldable electronic device 100A also includes a device body 200A and an antenna system 300A. The device body 200A also includes a first device body 210A and a second device body 220A rotatably connected by a pivot 250A. Both the first device body 210A and the second device body 220A have a floor. The antenna system 300A also includes a first antenna 400A, a second antenna 500A, and a first antenna 400A. The first antenna 400A includes a first antenna radiator 410A, which has a first end 411A and a second end 412A, and has a first feed point 420A and a first ground point 430A. The first feed point 420A is located between the first end 411A and the second end 412A of the first antenna radiator 410A, and is connected to the first radio frequency source 800A to receive the radio frequency signal output by the first radio frequency source 800A. The first ground point 430A is located between the first feed point 420A and the first antenna radiator 410A. The second antenna 500A is located between the second ends 412A of the radiator 410A and connected to the floor 211A of the first device body 210A; the second antenna 500A includes a second antenna radiator 510A, which includes a first end 511A and a second end 512A, and has a second feed point 520A and a second ground point 530A. The second feed point 520A is located between the first end 511A of the second antenna radiator 510A and the second end 512A of the second antenna radiator 510A, and is connected to the second radio frequency source 810A to receive the output of the second radio frequency source 810A. The radio frequency signal has a second ground point 530A located between the second feed point 520A and the first end 511A of the second antenna radiator 510A, and connected to the floor 211A of the first device body 210A. The first parasitic radiator 600A includes a first end 640A and a second end 650A, and has a first parasitic ground point 610A connected to the floor 221A of the second device body 220A. When the foldable electronic device 100A is in a folded state, the first parasitic radiator 600A and the first antenna radiator 410A at least partially overlap. The structure of the foldable electronic device 100A provided in this second embodiment differs from that provided in the first embodiment in that the first parasitic ground point 610A is located near the second end 650A of the first parasitic radiator 600A. This results in a lower envelope correlation coefficient (ECC) between the first antenna 400A and the second antenna 500A.

[0313] Furthermore, the first parasitic grounding point 610A is located on the first straight segment 620A. The length of the first parasitic radiator 600A located between the first parasitic grounding point 610A and the second end 650A is 18.11 mm. In this embodiment, the length of the first parasitic radiator 600A located between the first parasitic grounding point 610A and the first end 640A is 71.5 mm. The length of the first straight segment 620A is greater than the length of the second straight segment 630A; the length of the first straight segment 620A is 65 mm, and the length of the second straight segment 630A is 27.5 mm. In this embodiment, the length of the first parasitic radiator 600A located between the first parasitic grounding point 610A and the first end 640A is 1 / 4 of the operating wavelength of the first antenna.

[0314] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of the third embodiment of the foldable electronic device of Embodiment 1 of this application in the unfolded state.

[0315] like Figure 6As shown, the structure of the foldable electronic device 100B provided in the third embodiment is basically the same as that of the foldable electronic device 100 provided in the first embodiment. That is, the foldable electronic device 100B also includes a device body 200B and an antenna system 300B. The device body 200B also includes a first device body 210B and a second device body 220B rotatably connected by a pivot 250B. Both the first device body 210B and the second device body 220B have a floor. The antenna system 300B also includes a first antenna 400B, a second antenna 500B, and a first antenna 400B. The first antenna 400B includes a first antenna radiator 410B, which has a first end 411B and a second end 412B, and has a first feed point 420B and a first ground point 430B. The first feed point 420B is located between the first end 411B and the second end 412B of the first antenna radiator 410B, and is connected to the first radio frequency source 800B to receive the radio frequency signal output by the first radio frequency source 800B. The first ground point 430B is located between the first feed point 420B and the first antenna radiator 410B. The second antenna 500B is located between the second ends 412B of the radiator 410B and connected to the floor 211B of the first device body 210B; the second antenna 500B includes a second antenna radiator 510B, which includes a first end 511B and a second end 512B, and has a second feed point 520B and a second ground point 530B. The second feed point 520B is located between the first end 511B of the second antenna radiator 510B and the second end 512B of the second antenna radiator 510B, and is connected to the second radio frequency source 810B to receive the output of the second radio frequency source 810B. The radio frequency signal has a second grounding point 530B located between the second feed point 520B and the first end 511B of the second antenna radiator 510B, and connected to the floor 211B of the first device body 210B. The first parasitic radiator 600B includes a first end 640B and a second end 650B, and has a first parasitic grounding point 610B connected to the floor 221B of the second device body 220B. When the foldable electronic device 100B is in a folded state, the first parasitic radiator 600B and the first antenna radiator 410B at least partially overlap. The structure of the foldable electronic device 100B provided in this third embodiment differs from that of the foldable electronic device 100A provided in the first embodiment in that the first parasitic grounding point 610B is located near the first end 640B of the first parasitic radiator 600B. This improves the efficiency of the first antenna 400B.

[0316] Furthermore, the first parasitic grounding point 610B is located on the second straight segment 630B. The length of the first parasitic radiator 600B located between the first parasitic grounding point 610B and the first end 640B is 16.8 mm, and the length of the first parasitic radiator 600B located between the first parasitic grounding point 610B and the second end 650B is 75 mm. The length of the first straight segment 620B is greater than the length of the second straight segment 630B. The length of the first straight segment 620B is 65 mm, and the length of the second straight segment 630B is 27.5 mm. In this embodiment, the length of the first parasitic radiator 600B located between the first parasitic grounding point 610B and the second end 650B is 1 / 4 of the operating wavelength of the first antenna.

[0317] Please see Figure 7 , Figure 7 This is a structural schematic diagram of the fourth embodiment of the foldable electronic device of Embodiment 1 of this application in the unfolded state.

[0318] like Figure 7 As shown, the structure of the foldable electronic device 100C provided in this fourth embodiment is basically the same as that of the foldable electronic device 100 provided in the first embodiment. The difference is that the second antenna radiator 510C of the second antenna 500C is in the shape of a straight strip. The second antenna radiator 510C extends in a straight line along the side edge of the floor of the device body where the second antenna radiator 510C is located, that is, the second antenna radiator 510C extends in a straight line along the left edge 212C of the floor 211C of the first device body 210C, and the second antenna radiator 510C extends in a direction parallel to the axis O2 of the rotation shaft 250C.

[0319] Please see Figure 8 , Figure 8 This is a structural schematic diagram of the fifth embodiment of the foldable electronic device 100D of Embodiment 1 of this application in the unfolded state.

[0320] like Figure 8 As shown, the structure of the foldable electronic device 100D provided in the fifth embodiment is basically the same as that of the foldable electronic device 100 provided in the first embodiment. The difference is that the first grounding point 430D is located in the middle of the first straight line segment 413D of the first antenna radiator 410D.

[0321] Furthermore, the length of the first antenna radiator 410D located between the first grounding point 430D and the second end 412D is 29.4 mm; the length of the first antenna radiator 410D located between the first grounding point 430D and the first end 411D is 61.6 mm; and the length of the first antenna radiator 410D located between the first grounding point 430D and the first feed point 420D is 14 mm. The length of the first straight segment 413D is greater than the length of the second straight segment 414D, with the first straight segment 413D having a length of 64 mm and the second straight segment 414D having a length of 27 mm. In this embodiment, the length of the first antenna radiator 410D located between the first grounding point 430D and the first end 411D is 1 / 4 of the operating wavelength of the first antenna.

[0322] To illustrate the function of the technical solution protected in this application, Figures 9-15b A schematic diagram of the first reference design of the antenna element is given, along with simulation curves comparing the antenna performance of the first, second, and third embodiments of Embodiment 1 of this application with that of the first reference design.

[0323] Please see Figure 9 , Figure 9 This is a schematic diagram of the unfolded state of the foldable electronic device 100A', which is the first reference design. Figure 9 As shown, combined with Figures 4-6 It is understood that the foldable electronic device 100A' of the first reference design is based on the structure of the foldable electronic device provided in the first, second, and third embodiments of Embodiment 1 of this application, with the first parasitic radiator 600A' suspended relative to the floor 221A' of the second device body 220A' without a grounding point, that is, the first parasitic radiator 600A' is not connected to the floor of the second device body, and the first parasitic radiator is not grounded. Other structures and parameters remain unchanged.

[0324] The foldable electronic device provided in the first, second, and third embodiments of this example, as well as the first reference design, was simulated and analyzed using the full-wave electromagnetic simulation software HFSS, and the results were obtained as follows: Figures 10a to 15b The effect curve shown is shown.

[0325] Get Figures 10a to 15b The simulation conditions for the curves shown are shown in Table 2 below (please refer to the table below). Figures 4-6 as well as Figure 9 (Understood)

[0326] Table 2

[0327]

[0328]

[0329]

[0330] As shown in Table 3, Table 3 presents a comparison of the envelope correlation coefficients between the first and second antennas when the foldable electronic device of the first embodiment, second embodiment, third embodiment, and first reference design is in a folded state. Specifically, the envelope correlation coefficients (ECCs) between the first and second antennas of the four structural designs were obtained at the operating frequencies of the first antenna: 0.71 GHz, 0.72 GHz, 0.73 GHz, 0.74 GHz, 0.75 GHz, 0.76 GHz, 0.77 GHz, and 0.78 GHz. Furthermore, the main resonant frequency of the first antenna is 0.76 GHz, meaning the resonant frequency of the resonance generated by the first antenna radiator itself is 0.76 GHz.

[0331] Table 3

[0332]

[0333] As shown in Table 3, when the operating frequency range of the first antenna is 0.71GHz to 0.76GHz, the ECC between the first antenna and the second antenna in the first reference design, the first embodiment, and the second embodiment is all below 0.5. However, for the third embodiment, when the operating frequency of the first antenna is 0.71GHz and 0.72GHz, the ECC between the first antenna and the second antenna is above 0.5. When the operating frequency range is 0.73GHz to 0.76GHz, the ECC between the first antenna and the second antenna remains below 0.5.

[0334] Therefore, it can be seen that in the first reference design (i.e., the scheme where the first parasitic radiator does not exert a parasitic radiation effect on the first antenna radiator), the ECC between the first and second antennas can fully meet the requirements for normal operation of both antennas. Furthermore, in the first and second embodiments, the ECC between the first and second antennas can also fully meet the requirements for normal operation of both antennas. Specifically, in the first embodiment, compared to the first reference design, the ECC between the first and second antennas is slightly deteriorated (i.e., the ECC is slightly increased). In the second embodiment, compared to the first reference design, the ECC between the first and second antennas is somewhat optimized (i.e., the ECC is decreased to some extent). In the third embodiment, compared to the first reference design, the ECC between the first and second antennas is deteriorated (i.e., the ECC is increased), but within the operating frequency range, it can still basically meet the requirements for normal operation of both antennas. Thus, it can be concluded that the closer the first parasitic grounding point is to the second end of the first parasitic radiator, the lower the envelope correlation coefficient between the first antenna and the second antenna.

[0335] In this application, when the first antenna operates at a frequency of 0.74 GHz, the ECC between the first and second antennas in the first reference design is 0.27. In the first embodiment of this application, the ECC between the first and second antennas is 0.29. In the second embodiment of this application, the ECC between the first and second antennas is 0.21. In the third embodiment of this application, the ECC between the first and second antennas is 0.45. Therefore, when the first antenna operates at a frequency of 0.74 GHz, compared to the first reference design, the first embodiment of this application shows a slight deterioration of 0.02 in the ECC between the first and second antennas (0.02). Compared to the first reference design, the second embodiment of this application shows an improvement of 0.06 in the ECC between the first and second antennas (0.06). Compared to the first reference design, the third embodiment of this application shows a deterioration of 0.18 in the ECC between the first and second antennas (0.18). In other words, the second embodiment of this application shows the best ECC between the first and second antennas, while the first embodiment shows the second best.

[0336] It should be noted that those skilled in the art will understand that when the envelope correlation coefficient (ECC) between the first antenna and the second antenna is less than 0.5 within the operating frequency band, the first antenna and the second antenna can function normally.

[0337] Please see Figures 10a-10c , Figure 10a This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the first embodiment of this application and the first reference design when the foldable electronic device is in the folded state. Figure 10b This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the second embodiment of Embodiment 1 of this application and the first reference design when the foldable electronic device is in the folded state. Figure 10c This is a simulation comparison of the radiation efficiency of the first antenna and the system efficiency of the foldable electronic device in the third embodiment of Embodiment 1 of this application and the first reference design when the foldable electronic device is in the folded state.

[0338] Radiation efficiency is a value that measures the antenna's radiation capability. Losses caused by metal and dielectric materials affect radiation efficiency. System efficiency is the actual efficiency after considering antenna port matching; that is, the antenna's system efficiency is the antenna's actual efficiency (i.e., overall efficiency). Those skilled in the art will understand that efficiency is generally expressed as a percentage, and there is a corresponding conversion relationship between it and dB; the closer the efficiency is to 0 dB, the better.

[0339] from Figure 10aIt can be seen that at an operating frequency of 0.74 GHz, the radiation efficiency of the first antenna in the first reference design is -5.884 dB, and the system efficiency is -6.7 dB. In the first embodiment of this application, the radiation efficiency of the first antenna is -4.9855 dB, and the system efficiency is -5.6 dB. Therefore, compared to the first reference design, the first embodiment of this application improves the radiation efficiency of the first antenna by 0.8985 dB and the system efficiency of the first antenna by 1.1 dB at an operating frequency of 0.74 GHz.

[0340] from Figure 10b It can be seen that at an operating frequency of 0.74 GHz, the radiation efficiency of the first antenna in the first reference design is -5.884 dB, and the system efficiency is -6.7 dB. In the second embodiment of this application, the radiation efficiency of the first antenna is -5.5359 dB, and the system efficiency is -6.1 dB. Therefore, compared to the first reference design, the second embodiment of this application improves the radiation efficiency of the first antenna by 0.3481 dB and the system efficiency of the first antenna by 0.6 dB at an operating frequency of 0.74 GHz.

[0341] from Figure 10c It can be seen that at an operating frequency of 0.74 GHz, the radiation efficiency of the first antenna in the first reference design is -5.884 dB, and the system efficiency is -6.7 dB. In the third embodiment of this application, the radiation efficiency of the first antenna is -3.637 dB, and the system efficiency is -4.6 dB. Therefore, compared to the first reference design, the third embodiment of this application improves the radiation efficiency of the first antenna by 2.247 dB and the system efficiency of the first antenna by 2.1 dB at an operating frequency of 0.74 GHz.

[0342] Therefore, it can be seen that the first embodiment, compared to the first reference design, has a certain degree of optimization in the radiation efficiency and system efficiency of the first antenna; the second embodiment, compared to the first reference design, has a slight optimization in the radiation efficiency and system efficiency of the first antenna; and the third embodiment, compared to the first reference design, has a more significant optimization in the radiation efficiency and system efficiency of the first antenna (i.e., a more significant improvement in resonant efficiency). Thus, it can be concluded that the closer the first parasitic grounding point is to the first end of the first parasitic radiator, the higher the radiation efficiency and system efficiency of the first antenna.

[0343] In this application, when the first antenna operates at a frequency of 0.74 GHz, compared to the first reference design, the first embodiment improves the radiation efficiency of the first antenna by 0.8985 dB (a certain degree of optimization) and the system efficiency by 1.087 dB (a certain degree of optimization). In the second embodiment, compared to the first reference design, the radiation efficiency of the first antenna improves by 0.3481 dB (a slight optimization) and the system efficiency by 0.614 dB (a slight optimization). In the third embodiment, compared to the first reference design, the radiation efficiency of the first antenna improves by 2.247 dB (a significant optimization) and the system efficiency by 2.092 dB (a significant optimization). In other words, the third embodiment exhibits the best radiation efficiency and system efficiency, while the first embodiment is second best.

[0344] Please see Figures 11a to 11d , Figures 11a to 11d This is a radiation pattern of the first antenna when the foldable electronic device of the first reference design, the first embodiment, the second embodiment, and the third embodiment of Embodiment 1 of this application are in a folded state. At this time, the operating frequency of the first antenna is 0.74 GHz. Wherein, when the foldable electronic device is in a folded state, the horizontal direction is the direction of the short side of the foldable electronic device, the vertical direction is the direction of the long side of the foldable electronic device, the direction perpendicular to the paper facing outwards is the direction of the back shell of the second device body, and the direction perpendicular to the paper facing inwards is the direction of the back shell of the first device body.

[0345] Please see Figures 11a to 11d The arrows indicate the direction of maximum radiation in the radiation pattern of the first traverse. From Figure 11a It can be seen that, for the first reference design, the maximum radiation direction of the first antenna is the lateral direction of the foldable electronic device, i.e. Figure 11a The middle level is facing to the right.

[0346] from Figure 11b As can be seen, in the first embodiment of this application, the maximum radiation direction of the first antenna is laterally biased towards the longitudinal direction of the foldable electronic device, that is... Figure 11b The radiation pattern is slightly upward and to the right of the central horizontal plane. In other words, in this embodiment, the first parasitic radiator slightly alters the radiation pattern of the first ray.

[0347] from Figure 11c As can be seen, in the second embodiment of this application, the maximum radiation direction of the first antenna is the lateral direction of the foldable electronic device, that is... Figure 11cThe radiation pattern is oriented to the right at a mid-level. In other words, in this embodiment, the first parasitic radiator does not alter the radiation pattern of the first radome.

[0348] from Figure 11d As can be seen, in the third embodiment of this application, the maximum radiation direction of the first antenna is the longitudinal direction of the foldable electronic device, that is... Figure 11d The direction is vertically upward. In other words, in this embodiment, the first parasitic radiator completely changes the radiation pattern of the first antenna, and the maximum radiation direction of the first antenna changes from horizontal to vertical.

[0349] As can be seen from the above, in various embodiments of this application, by introducing a first parasitic radiator, the radiation pattern of the first antenna and the maximum radiation direction of the first antenna can be changed, thereby improving the ECC between the first antenna and the second antenna, as well as the radiation efficiency of the first antenna and the system efficiency.

[0350] Please see Figure 12 , Figure 12 This is a schematic diagram of the current distribution structure near the first antenna when the foldable electronic device of the first reference design is in a folded state. Figure 12 The view shown is the view from one side of the main screen, which corresponds to the view from the left. Figure 9 The image shows a view from the lower left corner of the first device body after the second device body in the foldable electronic device is folded inward relative to the first device body. Figure 12 In the diagram, the solid white arrow indicates the direction of current on the first antenna radiator, and the dashed white arrow indicates the direction of current on the floor of the first device body where the first antenna radiator is located. For example... Figure 12 It can be seen that the current on the floor of the first device body, where the first antenna radiator is located, includes both horizontal and vertical currents, with the horizontal current being the predominant one. In other words, in this first reference design, the current on the floor corresponding to the first antenna is mainly horizontal, i.e., a horizontal mode. This also indirectly explains that the maximum radiation direction of the first antenna in the radiation pattern is horizontal.

[0351] Please see Figure 13a and Figure 13b , Figure 13a and Figure 13b This is a schematic diagram of the current distribution structure near the first antenna position of the foldable electronic device according to the first embodiment of this application when it is in a folded state. Figure 13a The view shown is the view from one side of the main screen (corresponding to) Figure 4 The second device body 220 in the foldable electronic device shown is viewed from the first diagonal 215 of the first device body 210 after it is folded inward relative to the first device body 210. Figure 13bThe view shown is the view from one side of the secondary screen (corresponding to...). Figure 4 The foldable electronic device shown is viewed from a first diagonal 225 of the second device body 220 after the first device body 210 is folded inward relative to the second device body 220. Figure 13a In the diagram, the solid white arrow indicates the direction of current on the first antenna radiator, and the dashed white arrow indicates the direction of current on the floor of the first device body where the first antenna radiator is located. Figure 13b In the diagram, the solid white arrow indicates the direction of the current on the first parasitic radiator, and the dashed white arrow indicates the direction of the current on the floor of the second device body where the first parasitic radiator is located.

[0352] from Figure 13a As can be seen from this, the current on the floor of the main body of the first equipment, where the first antenna radiator is located, includes both horizontal and vertical currents, with the horizontal current being the predominant one. From... Figure 13b As can be seen, the current on the floor of the second device body where the first parasitic radiator is located has both horizontal and vertical currents, and the intensity of the horizontal and vertical current distributions is relatively similar. That is, in this first embodiment, the introduction of the first parasitic radiator causes the direction of the current on the floor corresponding to the first antenna to be slightly biased horizontally towards the vertical direction, i.e., a slightly biased horizontal-to-vertical pattern. This also indirectly explains that in the radiation pattern of the first antenna in this first embodiment, the maximum radiation direction of the first antenna is biased horizontally towards the vertical direction.

[0353] Please see Figure 14a and Figure 14b , Figure 14a and Figure 14b This is a schematic diagram of the current distribution structure near the first antenna position in the second embodiment of Embodiment 1 of this application when the foldable electronic device is in a folded state. Figure 14a The view shown is the view from one side of the main screen (corresponding to) Figure 5 The image shows the view from the first diagonal of the first device body 210A after the second device body 220A is folded inward relative to the first device body 210A (i.e., the view from the lower left corner of the first device body 210A). Figure 14b The view shown is the view from one side of the secondary screen (corresponding to...). Figure 5 The image shows a view from the first diagonal of the second device body 220A after the first device body 210A is folded inward relative to the second device body 220A (i.e., the view from the lower right corner of the second device body 220A). Figure 14a In the diagram, the solid white arrow indicates the direction of current on the first antenna radiator, and the dashed white arrow indicates the direction of current on the floor of the first device body where the first antenna radiator is located. Figure 14bIn the diagram, the solid white arrow indicates the direction of the current on the first parasitic radiator, and the dashed white arrow indicates the direction of the current on the floor of the second device body where the first parasitic radiator is located.

[0354] from Figure 14a As can be seen from this, the current on the floor of the main body of the first equipment, where the first antenna radiator is located, includes both horizontal and vertical currents, with the horizontal current being the predominant one. From... Figure 14b As can be seen, the current on the floor of the second device body where the first parasitic radiator is located has both horizontal and vertical currents, with the horizontal current distribution intensity being slightly greater than the vertical current distribution intensity. In other words, in this second embodiment, after introducing the first parasitic radiator, the direction of the current on the floor corresponding to the first antenna remains horizontal, i.e., a horizontal mode. This also indirectly explains that the maximum radiation direction of the first antenna in the radiation pattern of the first antenna in this second embodiment is horizontal.

[0355] Please see Figure 15a and Figure 15b , Figure 15a and Figure 15b This is a schematic diagram of the current distribution structure near the first antenna position in the third embodiment of Embodiment 1 of this application when the foldable electronic device is in a folded state. Figure 15a The view shown is the view from one side of the main screen (corresponding to) Figure 6 The image shows the view from the first diagonal of the first device body 210B after the second device body 220B is folded inward relative to the first device body 210B (i.e., the view from the lower left corner of the first device body 210B). Figure 15b The view shown is the view from one side of the secondary screen (corresponding to...). Figure 6 The image shows a view from the first diagonal of the second device body 220B after the first device body 210B is folded inward relative to the second device body 220B (i.e., the view from the lower right corner of the second device body 220B). Figure 15a In the diagram, the solid white arrow indicates the direction of current on the first antenna radiator, and the dashed white arrow indicates the direction of current on the floor of the first device body where the first antenna radiator is located. Figure 15b In the diagram, the solid white arrow indicates the direction of the current on the first parasitic radiator, and the dashed white arrow indicates the direction of the current on the floor of the second device body where the first parasitic radiator is located.

[0356] from Figure 15a As can be seen from this, the current on the floor of the main body of the first equipment, where the first antenna radiator is located, includes both horizontal and vertical currents, with the horizontal current being the predominant one. From... Figure 15bAs can be seen from the diagram, the current on the floor of the second device body where the first parasitic radiator is located is mainly longitudinal. In other words, in this third embodiment, the introduction of the first parasitic radiator causes the direction of the current on the floor corresponding to the first antenna to be biased longitudinally, i.e., a longitudinal bias mode. This also indirectly explains that in the radiation pattern of the first antenna in this third embodiment, the maximum radiation direction of the first antenna is longitudinal.

[0357] As can be seen from the above comparison and analysis, the key to changing the radiation pattern of the first antenna in this application lies in the location of the first parasitic radiator and the first parasitic grounding point, as well as the distribution ratio of horizontal and vertical currents in the current distribution on the floor, thereby obtaining different radiation pattern representations.

[0358] Example 2

[0359] Please see Figure 16 , Figure 16 This is a schematic diagram of the structure of the first embodiment of the foldable electronic device of Embodiment 2 of this application in its unfolded state. Figure 16 As shown, the foldable electronic device 100E provided in this embodiment also includes a device body 200E and an antenna system 300E. The structure of the device body 200E can adopt the same structure as the structure of the device body of the foldable electronic device provided in Embodiment 1, while the structure of the antenna system 300E is different from the structure of the antenna system of the foldable electronic device provided in Embodiment 1.

[0360] like Figure 16 As shown, the device body 200E also includes a first device body 210E and a second device body 220E. The first device body 210E and the second device body 220E are rotatably connected by a pivot 250E, so that the foldable electronic device 100E can switch between an unfolded state and a folded state. The first device body 210E has a floor 211E, and the second device body 220E also has a floor 221E. In this embodiment, the direction of the axis O2 of the pivot 250E is parallel to the longitudinal direction L of the foldable electronic device 100E, that is, the foldable electronic device 100E is a foldable electronic device 100E that folds left and right. Of course, those skilled in the art will understand that in other alternative embodiments, the direction of the axis O2 of the pivot 250E may also be parallel to the transverse direction T of the foldable electronic device 100E, that is, the foldable electronic device 100E is a foldable electronic device 100E that folds up and down, which does not limit the scope of protection of this application.

[0361] Antenna system 300E also includes a first antenna 400E and a second antenna 500E. The first antenna 400E includes a strip-shaped first antenna radiator 410E, which has a first end 411E and a second end 412E, and has a first feed point 420E and a first ground point 430E. The first feed point 420E is located between the first end 411E and the second end 412E of the first antenna radiator 410E, and is connected to the first radio frequency source 800E to receive the radio frequency signal output by the first radio frequency source 800E. The first ground point 430E is located between the first feed point 420E and the second end 412E of the first antenna radiator 410E, and is electrically connected to the ground of the first device body 210E, specifically, to the floor 211E of the first device body 210E.

[0362] The second antenna 500E includes a strip-shaped second antenna radiator 510E. The second antenna radiator 510E includes a first end 511E and a second end 512E, and has a second feed point 520E and a second ground point 530E. The second feed point 520E is located between the first end 511E and the second end 512E of the second antenna radiator 510E, and is connected to the second radio frequency source 810E to receive the radio frequency signal output by the second radio frequency source 810E. The second ground point 530E is located between the second feed point 520E and the first end 511E of the second antenna radiator 510E, and is connected to the floor 211E of the first device body 210E.

[0363] The first antenna radiator 410E is located on one side of a virtual line O1, and the second antenna radiator 510E is located on the opposite side of the virtual line O1. The virtual line O1 is perpendicular to the axis O2 of the rotating shaft 250E. The virtual line O1 is the centerline of the main body 200E or parallel to the centerline of the main body 200E, and the centerline of the main body 200E is perpendicular to the axis O2 of the rotating shaft 250E.

[0364] In this embodiment, the structure of the first antenna 400E can adopt the structure of the first antenna provided in any embodiment of Example 1, and the structure of the second antenna 500E can also adopt the structure of the second antenna provided in any embodiment of Example 1.

[0365] The antenna system 300E also includes a strip-shaped second parasitic radiator 700E, positioned corresponding to the second antenna radiator 510E. The second parasitic radiator 700E and the second antenna radiator 510E are located in different equipment bodies within the first equipment body 210E and the second equipment body 220E, respectively, and the second parasitic radiator 700E is connected to the floor of its respective equipment body. In other words, in this embodiment, the antenna system 300E does not include the first parasitic radiator provided in Embodiment 1, but it does include a second parasitic radiator 700E positioned corresponding to the second antenna radiator 510E.

[0366] In this embodiment, the first antenna radiator 410E and the second antenna radiator 510E are disposed on the first device body 210E, and the second parasitic radiator 700E is disposed on the second device body 220E. The second parasitic radiator 700E is connected to the floor 221E of the second device body 220E. Of course, those skilled in the art will understand that in alternative embodiments, the first antenna radiator 410E and the second antenna radiator 510E may also be disposed on different device bodies. For example, the second antenna radiator 510E may be disposed on the first device body 210E, and the first antenna radiator 410E and the second parasitic radiator 700E may be disposed on the second device body 220E; or, the second antenna radiator 510E may be disposed on the second device body 220E, and the first antenna radiator 410E and the second parasitic radiator 700E may be disposed on the first device body 210E. This does not limit the scope of protection of this application.

[0367] Furthermore, such as Figure 16As shown, at least a portion of the first antenna radiator 410E and at least a portion of the second antenna radiator 510E are respectively located outside the side edge of the floor of the device body 211E away from the pivot 250E, and are respectively disposed opposite to that side edge of the floor of the device body 210E. In this embodiment, at least a portion of the first antenna radiator 410E is located outside the side edge of the floor 211E of the first device body 210E away from the pivot 250E, and is disposed opposite to that side edge of the floor 211E of the first device body 210E. That is, at least a portion of the first antenna radiator 410E is located outside the left side edge 212E of the floor 211E of the first device body 210E, and is disposed opposite to that left side edge 212E of the floor 211E of the first device body 210E. At least a portion of the second antenna radiator 510E is located outside the side edge of the floor 211E of the first device body 210E away from the pivot 250E, and is disposed opposite to that side edge of the floor 211E of the first device body 210E. At least a portion of the second antenna radiator 510E is located outside the left edge 212E of the floor 211E of the first device body 210E, and is disposed opposite to the left edge 212E of the floor 211E of the first device body 210E. The left edge 212E of the floor 211E of the first device body 210E extends along the longitudinal direction L of the foldable electronic device 100E. The first antenna radiator 410E is located below the virtual line O1, and the second antenna radiator 510E is located above the virtual line O1.

[0368] When the foldable electronic device 100E is in a folded state, viewed from the thickness direction of the foldable electronic device 100E, the second antenna radiator 510E is spaced apart from the corresponding second parasitic radiator 700E, and at least a portion of the second antenna radiator 510E overlaps with at least a portion of the second parasitic radiator 700E, such that the second antenna radiator 510E is coupled to the corresponding second parasitic radiator 700E respectively.

[0369] By setting a second parasitic radiator 700E that corresponds to and at least partially overlaps with the second antenna radiator 510E in the folded state, the pair of antennas, the first antenna 400E and the second antenna 500E, can still work independently and normally when the foldable electronic device 100E is in the folded state, even when the two antennas of the pair are close to each other and have a low envelope correlation coefficient (i.e., ECC). Furthermore, the second antenna 500E of the pair of antennas has high antenna efficiency, thus improving the antenna performance of the foldable electronic device 100E in the folded state.

[0370] like Figure 16As shown, the first antenna radiator 410E is L-shaped and located at the first corner of the first conductive frame of the first device body 210E. The first corner corresponds to the first diagonal 215E of the floor 211E of the first device body 210E, that is, it is located near the first diagonal 215E of the floor 211E. The first antenna radiator 410E includes a first straight segment 413E extending along the left edge 212E of the floor 211E of the first device body 210E and a second straight segment 414E perpendicularly connected to the end of the first straight segment 413E away from the virtual line O1. The free ends of the first straight segment 413E and the second straight segment 414E are the second end 412E and the first end 411E of the first antenna radiator 410E, respectively. The first feed point 420E and the first ground point 430E are both located on the first straight segment 413E. The first ground point 430E is located in the middle of the first straight segment 413E of the first antenna radiator 410E.

[0371] Furthermore, the length of the first antenna radiator 410E located between the first grounding point 430E and the second end 412E is 29.4 mm; the length of the first antenna radiator 410E located between the first grounding point 430E and the first end 411E is 61.6 mm; and the length of the first antenna radiator 410E located between the first grounding point 430E and the first feed point 420E is 14 mm. The length of the first straight segment 413E is greater than the length of the second straight segment 414E; the length of the first straight segment 413E is 64 mm, and the length of the second straight segment 414E is 27 mm. In this embodiment, the length of the first antenna radiator 410E located between the first grounding point 430E and the first end 411E is 1 / 4 of the operating wavelength of the first antenna.

[0372] like Figure 16As shown, the second antenna radiator 510E is L-shaped and located at the second corner of the first conductive frame of the first device body 210E. The second corner corresponds to the second diagonal 216E of the floor 211E of the first device body 210E, that is, it is located near the second diagonal 216E of the floor 211E. The second antenna radiator 510E includes a first straight segment 513E extending along the left edge 212E of the floor 211E of the first device body 210E and a second straight segment 514E perpendicularly connected to the end of the first straight segment 513E away from the virtual line O1. The free ends of the first straight segment 513E and the second straight segment 514E are respectively the second end 512E of the second antenna radiator 510E and the first end 511E of the second antenna radiator 510E. The second grounding point 530E of the second antenna radiator 510E is located near the first end 511E of the second antenna radiator 510E, and the second feed point 520E is located near the second end 512E of the second antenna radiator 510E. The length of the second antenna radiator 510E located between the second grounding point 530E and the second end 512E is 37.5 mm; the length of the second antenna radiator 510E located between the second grounding point 530E and the second feed point 520E is 27.8 mm.

[0373] Furthermore, the second feed point 520E is located on the first straight segment 513E, and the second grounding point 530E is located on the second straight segment 514E. The length of the first straight segment 513E is 29 mm, and the length of the second straight segment 514E is 14 mm. The length of the second antenna radiator 510E, located between the second grounding point 530E and the first end 511E, is 5.0 mm.

[0374] In this embodiment, the second antenna is a left-handed antenna, and the length of the second antenna radiator 510E located between the second grounding point 530E and the second end 512E is 1 / 8 to 1 / 4 times the operating wavelength of the second antenna.

[0375] Of course, those skilled in the art will understand that in alternative embodiments, the second grounding point 530E may also be located at a suitable position on the first straight segment 513E, and the second power supply point 520E may also be located at other suitable positions, which does not limit the scope of protection of this application.

[0376] like Figure 16As shown, the second parasitic radiator 700E includes a first end 740E and a second end 750E. The first end 740E of the second parasitic radiator 700E is closer to the rotating shaft 250E than the second end 750E. The second parasitic radiator 700E has a second parasitic grounding point 710E, which is located between the first end 740E and the second end 750E of the second parasitic radiator 700E, and close to the position of the second end 750E. The second parasitic grounding point 710E is connected to the floor of the equipment body on which the second parasitic radiator 700E is located, that is, the second parasitic grounding point 710E of the second parasitic radiator 700E is connected to the floor 221E of the second equipment body 220E. Of course, those skilled in the art will understand that, in alternative embodiments, the second parasitic grounding point 710E may also be located at the second end 750E of the second parasitic radiator 700E.

[0377] Furthermore, the floor of the device body containing the second parasitic radiator 700E has a side edge away from the pivot 250E and another side edge intersecting with that side edge. Specifically, the floor 221E of the second device body 220E has a right side edge 222E away from the pivot 250E and an upper side edge 223E intersecting with that right side edge 222E. At least a portion of the second parasitic radiator 700E is located outside this other side edge of the floor of the device body containing it and is positioned opposite to that other side edge. In other words, at least a portion of the second parasitic radiator 700E is located outside the upper side edge 223E of the floor 221E of the second device body 220E and is positioned opposite to the upper side edge 223E of the floor 221E of the second device body 220E. Furthermore, this at least portion of the second parasitic radiator 700E is perpendicular to this at least portion of the second antenna radiator 510E. In this embodiment, the first straight segment 720E of the second parasitic radiator 700E is perpendicular to the first straight segment 513E of the second radiator 510E. The upper edge 223E of the floor 221E of the second device body 220E extends along the transverse direction T of the foldable electronic device 100E, and the right edge 222E of the floor 221E of the second device body 220E extends along the longitudinal direction L of the foldable electronic device 100E. The second parasitic radiator 700E is located above the virtual line O1.

[0378] Furthermore, in the direction parallel to the virtual line O1, the first end 740E of the second parasitic radiator 700E is closer to the axis of rotation 250E than the second end 750E of the second parasitic radiator 700E.

[0379] Furthermore, the second parasitic radiator 700E is L-shaped and located at the second corner of the second conductive frame of the second device body 220. The second corner of the second conductive frame corresponds to the second diagonal 226E of the floor 221 of the second device body 220, that is, it is located near the second diagonal 226E of the floor 221. When the foldable electronic device is in a folded state, the second corner of the second conductive frame overlaps with the second corner of the first conductive frame in the thickness direction of the foldable electronic device. The second parasitic radiator 700E includes a first straight segment 720E and a second straight segment 730E that is perpendicularly connected to the end of the first straight segment 720E away from the pivot 250E. The free ends of the first straight segment 720E and the second straight segment 730E are the first end 740E and the second end 750E of the second parasitic radiator 700E, respectively. The first straight segment 720E is positioned opposite to one side edge of the floor of the main body of the equipment containing the first parasitic radiator, and the second straight segment 730E is located outside that side edge of the floor of the main body of the equipment containing the first parasitic radiator, and is positioned opposite to that side edge of the floor. In other words, the first straight segment 720E is located outside the upper edge 223E of the floor 221E of the second equipment body 220E, and is positioned opposite to that upper edge 223E of the floor 221E of the second equipment body 220E.

[0380] Furthermore, the second parasitic radiator 700E is also located near a pair of corners of the floor of the device body 220E, away from the pivot 250E, and extends along the corner edge of that corner. That is, the second parasitic radiator 700E is also located near a second corner 226E of the floor 221E of the second device body 220E, and extends along the corner edge of the second corner 226E of the floor 221E of the second device body 220E.

[0381] Furthermore, the first straight segment 720E extends along the axis O2 perpendicular to the pivot 250E, and the second straight segment 730E extends along the axis O2 parallel to the pivot 250E. That is, the first straight segment 720E extends along the transverse T of the foldable electronic device 100E, and the second straight segment 730E extends along the longitudinal L of the foldable electronic device 100E.

[0382] like Figure 16As shown, the second parasitic grounding point 710E is located on the second straight segment 730E, and the length of the first straight segment 720E is greater than the length of the second straight segment 730E. In this embodiment, the length of the second parasitic radiator 700E located between the second parasitic grounding point 710E and the second end 750E is 20 mm, the length of the second parasitic radiator 700E located between the second parasitic grounding point 710E and the first end 740E is 9.4 mm, the length of the first straight segment 720E is 7.19 mm, and the length of the second straight segment 730E is 29.4 mm. Of course, those skilled in the art will understand that in alternative embodiments, the second parasitic grounding point 710E may also be located on the first straight segment 720E, which does not limit the scope of protection of this application. In this embodiment, the length of the second parasitic radiator 700E located between the second parasitic grounding point 710E and the first end 740E is 1 / 4 of the operating wavelength of the second antenna.

[0383] Furthermore, in this embodiment, the extension direction of the first straight segment 513E of the second radiator 510E and the extension direction of the second straight segment 730E of the second parasitic radiator 700E are parallel to each other, and the extension direction of the second straight segment 514E of the second radiator 510E and the extension direction of the first straight segment 720E of the second parasitic radiator 700E are parallel to each other.

[0384] Furthermore, when the foldable electronic device 100E is in a folded state, in the direction parallel to the virtual line O1, the first end 740E of the second parasitic radiator 700E is closer to the pivot 250E than the first end 740E of the second parasitic radiator 510E, and in the direction parallel to the axis O2 of the pivot 250E, the second end 750E of the second parasitic radiator 510E is closer to the virtual line O1 than the second end 750E of the second parasitic radiator 700E.

[0385] Of course, those skilled in the art will understand that in other alternative embodiments, the second parasitic radiator 700E may also take the form of other shapes and is not limited to an L-shape. For example, the second parasitic radiator 700E may be in the shape of a straight strip.

[0386] Specifically, when the two parasitic radiators are straight, the second parasitic radiator 700E extends in a straight line along the edge of the floor of the main body of the equipment where the second parasitic radiator 700E is located, and the second parasitic radiator 700E extends in a direction perpendicular to the axis O2 of the rotation shaft 250E. That is, the second parasitic radiator 700E extends in a straight line along the upper edge 223E of the second main body of the equipment 220E.

[0387] Those skilled in the art will understand that when both the second antenna radiator 510E and the second parasitic radiator 700E are L-shaped, the extension direction of the first straight segment 513E of the second antenna radiator 510E and the extension direction of the second straight segment 730E of the second parasitic radiator 700E are parallel to each other, and the extension direction of the second straight segment 514E of the second antenna radiator 510E and the extension direction of the first straight segment 720E of the second parasitic radiator 700E are parallel to each other. When the second antenna radiator 510E is straight and the second parasitic radiator 700E is L-shaped, the extension direction of the second antenna radiator 510E and the extension direction of the second straight segment 730E of the second parasitic radiator 700E are parallel to each other, and the extension direction of the second antenna radiator 510E and the extension direction of the first straight segment 720E of the second parasitic radiator 700E are perpendicular to each other. When the second antenna radiator 510E is L-shaped and the second parasitic radiator 700E is straight, the extension direction of the first straight segment 513E of the second antenna radiator 510E and the extension direction of the second parasitic radiator 700E are perpendicular to each other, and the extension direction of the second straight segment 514E of the second antenna radiator 510E and the extension direction of the second parasitic radiator 700E are parallel to each other.

[0388] In this embodiment, the first antenna radiator 410E, the second antenna radiator 510E, and the second parasitic radiator 700E are formed by the conductive frame of the foldable electronic device 100E. Specifically, the first antenna radiator 410E and the second antenna radiator 510E are formed by the first conductive frame of the first device body 210E, and the second parasitic radiator 700E is formed by the second conductive frame of the second device body 220E. Of course, those skilled in the art will understand that in alternative embodiments, the first antenna radiator 410E, the second antenna radiator 510E, and the second parasitic radiator 700E may also be a patch structure, which is attached to the surface of the conductive frame of the foldable electronic device 100E and is made of conductive material. The first antenna radiator 410E, the second antenna radiator 510E, and the second parasitic radiator 700E may also be transparent antennas embedded inside the screen of the foldable electronic device 100E. The first antenna radiator 410E, the second antenna radiator 510E, and the second parasitic radiator 700E can also adopt a patch structure. The patch structure is attached to the back cover of the foldable electronic device 100E and is made of conductive material.

[0389] In this embodiment, the operating frequency bands of the first antenna 400E and the second antenna 500E are the same or partially overlap. In this embodiment, the operating frequency range of the first antenna 400E is 0.7–0.96 GHz, and the operating frequency range of the second antenna 500E is also 0.7–0.96 GHz; that is, the operating frequency bands of the first antenna 400E and the second antenna 500E are low-frequency. Those skilled in the art will understand that in alternative embodiments, the operating frequency bands of the first antenna 400E and the second antenna 500E can also be mid-to-high frequency.

[0390] Please see Figure 17 , Figure 17 This is a schematic diagram of the structure of the second embodiment of the foldable electronic device of Embodiment 2 of this application in the unfolded state.

[0391] like Figure 17 As shown, the structure of the foldable electronic device 100F provided in the second embodiment is basically the same as that of the foldable electronic device 100F provided in the first embodiment. That is, the foldable electronic device 100F also includes a device body 200F and an antenna system 300F. The device body 200F also includes a first device body 210F and a second device body 220F rotatably connected by a pivot 250F. The antenna system 300F also includes a first antenna 400F, a second antenna 500F, and a second parasitic radiator 700F. The first antenna 400F includes a first antenna radiator 410F, and the second antenna 500F includes a second antenna radiator 510F. The difference between the structure of the foldable electronic device 100F provided in the second embodiment and the foldable electronic device 100F provided in the first embodiment is that the second antenna radiator 510F of the second antenna 500F is in the shape of a straight strip. The second antenna radiator 510F extends in a straight line along the side edge of the floor of the main body of the equipment where the second antenna radiator 510F is located, that is, the second antenna radiator 510F extends in a straight line along the left edge 212F of the floor 211F of the first main body of the equipment 210F, and the second antenna radiator 510F extends in a direction parallel to the axis O2 of the rotating shaft 250F.

[0392] Please see Figure 18 , Figure 18 A schematic diagram of the unfolded state of the foldable electronic device 100B', which is a second reference design. Figure 18 As shown, combined with Figure 16It is understood that the second reference design of the foldable electronic device 100B' is based on the structure of the foldable electronic device 100E provided in the first embodiment of Embodiment 2 of this application, in which the second parasitic radiator 700B' is suspended relative to the floor 221B' of the second device body 220B' without a grounding point, that is, the second parasitic radiator 700B' is not connected to the floor 221B' of the second device body 220B', and the second parasitic radiator 700B' is not connected to the floor 221B'.

[0393] Please see Figure 19 , Figure 19 A schematic diagram of the unfolded state of the foldable electronic device 100C', which is a third reference design. Figure 19 As shown, combined with Figure 16 It is understood that the foldable electronic device 100C' of this third reference design differs in structure from the foldable electronic device 100E provided in the first embodiment of Embodiment 2 of this application in that the second parasitic radiator 700C' is linear. The second parasitic radiator 700C' extends in a straight line along the side edge of the floor of the device body where the second parasitic radiator 700C' is located, away from the pivot axis 250C', and extends in a direction parallel to the axis O2 of the pivot axis 250C'. That is, the second parasitic radiator 700C' extends in a straight line along the right edge 222C' of the second device body 220C'.

[0394] The foldable electronic devices provided by the first embodiment, the second reference design, and the third reference design in this example were simulated and analyzed using the full-wave electromagnetic simulation software HFSS, and the results were obtained as follows: Figures 20-22 The effect curve shown is shown.

[0395] Get Figures 20-22 The simulation conditions for the curves shown are shown in Table 4 below (please refer to Table 4 for details). Figure 16 as well as Figures 18-19 (Understood)

[0396] Table 4

[0397]

[0398]

[0399] Please see Figures 20-22 , Figure 20 When the foldable electronic device of the first embodiment, second reference design, and third reference design of this application is in the folded state, the second antenna S 11 Comparison chart of simulation results for the parameters. Figure 21The simulation comparison diagram shows the envelope correlation coefficient (ECC) between the second antenna and the first antenna when the foldable electronic device of the first embodiment, the second reference design and the third reference design of this application are in the folded state. Figure 22 The simulation comparison diagram shows the radiation efficiency and system efficiency of the second antenna when the foldable electronic device of the first embodiment, second reference design and third reference design of this application is in the folded state.

[0400] Among them, Figure 20 In the diagram, the horizontal axis represents frequency in GHz, and the vertical axis represents frequency in seconds (S). 11 The amplitude value, in dB. 11 It belongs to one type of S-parameter. 11 The reflection coefficient indicates the transmission efficiency of the second antenna. The smaller the value, the less energy is reflected back by the second antenna itself, and the better the antenna efficiency.

[0401] from Figure 20 As can be seen, in the 0.74–0.78 GHz frequency band, the S of the second antenna in the first embodiment… 11 Less than -6dB, S-band of the second antenna of the second reference design 11 Less than -6dB, S-band of the second antenna of the third reference design 11 Less than -6dB, that is, the operating frequency band of the second antenna in the first embodiment, the second antenna in the second reference design, and the second antenna in the third reference design are all 0.74 to 0.78 GHz, of which the resonant frequency of the second antenna is 0.76 GHz.

[0402] See Figure 21 The horizontal axis represents frequency in GHz, and the vertical axis represents the amplitude of the envelope correlation coefficient (ECC). A smaller envelope correlation coefficient indicates higher antenna diversity gain, and consequently, higher signal-to-noise ratio and communication quality. Figure 21 It can be seen that, within the operating frequency band of 0.74 to 0.78 GHz, the ECC between the first antenna and the second antenna in the first embodiment, the second reference design, and the third reference design is all below 0.5.

[0403] In the second reference design (i.e., the scheme where the second parasitic radiator does not parasitically radiate the second antenna radiator), the ECC between the first and second antennas fully meets the requirements for normal operation of both antennas. In the third reference design (i.e., the scheme where the second parasitic radiator extends longitudinally along the foldable electronic device), the ECC between the first and second antennas also fully meets the requirements for normal operation of both antennas. Furthermore, in the first embodiment, the ECC between the first and second antennas also fully meets the requirements for normal operation of both antennas. However, compared to the second reference design, the third reference design shows a slight deterioration in the ECC between the first and second antennas (i.e., a slight increase in ECC). In the first embodiment, compared to the second reference design, the first embodiment shows a certain degree of optimization in the ECC between the first and second antennas (i.e., a certain degree of decrease in ECC). Therefore, when at least a portion of the second parasitic radiator extends laterally along the foldable electronic device, the ECC between the first and second antennas is more optimized than when the second parasitic radiator extends longitudinally along the foldable electronic device.

[0404] In this embodiment, when the second antenna operates at a frequency of 0.76 GHz, the ECC between the first and second antennas in the second reference design is 0.3997, in the third reference design it is 0.498, and in the first embodiment of Example 2 of this application, the ECC between the first and second antennas is 0.168. Therefore, when the second antenna operates at 0.76 GHz, in the first embodiment of this application, compared to the second reference design, the ECC between the first and second antennas decreases by 0.232 (an improvement of 0.24), while in the third reference design compared to the second reference design, the ECC between the first and second antennas increases by 0.1 (a deterioration of 0.1). In other words, in the first embodiment of this application, the ECC between the first and second antennas is the best, the second reference design is second best, and the third reference design has the worst ECC between the first and second antennas.

[0405] Please see Figure 22 The horizontal axis represents frequency in GHz, and the vertical axis represents the magnitude of radiative efficiency and system efficiency. From... Figure 22It can be seen that, at an operating frequency of 0.76 GHz, the radiation efficiency of the second antenna in the first embodiment is -3.3 dB, and the system efficiency is -3.5255 dB; in the second reference design, the radiation efficiency of the second antenna is -3.8 dB, and the system efficiency is -4.0719 dB; and in the third reference design, the radiation efficiency of the second antenna is -2.7 dB, and the system efficiency is -3.0094 dB. Therefore, compared to the second reference design, the first embodiment improves the radiation efficiency of the second antenna by 0.5 dB and the system efficiency by 0.546 dB at an operating frequency of 0.76 GHz. Furthermore, compared to the second reference design, the third reference design improves the radiation efficiency of the second antenna by 1.1 dB and the system efficiency by 1.063 dB at an operating frequency of 0.76 GHz.

[0406] Therefore, compared to the second reference design, the first embodiment improves the radiation efficiency of the second antenna by 0.5 dB and the system efficiency by 0.546 dB. Compared to the second reference design, the third reference design improves the radiation efficiency of the second antenna by 1.1 dB and the system efficiency by 1.063 dB. Thus, it can be concluded that the second parasitic radiator used in this application further optimizes the radiation efficiency and system efficiency of the second antenna.

[0407] Figure 23 The first embodiment of Example 2 of this application and the second reference design show the radiation pattern of the second antenna when the foldable electronic device is in a folded state; wherein the operating frequency of the second antenna is 0.76 GHz. Figure 23 In the diagram, 0 degrees represents the horizontal direction of the foldable electronic device, and 90 degrees represents the vertical direction.

[0408] like Figure 23 As shown, in the second reference design, the maximum radiation direction in the radiation pattern of the second antenna is at 90 degrees, corresponding to the longitudinal direction of the foldable electronic device. In the first embodiment of Embodiment 2 of this application, the maximum radiation direction in the radiation pattern of the second antenna is at approximately 70 degrees, corresponding to the longitudinal direction of the foldable electronic device, which is slightly laterally oriented. Therefore, it can be seen that in this embodiment, the introduction of the second parasitic radiator alters the radiation pattern of the second antenna, making the maximum radiation direction in the radiation pattern of the second antenna slightly laterally oriented.

[0409] Please see Figure 24a and Figure 24b , Figure 24a and Figure 24b This is a schematic diagram of the current distribution structure near the second antenna position of the foldable electronic device in the first embodiment of this application when it is in a folded state. Figure 24a The view shown is from one side of the main screen. Figure 24b The view shown is from one side of the secondary screen. Figure 24a In the diagram, solid arrows indicate the direction of current on the second antenna radiator, while dashed arrows indicate the direction of current on the floor of the first equipment body where the second antenna radiator is located. Figure 24b In the diagram, the solid arrow indicates the direction of the current on the second parasitic radiator, and the dashed arrow indicates the direction of the current on the floor of the second device body where the second parasitic radiator is located.

[0410] from Figure 24a As can be seen from this, the current on the floor of the main body of the first device, where the second antenna radiator is located, is mainly a longitudinal current. From Figure 24b As can be seen from the data, the current on the floor of the second device, where the second parasitic radiator is located, is primarily transverse. In other words, the introduction of the second parasitic radiator causes the direction of the current on the floor corresponding to the second antenna to be biased towards the transverse direction, while still vertical. This also demonstrates that introducing the second parasitic radiator can alter the maximum radiation direction of the second antenna.

[0411] As can be seen from the above comparison and analysis, the key to changing the radiation direction of the second antenna in Embodiment 2 of this application lies in the introduction of the second parasitic radiator and the extension direction of the second parasitic radiator, as well as the distribution ratio of transverse current and longitudinal current in the current distribution on the floor, thereby obtaining different radiation pattern representations. Specifically, when the second parasitic radiator extends in a straight line at least partially along the other edge (i.e., the upper edge) of the floor of the device body where the second parasitic radiator is located, and the second parasitic grounding point is close to the second end of the second parasitic radiator, the direction of the current on the floor of the second device body where the second antenna radiator is located is longitudinally biased towards transverse, thereby making the envelope correlation coefficient between the first antenna and the second antenna low, thus avoiding mutual interference between the first antenna and the second antenna, and ensuring that the first antenna and the second antenna can work normally.

[0412] Example 3

[0413] Please see Figure 25 , Figure 25 This is a schematic diagram of the first embodiment of the foldable electronic device of Embodiment 3 of this application in its unfolded state. Figure 25As shown, the foldable electronic device 100G provided in the first embodiment of this invention also includes a device body 200G and an antenna system 300G. The device body 200G includes a first device body 210G and a second device body 220G, which are rotatably connected by a pivot 250G to allow the foldable electronic device 100G to switch between an unfolded state and a folded state. Both the first device body 210G and the second device body 220G have a floor. The antenna system 300G includes a first antenna 400G, a second antenna 500G, a first parasitic radiator 600G, and a second parasitic radiator 700G. In this embodiment, the first antenna 400G can be any one of the first antennas provided in either Embodiment 1 or Embodiment 2 of this application; the second antenna 500G can also be any one of the second antennas provided in either Embodiment 1 or Embodiment 2 of this application; the first parasitic radiator 600G can be any one of the first parasitic radiators provided in either Embodiment 1 of this application; and the second parasitic radiator 700G can be any one of the second parasitic radiators provided in either Embodiment 2 of this application. That is, in this embodiment, a first parasitic radiator 600G corresponding to the first antenna radiator 410G and a second parasitic radiator 700G corresponding to the second antenna radiator 510G are simultaneously provided.

[0414] like Figure 25 As shown, in this embodiment, the axis O2 of the pivot 250G is parallel to the longitudinal direction of the foldable electronic device 100G, meaning the foldable electronic device 100G can fold left and right. The first antenna radiator 410G and the second antenna radiator 510G are located on the first device body 210G, and the first parasitic radiator 600G and the second parasitic radiator 700G are located on the second device body 220G. The first parasitic radiator 600G and the second parasitic radiator 700G are connected to the floor 221G of the second device body 220G. That is, the first antenna radiator 410G and the second antenna radiator 510G are located on the same device body, and the first parasitic radiator 600G and the second parasitic radiator 700G are also located on the same device body. However, the first antenna radiator 410G and the first parasitic radiator 600G are located on different device bodies, and the second antenna radiator 510G and the second parasitic radiator 700G are located on different device bodies.

[0415] In this embodiment, the first antenna radiator 410G and the first parasitic radiator 600G are located below the virtual line O1, and the second antenna radiator 510G and the second parasitic radiator 700G are located above the virtual line O1. The virtual line O1 is perpendicular to the axis O2 of the rotation shaft.

[0416] Please see Figure 26 , Figure 26 This is a schematic diagram of the structure of the second embodiment of the foldable electronic device of Embodiment 3 of this application in the unfolded state.

[0417] like Figure 26 As shown, the structure of the foldable electronic device 100H provided in the second embodiment is basically the same as that of the foldable electronic device 100E provided in the first embodiment. The difference is that the first antenna radiator 410H and the second parasitic radiator 700H are located in the first device body 210H, and the second antenna radiator 510H and the first parasitic radiator 600H are located in the second device body 220H. That is, the first antenna radiator 410H and the second antenna radiator 510H are located in different device bodies, and the first parasitic radiator 600H and the second parasitic radiator 700H are located in different device bodies.

[0418] Please see Figure 27 , Figure 27 This is a schematic diagram of the structure of the third embodiment of the foldable electronic device of this application in the unfolded state.

[0419] like Figure 27 As shown, the structure of the foldable electronic device 100I provided in this third embodiment is basically the same as that of the foldable electronic device 100E provided in the first embodiment. The difference is that, in this embodiment, the direction of the axis O2 of the rotating shaft 250I is parallel to the horizontal direction T of the foldable electronic device, that is, the foldable electronic device 100I is a foldable electronic device that folds up and down. The device body 200I includes a first device body 210I and a second device body 220I rotatably connected around the rotating shaft 250I. The first antenna radiator 410I and the second antenna radiator 510I are located in the same device body, namely the first device body 210I. The first parasitic radiator 600I and the second parasitic radiator 700I are located in the same device body, namely the second device body 220I.

[0420] In this embodiment, the first antenna radiator 410I and the first parasitic radiator 600I are located to the left of the virtual line O1O1, and the second antenna radiator 510I and the second parasitic radiator 700I are located to the right of the virtual line O1O1. The virtual line O1 is perpendicular to the axis O2 of the rotation shaft 250I.

[0421] Please see Figure 28 , Figure 28 This is a structural schematic diagram of the fourth embodiment of the foldable electronic device of Embodiment 3 of this application in the unfolded state.

[0422] like Figure 28As shown, the structure of the foldable electronic device 100J provided in this fourth embodiment is basically the same as that of the foldable electronic device 100I provided in the third embodiment. The difference is that, in this embodiment, the first antenna radiator 410J and the second parasitic radiator 700J are located in the same device body, namely the first device body 210J, and the second antenna radiator 510J and the first parasitic radiator 700J are also located in the same device body, namely the second device body 20J. That is to say, the first antenna radiator 410J and the second antenna radiator 510J are located in different device bodies, and the first parasitic radiator 600J and the second parasitic radiator 700J are located in different device bodies.

[0423] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A foldable electronic device, comprising a first device body and a second device body, wherein the first device body and the second device body are connected by a hinge, the first device body having a first conductive frame, and the second device body having a second conductive frame, characterized in that... The foldable electronic device also includes: A first antenna and a second antenna, wherein the first antenna includes a first antenna radiator having a first feed point, and the second antenna includes a second antenna radiator having a second feed point, and the first antenna radiator and the second antenna radiator are spaced apart on the main body of the first device, wherein the operating frequency band of the first antenna and the operating frequency band of the second antenna are the same or partially overlap. A first parasitic radiator, located on the second device body, includes a first end and a second end, and has a first parasitic grounding point located between the first end and the second end of the first parasitic radiator. The first parasitic grounding point is grounded through the second device body. When the foldable electronic device is in a folded state, the second end of the first parasitic radiator is closer to the second antenna radiator than the first end of the first parasitic radiator, and the first parasitic grounding point is located near the second end of the first parasitic radiator. The first antenna radiator and the second antenna radiator are formed by the first conductive frame of the first device body, and the first parasitic radiator is formed by the second conductive frame of the second device body; at least a portion of the first antenna radiator and at least a portion of the second antenna radiator extend in a direction parallel to the axis of rotation, at least a portion of the first parasitic radiator extends in a direction perpendicular to the axis of rotation, and the length of the portion extending in the direction parallel to the axis of rotation is greater than the length of the portion extending in the direction perpendicular to the axis of rotation, and the second end of the first parasitic radiator is located in the portion extending in the direction parallel to the axis of rotation; When the foldable electronic device is in a folded state, in the thickness direction of the foldable electronic device, the second antenna radiator and the first parasitic radiator do not overlap, and the first antenna radiator and the first parasitic radiator overlap at least partially, so that the first antenna radiator and the first parasitic radiator are coupled. The first antenna radiator includes a first end and a second end, and has a first grounding point located between the first feed point and the second end of the first antenna radiator. The first feed point is located between the first end and the second end of the first antenna radiator, and the second end of the first antenna radiator is closer to the second antenna radiator than the first end. The first grounding point is located near the second end of the first antenna radiator, and the first feed point is located on a portion of the first antenna radiator extending in a direction parallel to the rotation axis. The first grounding point of the first antenna radiator is grounded through the first device body. The second antenna radiator includes a first end and a second end, and has a second grounding point located between the second feed point and the first end of the second antenna radiator. The second feed point is located between the first end and the second end of the second antenna radiator. The second end of the second antenna radiator is closer to the first antenna radiator than the first end of the second antenna radiator. The second grounding point is located near the first end of the second antenna radiator. The second feed point is located on a portion of the second antenna radiator extending in a direction parallel to the axis of rotation. The second grounding point of the second antenna radiator is grounded through the first device body.

2. The foldable electronic device as claimed in claim 1, characterized in that, The first antenna radiator is L-shaped and located at the first corner of the first conductive frame of the first device body, and includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the first antenna radiator extends in a direction parallel to the axis of rotation. The second antenna radiator is L-shaped and located at the second corner of the first conductive frame of the first device body, and includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the second antenna radiator extends in a direction parallel to the axis of rotation.

3. The foldable electronic device as described in claim 2, characterized in that, A portion of the first parasitic radiator extends in a direction perpendicular to the axis of rotation, and another portion extends in a direction parallel to the axis of rotation.

4. The foldable electronic device as claimed in claim 3, characterized in that, The first parasitic radiator is L-shaped and located at the first corner of the second conductive frame of the second device body. When the foldable electronic device is in a folded state, the first corner of the second conductive frame overlaps with the first corner of the first conductive frame in the thickness direction of the foldable electronic device. The first parasitic radiator includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the first parasitic radiator extends in a direction parallel to the axis of rotation.

5. The foldable electronic device as claimed in claim 4, characterized in that, When the foldable electronic device is in the folded state, the first end of the first parasitic radiator is close to the first end of the first antenna radiator, and the second end of the first parasitic radiator is close to the second end of the first antenna radiator.

6. The foldable electronic device as claimed in claim 5, characterized in that, The first parasitic grounding point is located on the first straight line segment of the first parasitic radiator.

7. The foldable electronic device as claimed in any one of claims 2 to 6, characterized in that, Both the first feed point and the first ground point are located on the first straight line segment of the first antenna radiator.

8. The foldable electronic device as claimed in any one of claims 2 to 6, characterized in that, The second grounding point of the second antenna radiator is located on the second straight segment of the second antenna radiator, and the second feed point is located on the first straight segment of the second antenna radiator, and is close to the second end of the second antenna radiator.

9. The foldable electronic device as claimed in any one of claims 2 to 6, characterized in that, The foldable electronic device further includes a second parasitic radiator, which is located in the second device body and formed by the second conductive frame of the second device body; when the foldable electronic device is in the folded state, in the thickness direction of the foldable electronic device, the second antenna radiator and the second parasitic radiator overlap at least partially, such that the second antenna radiator and the second parasitic radiator are coupled; wherein, The second parasitic radiator includes a first end and a second end, and has a second parasitic grounding point located between the first end and the second end of the second parasitic radiator and close to the second end of the second parasitic radiator. The second parasitic grounding point is grounded through the second device body. The first end of the second parasitic radiator is closer to the pivot axis than the second end of the second parasitic radiator. At least a portion of the second parasitic radiator extends in a direction perpendicular to the pivot axis, and the at least portion of the second parasitic radiator is perpendicular to the at least portion of the second antenna radiator.

10. A foldable electronic device, comprising a first device body and a second device body, the first device body and the second device body being connected by a hinge, the first device body having a first conductive frame, and the second device body having a second conductive frame, characterized in that... The foldable electronic device also includes: A first antenna and a second antenna, wherein the first antenna includes a first antenna radiator having a first feed point, and the second antenna includes a second antenna radiator having a second feed point, and the first antenna radiator and the second antenna radiator are spaced apart on the main body of the first device, wherein the operating frequency band of the first antenna and the operating frequency band of the second antenna are the same or partially overlap. A second parasitic radiator, located on the body of the second device, includes a first end and a second end, and has a second parasitic grounding point located between the first end and the second end of the second parasitic radiator and close to the second end of the second parasitic radiator. The second parasitic grounding point is grounded through the body of the second device. The first end of the second parasitic radiator is closer to the rotating shaft than the second end of the second parasitic radiator, and the second parasitic grounding point is located close to the second end of the second parasitic radiator. The first antenna radiator and the second antenna radiator are formed by the first conductive frame of the first device body, and the second parasitic radiator is formed by the second conductive frame of the second device body; at least a portion of the first antenna radiator and at least a portion of the second antenna radiator extend in a direction parallel to the axis of rotation, and at least a portion of the second parasitic radiator extends in a direction perpendicular to the axis of rotation. When the foldable electronic device is in a folded state, in the thickness direction of the foldable electronic device, the first antenna radiator and the second parasitic radiator do not overlap, and the second antenna radiator and the second parasitic radiator overlap at least partially, so that the second antenna radiator and the second parasitic radiator are coupled. The first antenna radiator includes a first end and a second end, and has a first grounding point located between the first feed point and the second end of the first antenna radiator. The first feed point is located between the first end and the second end of the first antenna radiator, and the second end of the first antenna radiator is closer to the second antenna radiator than the first end. The first grounding point is located near the second end of the first antenna radiator, and the first feed point is located on a portion of the first antenna radiator extending in a direction parallel to the rotation axis. The first grounding point of the first antenna radiator is grounded through the first device body. The second antenna radiator includes a first end and a second end, and has a second grounding point located between the second feed point and the first end of the second antenna radiator. The second feed point is located between the first end and the second end of the second antenna radiator. The second end of the second antenna radiator is closer to the first antenna radiator than the first end of the second antenna radiator. The second grounding point is located near the first end of the second antenna radiator. The second feed point is located on a portion of the second antenna radiator extending in a direction parallel to the axis of rotation. The second grounding point of the second antenna radiator is grounded through the first device body.

11. The foldable electronic device as claimed in claim 10, characterized in that, The first antenna radiator is L-shaped and located at the first corner of the first conductive frame of the first device body, and includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the first antenna radiator extends in a direction parallel to the axis of rotation. The second antenna radiator is L-shaped and located at the second corner of the first conductive frame of the first device body, and includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the second antenna radiator extends in a direction parallel to the axis of rotation.

12. The foldable electronic device as claimed in claim 11, characterized in that, The second parasitic radiator is L-shaped and located at the second corner of the second conductive frame of the second device body. When the foldable electronic device is in a folded state, the second corner of the second conductive frame overlaps with the second corner of the first conductive frame in the thickness direction of the foldable electronic device. The second parasitic radiator includes an intersecting first straight line segment and a second straight line segment, wherein the first straight line segment of the second parasitic radiator extends in a direction perpendicular to the axis of rotation; the second parasitic grounding point is located on the second straight line segment.

13. The foldable electronic device as claimed in any one of claims 10 to 12, characterized in that, When the foldable electronic device is in the folded state, in the direction perpendicular to the axis of rotation, the first end of the second parasitic radiator is closer to the axis of rotation than the first end of the second antenna radiator, and in the direction parallel to the axis of rotation, the second end of the second antenna radiator is closer to the first antenna radiator than the second end of the second parasitic radiator.

14. The foldable electronic device as claimed in any one of claims 11 to 12, characterized in that, Both the first feed point and the first ground point are located on the first straight line segment of the first antenna radiator.

15. The foldable electronic device as claimed in any one of claims 11 to 12, characterized in that, The second grounding point of the second antenna radiator is located on the second straight segment of the second antenna radiator, and the second feed point is located on the first straight segment of the second antenna radiator, and is close to the second end of the second antenna radiator.

16. A foldable electronic device, comprising a first device body and a second device body, the first device body and the second device body being connected by a hinge, the first device body having a first conductive frame, and the second device body having a second conductive frame, characterized in that... The foldable electronic device also includes: A first antenna and a second antenna, wherein the first antenna includes a first antenna radiator having a first feed point, and the second antenna includes a second antenna radiator having a second feed point, the first antenna radiator being located in the first device body, and the second antenna radiator being located in the second device body, wherein the operating frequency bands of the first antenna and the second antenna are the same or partially overlap; A first parasitic radiator, located on the second device body, includes a first end and a second end, and has a first parasitic grounding point located between the first end and the second end of the first parasitic radiator. The first parasitic grounding point is grounded through the second device body. When the foldable electronic device is in a folded state, the second end of the first parasitic radiator is closer to the second antenna radiator than the first end of the first parasitic radiator, and the first parasitic grounding point is located near the second end of the first parasitic radiator. The first antenna radiator is formed by the first conductive frame of the first device body, and the second antenna radiator and the first parasitic radiator are formed by the second conductive frame of the second device body; at least a portion of the first antenna radiator extends in a direction parallel to the axis of rotation, at least a portion of the second antenna radiator extends in a direction parallel to the axis of rotation, at least a portion of the first parasitic radiator extends in a direction perpendicular to the axis of rotation, and the length of the portion extending in the direction parallel to the axis of rotation is greater than the length of the portion extending in the direction perpendicular to the axis of rotation, and the second end of the first parasitic radiator is located in the portion extending in the direction parallel to the axis of rotation; When the foldable electronic device is in a folded state, in the thickness direction of the foldable electronic device, the first antenna radiator and the first parasitic radiator overlap at least partially, such that the first antenna radiator and the first parasitic radiator are coupled, and the first antenna radiator and the second antenna radiator do not overlap. The first antenna radiator includes a first end and a second end, and has a first grounding point located between the first feed point and the second end of the first antenna radiator. The first feed point is located between the first end and the second end of the first antenna radiator, and the second end of the first antenna radiator is closer to the second antenna radiator than the first end. The first grounding point is located near the second end of the first antenna radiator, and the first feed point is located on a portion of the first antenna radiator extending in a direction parallel to the rotation axis. The first grounding point of the first antenna radiator is grounded through the first device body. The second antenna radiator includes a first end and a second end, and has a second grounding point located between the second feed point and the first end of the second antenna radiator. The second feed point is located between the first end and the second end of the second antenna radiator. When the foldable electronic device is in a folded state, the second end of the second antenna radiator is closer to the first antenna radiator than the first end of the second antenna radiator. The second grounding point is located near the first end of the second antenna radiator. The second feed point is located on the portion of the second antenna radiator extending in a direction parallel to the axis of rotation. The second grounding point of the second antenna radiator is grounded through the second device body.

17. The foldable electronic device as claimed in claim 16, characterized in that, The foldable electronic device further includes a second parasitic radiator, which is located on the first device body and formed by the first conductive frame of the first device body; when the foldable electronic device is in the folded state, in the thickness direction of the foldable electronic device, at least a portion of the second antenna radiator and the second parasitic radiator overlap, such that the second antenna radiator and the second parasitic radiator are coupled; wherein, The second parasitic radiator includes a first end and a second end, and has a second parasitic grounding point located between the first end and the second end of the second parasitic radiator and close to the second end of the second parasitic radiator. The second parasitic grounding point is grounded through the first device body. The first end of the second parasitic radiator is closer to the pivot axis than the second end of the second parasitic radiator. At least a portion of the second parasitic radiator extends in a direction perpendicular to the pivot axis, and the at least portion of the second parasitic radiator is perpendicular to the at least portion of the second antenna radiator.

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