Antenna Structure and Electronic Device

Abstract

An antenna structure, comprising: a first substrate and a second substrate, with a dielectric layer between the first substrate and the second substrate. The first substrate includes: a first dielectric substrate, a radiation patch, and a microstrip line disposed on the first dielectric substrate. The radiation patch and the microstrip line are located on a side of the first dielectric substrate away from the second substrate, and the orthographic projection of the microstrip line on the first dielectric substrate does not overlap with the radiation patch. The radiation patch has at least one first slot away from the microstrip line. The second substrate includes: a second dielectric substrate, a feeding structure disposed on a side of the second dielectric substrate close to the first substrate, and a grounding layer disposed on a side of the second dielectric substrate away from the first substrate. The feeding structure is electrically connected to the microstrip line.

Description

Technical Field

[0001] This document relates to, but is not limited to, the field of communication technologies, and particularly to an antenna structure and an electronic device. Background Art

[0002] As an important part of mobile communication, the research and design of antennas play a crucial role in mobile communication. The biggest change brought by the fifth-generation mobile communication technology (5G) is the innovation of the user experience. The quality of the signal in the terminal device directly affects the user experience. Therefore, the design of 5G terminal antennas will surely become one of the important links in 5G deployment. Summary of the Invention

[0003] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of the claims.

[0004] Embodiments of the present disclosure provide an antenna structure and an electronic device.

[0005] On the one hand, embodiments of the present disclosure provide an antenna structure, including: a first substrate and a second substrate, with a dielectric layer between the first substrate and the second substrate. The first substrate includes: a first dielectric substrate, a radiation patch, and a microstrip line disposed on the first dielectric substrate; the radiation patch and the microstrip line are located on a side of the first dielectric substrate away from the second substrate; the microstrip line and the radiation patch do not overlap in the orthographic projection on the first dielectric substrate, and the radiation patch has at least one first slot away from the microstrip line. The second substrate includes: a second dielectric substrate, a feeding structure disposed on a side of the second dielectric substrate close to the first substrate, and a grounding layer disposed on a side of the second dielectric substrate away from the first substrate; the feeding structure is electrically connected to the microstrip line.

[0006] In some exemplary embodiments, the radiation patch is configured to introduce two resonance frequencies and a radiation null between the two resonance frequencies, and the feeding structure is configured to introduce two radiation nulls.

[0007] In some exemplary embodiments, the radiation patch has a first edge and a second edge in a first direction; the second edge is adjacent to the microstrip line, and the first edge is away from the microstrip line; the distance between the first slot and the first edge is less than the distance between the first slot and the second edge. The first slot extends in a second direction, and the first direction intersects the second direction.

[0008] In some exemplary embodiments, in a plane parallel to the first substrate, the radiation patch has a notch at the second edge, and at least a part of the microstrip line is located in the notch of the radiation patch.

[0009] In some exemplary embodiments, the microstrip line is electrically connected to the feeding structure through a conductive post.

[0010] In some exemplary embodiments, the conductive post is in direct contact with the microstrip line and in direct contact with the feeding structure.

[0011] In some exemplary embodiments, the feeding structure includes: a feeding main body, a first branch and a second branch; the antenna structure has a central axis in the first direction, the feeding main body is located on the central axis, and the first branch and the second branch are symmetrically connected to both sides of the feeding main body with respect to the central axis.

[0012] In some exemplary embodiments, the first branch includes: a first feeding branch and a first open-circuit branch; the first open-circuit branch is electrically connected to the first feeding branch, and the first open-circuit branch is located on a side of the first feeding branch away from the feeding main body. The second branch includes: a second feeding branch and a second open-circuit branch; the second open-circuit branch is electrically connected to the second feeding branch, and the second open-circuit branch is located on a side of the second feeding branch away from the feeding main body.

[0013] In some exemplary embodiments, the first open-circuit branch and the second open-circuit branch are straight line segments parallel to the central axis.

[0014] In some exemplary embodiments, the first open-circuit branch and the second open-circuit branch are L-shaped.

[0015] In some exemplary embodiments, the first branch further includes: a first short-circuit branch, and the first short-circuit branch is located on a side of the first feeding branch away from the first open-circuit branch; the second branch further includes: a second short-circuit branch, and the second short-circuit branch is located on a side of the second feeding branch away from the second open-circuit branch. The first short-circuit branch and the second short-circuit branch are symmetric with respect to the central axis, the first short-circuit branch is electrically connected to the feeding main body and the first feeding branch, and the second short-circuit branch is electrically connected to the feeding main body and the second feeding branch.

[0016] In some exemplary embodiments, the feeding body includes a first feeding body and a second feeding body that are electrically connected in sequence; the first feeding branch and the second feeding branch are symmetrically connected to both sides of the first feeding body with respect to the central axis. The first branch further includes a third shorting branch, and the third shorting branch is located on a side of the first feeding branch close to the second feeding body. The second branch further includes a fourth shorting branch, and the fourth shorting branch is located on a side of the second feeding branch close to the second feeding body. The third shorting branch and the fourth shorting branch are symmetric with respect to the central axis, the third shorting branch is connected to the second feeding body and the first feeding branch, and the fourth shorting branch is connected to the second feeding body and the second feeding branch.

[0017] In some exemplary embodiments, the second feeding body is electrically connected to the microstrip line, and the width of the first feeding body is greater than the width of the second feeding body.

[0018] In some exemplary embodiments, the extension length of the first shorting branch is greater than the extension length of the third shorting branch.

[0019] In some exemplary embodiments, the third shorting branch and the fourth shorting branch are L-shaped.

[0020] In some exemplary embodiments, the first shorting branch and the second shorting branch are L-shaped.

[0021] In some exemplary embodiments, the radiation patch further has a second slot, and the second slot is located on a side of the first slot close to the microstrip line.

[0022] In some exemplary embodiments, the extending direction of the second slot is parallel to the extending direction of the first slot, and the length of the second slot in the extending direction is less than the length of the first slot in the extending direction.

[0023] In some exemplary embodiments, the radiation patch is connected to the ground layer by a shorting pin, and the shorting pin is close to the microstrip line.

[0024] In some exemplary embodiments, the orthographic projections of the radiation patch and the feeding structure on the first dielectric substrate do not overlap.

[0025] On the other hand, embodiments of the present disclosure provide an electronic device including the antenna structure as described above.

[0026] Other aspects can be understood after reading and understanding the drawings and the detailed description. Description of the Drawings

[0027] The accompanying drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure. The shapes and sizes of one or more components in the accompanying drawings do not reflect the true scale, and the purpose is only to schematically illustrate the content of the present disclosure.

[0028] Figure 1A It is a schematic plan view of the antenna structure of at least one embodiment of the present disclosure;

[0029] Figure 1B It is Figure 1A A partial cross-sectional schematic view of the antenna structure shown along the central axis OO';

[0030] Figure 1C It is Figure 1A A simulation result diagram of the S11 curve of the antenna structure shown;

[0031] Figure 1D It is Figure 1A A simulation result diagram of the gain curve of the antenna structure shown;

[0032] Figure 2A It is another schematic plan view of the antenna structure of at least one embodiment of the present disclosure;

[0033] Figure 2B It is Figure 2A A simulation result diagram of the S11 curve of the antenna structure shown;

[0034] Figure 2C It is Figure 2A A simulation result diagram of the gain curve of the antenna structure shown;

[0035] Figure 3A It is another schematic plan view of the antenna structure of at least one embodiment of the present disclosure;

[0036] Figure 3B It is Figure 3A A simulation result diagram of the S11 curve of the antenna structure shown;

[0037] Figure 3C It is Figure 3A A simulation result diagram of the gain curve of the antenna structure shown;

[0038] Figure 4A It is another schematic plan view of the antenna structure of at least one embodiment of the present disclosure;

[0039] Figure 4B It is Figure 4A A simulation result diagram of the S11 curve of the antenna structure shown;

[0040] Figure 4C It is Figure 4ASimulation result diagram of the gain curve of the antenna structure shown;

[0041] Figure 5A Another planar schematic diagram of the antenna structure according to at least one embodiment of the present disclosure;

[0042] Figure 5B For Figure 5A Partial cross-sectional schematic diagram of the antenna structure shown along the central axis OO';

[0043] Figure 5C For Figure 5A Simulation result diagram of the S11 curve of the antenna structure shown;

[0044] Figure 5D For Figure 5A Simulation result diagram of the gain curve of the antenna structure shown;

[0045] Figure 6A Another planar schematic diagram of the antenna structure according to at least one embodiment of the present disclosure;

[0046] Figure 6B For Figure 6A Partial cross-sectional schematic diagram of the antenna structure shown along the central axis OO';

[0047] Figure 6C For Figure 6A Simulation result diagram of the S11 curve of the antenna structure shown;

[0048] Figure 6D For Figure 6A Simulation result diagram of the gain curve of the antenna structure shown;

[0049] Figure 7 Schematic diagram of an electronic device according to at least one embodiment of the present disclosure;

[0050] Figure 8 Planar schematic diagram of an electronic device according to at least one embodiment of the present disclosure;

[0051] Figure 9 For Figure 8 Partial cross-sectional schematic diagram along the P-P direction in Detailed implementation mode

[0052] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The implementation modes can be implemented in multiple different forms. It is easy for those of ordinary skill in the art to understand the fact that the modes and contents can be transformed into one or more forms without departing from the gist and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited only to the contents described in the following implementation modes. Without conflict, the embodiments and features in the embodiments of the present disclosure can be arbitrarily combined with each other.

[0053] In the drawings, for the sake of clarity, the sizes of one or more constituent elements, the thicknesses of layers, or regions may be exaggerated. Therefore, one aspect of the present disclosure is not necessarily limited to such dimensions, and the shapes and sizes of multiple components in the drawings do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and one aspect of the present disclosure is not limited to the shapes or numerical values shown in the drawings, etc.

[0054] The ordinal numbers such as "first", "second", "third", etc. in the present disclosure are provided to avoid confusion of constituent elements and are not intended to limit in terms of quantity. "Multiple" in the present disclosure means two or more quantities.

[0055] In the present disclosure, for convenience, terms indicating orientation or positional relationships such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationships of constituent elements with reference to the drawings. This is only for the convenience of describing this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present disclosure. The positional relationships of the constituent elements are appropriately changed according to the directions describing the constituent elements. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the circumstances.

[0056] In the present disclosure, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0057] In the present disclosure, "electrically connected" includes the case where constituent elements are connected together through an element having a certain electrical effect. There is no particular limitation on the "element having a certain electrical effect" as long as it can transmit electrical signals between the constituent elements to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having one or more functions.

[0058] In the present disclosure, "parallel" means a state where the angle formed by two straight lines is -10° or more and 10° or less, and thus may include a state where the angle is -5° or more and 5° or less. In addition, "perpendicular" means a state where the angle formed by two straight lines is 80° or more and 100° or less, and thus may include a state where the angle is 85° or more and 95° or less.

[0059] As used in this disclosure, "about" means not strictly defining the boundary and allowing values within the process and measurement error ranges.

[0060] In this disclosure, a microstrip line (MS, Micro-strip) refers to a microwave transmission line composed of a single conductor strip supported on a dielectric substrate.

[0061] At least one embodiment of this disclosure provides an antenna structure, including: a first substrate and a second substrate. There is a dielectric layer between the first substrate and the second substrate. The first substrate includes: a first dielectric substrate, a radiation patch, and a microstrip line disposed on the first dielectric substrate. The radiation patch and the microstrip line are located on a side of the first dielectric substrate away from the second substrate, and the orthographic projection of the microstrip line on the first dielectric substrate does not overlap with the radiation patch. The radiation patch has at least one first slot away from the microstrip line. The second substrate includes: a second dielectric substrate, a feeding structure disposed on a side of the second dielectric substrate close to the first substrate, and a grounding layer disposed on a side of the second dielectric substrate away from the first substrate. The feeding structure is electrically connected to the microstrip line.

[0062] In some exemplary embodiments, the radiation patch is configured to introduce two resonant frequencies and a radiation null between the two resonant frequencies, and the feeding structure is configured to introduce two radiation nulls.

[0063] In this embodiment, by opening a first slot on the radiation patch, two resonant frequencies are introduced, and a radiation null is generated between the two resonant frequencies. Two radiation nulls are introduced by using the feeding structure, thereby realizing a dual-band bandpass filtering antenna structure. The antenna structure of this embodiment can be used for the n77 and n79 frequency bands of 5G, without significantly increasing the antenna profile, without introducing additional discrete devices, and can avoid bringing in a large insertion loss. Moreover, the antenna structure of this embodiment can achieve high passband selectivity and high out-of-band rejection characteristics.

[0064] In some exemplary embodiments, the dielectric layer may include a gas of a single component, or a mixed gas of multiple components, or air. For example, the dielectric layer may be an air layer. However, this embodiment is not limited thereto. The dielectric layer may include other dielectrics with a lower dielectric constant.

[0065] In some exemplary embodiments, the radiation patch has a first edge and a second edge in a first direction. The second edge is adjacent to the microstrip line, and the first edge is away from the microstrip line. The distance between the first slot and the first edge is less than the distance between the first slot and the second edge. The first slot extends in a second direction, and the first direction intersects the second direction. For example, the first direction is perpendicular to the second direction.

[0066] In some examples, the orthographic projection of the microstrip line on the first dielectric substrate may be rectangular. However, this embodiment is not limited thereto.

[0067] In some exemplary embodiments, in a plane parallel to the first substrate, the radiation patch has a notch at the second edge, and at least a part of the microstrip line is located within the notch of the radiation patch. In this example, the notch is formed by the second edge of the radiation patch being recessed towards the direction close to the first slot. In some examples, one end of the microstrip line may extend into the notch of the radiation patch, such that a part of the microstrip line is located within the notch. Alternatively, in some examples, the microstrip line is entirely located within the notch of the radiation patch. However, this embodiment is not limited thereto.

[0068] In some exemplary embodiments, the microstrip line is electrically connected to the feeding structure through a conductive post. In some examples, the orthographic projection of the conductive post on the first dielectric substrate is located within the orthographic projection of the notch of the radiation patch on the first dielectric substrate.

[0069] In some exemplary embodiments, the conductive post is in direct contact with the microstrip line and in direct contact with the feeding structure. In some examples, the conductive post may be in direct contact with the surface of the microstrip line close to the first dielectric substrate and in direct contact with the surface of the feeding structure far from the second dielectric substrate. However, this embodiment is not limited thereto. In some examples, vias may be formed on the feeding structure, and the conductive post may be inserted into the vias of the feeding structure to achieve electrical contact with the feeding structure.

[0070] In some exemplary embodiments, the feeding structure includes: a feeding main body, a first branch and a second branch. The antenna structure has a central axis in the first direction, the feeding main body is located on the central axis, and the first branch and the second branch are symmetrically connected to both sides of the feeding main body with respect to the central axis.

[0071] In some exemplary embodiments, the first branch includes: a first feeding branch, a first open-circuit branch; the first open-circuit branch is electrically connected to the first feeding branch, and the first open-circuit branch is located on the side of the first feeding branch far from the feeding main body. The second branch includes: a second feeding branch, a second open-circuit branch; the second open-circuit branch is electrically connected to the second feeding branch, and the second open-circuit branch is located on the side of the second feeding branch far from the feeding main body. In this example, the first feeding branch and the second feeding branch are symmetric with respect to the central axis, and the first open-circuit branch and the second open-circuit branch are symmetric with respect to the central axis.

[0072] In some exemplary embodiments, the first open-circuit branch and the second open-circuit branch are straight line segments parallel to the central axis, or are in an L shape. However, this embodiment is not limited thereto.

[0073] In some exemplary embodiments, the first stub includes: a first feeding stub, a first open stub, and a first short stub; the second stub includes: a second feeding stub, a second open stub, and a second short stub. The first short stub is located on a side of the first feeding stub away from the first open stub, and the second short stub is located on a side of the second feeding stub away from the second open stub. The first short stub and the second short stub are symmetric about the central axis. The first short stub is electrically connected to the feeding body and the first feeding stub, and the second short stub is electrically connected to the feeding body and the second feeding stub.

[0074] In some exemplary embodiments, the feeding body includes: a first feeding body and a second feeding body that are electrically connected in sequence. The first feeding stub and the second feeding stub are symmetrically connected to two sides of the first feeding body about the central axis. The first stub includes: a first feeding stub, a first open stub, a first short stub, and a third short stub, and the second stub includes: a second feeding stub, a second open stub, a second short stub, and a fourth short stub. The third short stub is located on a side of the first feeding stub close to the second feeding body, and the fourth short stub is located on a side of the second feeding stub close to the second feeding body. The third short stub and the fourth short stub are symmetric about the central axis. The third short stub is connected to the second feeding body and the first feeding stub, and the fourth short stub is connected to the second feeding body and the second feeding stub.

[0075] In some exemplary embodiments, the second feeding body is electrically connected to a microstrip line, and the width of the first feeding body is greater than the width of the second feeding body. In the present disclosure, the width represents the length in a direction perpendicular to the extending direction of the trace.

[0076] In some exemplary embodiments, the extending length of the first short stub is greater than the extending length of the third short stub. In the present disclosure, the extending length represents the length in the extending direction of the trace. In this example, the extending length of the second short stub is greater than the extending length of the fourth short stub.

[0077] In some exemplary embodiments, the third short stub and the fourth short stub may be L-shaped.

[0078] In some exemplary embodiments, the first short stub and the second short stub may be L-shaped.

[0079] In some exemplary embodiments, the radiation patch further has a second slot, and the second slot is located on a side of the first slot close to the microstrip line.

[0080] In some exemplary embodiments, the extending direction of the second slot is parallel to the extending direction of the first slot, and the length of the second slot in the extending direction is less than the length of the first slot in the extending direction.

[0081] In some exemplary embodiments, the radiating patch is connected to the ground layer by a shorting pin, and the shorting pin is close to the microstrip line. The orthographic projection of the shorting pin on the first dielectric substrate is located on one side of the orthographic projection of the first slot on the first dielectric substrate close to the orthographic projection of the microstrip line on the first dielectric substrate.

[0082] In some exemplary embodiments, the orthographic projections of the radiating patch and the feeding structure on the first dielectric substrate may have no overlap.

[0083] The antenna structure of this embodiment is illustrated by multiple examples below.

[0084] Figure 1A It is a schematic plan view of the antenna structure of at least one embodiment of the present disclosure. Figure 1B is Figure 1A A partial cross-sectional schematic view of the antenna structure shown along the central axis OO'. Wherein, the central axis OO' is the central axis of the antenna structure in the second direction D2, and the central axis OO' is parallel to the first direction D1. The first direction D1 and the second direction D2 are in the same plane, and the first direction D1 is perpendicular to the second direction D2.

[0085] In some exemplary embodiments, as Figure 1A and Figure 1B shown, the antenna structure of this exemplary embodiment includes: a first substrate 1 and a second substrate 2. There is a dielectric layer 30 between the first substrate 1 and the second substrate 2. For example, the dielectric layer 30 can be an air layer. In some examples, the first substrate 1 and the second substrate 2 can be connected by a support structure such as a stud, so that there is a certain distance between the first substrate 1 and the second substrate 2 to form the dielectric layer 30. However, this embodiment is not limited thereto. For example, the first substrate 1 and the second substrate 2 can be connected by a sealing adhesive to maintain a certain distance.

[0086] In some exemplary embodiments, as Figure 1A and Figure 1B shown, the first substrate 1 includes: a first dielectric substrate 10, and a radiating patch 12 and a microstrip line 11 disposed on the first dielectric substrate 10. The radiating patch 12 and the microstrip line 11 are located on the side of the first dielectric substrate 10 away from the second substrate 2. The orthographic projections of the radiating patch 12 and the microstrip line 10 on the first dielectric substrate 10 have no overlap. In this example, there is adjacent coupling between the radiating patch 12 and the microstrip line 10. The radiating patch 12 has a first slot 121 away from the microstrip line 11. By opening the first slot 121 away from the microstrip line 11 on the radiating patch 12, two resonant frequency points can be introduced, and a radiation null can be generated between the two resonant frequency points.

[0087] In some exemplary embodiments, as Figure 1A and Figure 1BAs shown, the second substrate 2 includes: a second dielectric substrate 20, a feeding structure 22 disposed on one side of the second dielectric substrate 20 close to the first substrate 1, and a ground layer 21 disposed on one side of the second dielectric substrate 20 away from the first substrate 1. The feeding structure 22 is electrically connected to the microstrip line 11. The microstrip line 11 serves as an excitation port to excite the radiation patch 12. The feeding structure 22 can introduce two radiation nulls, which are located in the high-frequency band and the low-frequency band respectively. The antenna structure provided by this exemplary embodiment can achieve dual-band bandpass filtering.

[0088] In some exemplary embodiments, as Figure 1A shown, the first dielectric substrate 10 and the second dielectric substrate 20 can both be rectangular. For example, the first dielectric substrate 10 and the second dielectric substrate 20 can be rectangular plates of the same size, and their projections on the horizontal plane can coincide. However, this embodiment is not limited thereto. For example, the first dielectric substrate 10 and the second dielectric substrate 20 can be non-rectangular, such as circular, pentagonal, etc. For example, the shapes and sizes of the first dielectric substrate 10 and the second dielectric substrate 20 can be the same or different.

[0089] In some exemplary embodiments, as Figure 1A shown, the radiation patch 12 has a first edge 12a and a second edge 12b in the first direction D1, and a third edge 12c and a fourth edge 12d in the second direction D2. Both ends of the first edge 12a are connected to the third edge 12c and the fourth edge 12d respectively, and both ends of the second edge 12b are connected to the third edge 12c and the fourth edge 12d respectively. The second edge 12b is adjacent to the microstrip line 11, and the first edge 12a is away from the microstrip line 11. The first edge 12a is parallel to the second direction D2. The third edge 12c and the fourth edge 12d are parallel to the first direction D1.

[0090] In some exemplary embodiments, as Figure 1AAs shown, the second edge 12b of the radiation patch 12 includes: a first broken line segment, a first arc segment, a second broken line segment, a second arc segment, and a third broken line segment that are connected in sequence. One end of the first broken line segment is connected to the third edge 12c, and the other end is connected to the first arc segment. One end of the third broken line segment is connected to the second arc segment, and the other end is connected to the fourth edge 12d. The first arc segment is connected between the first broken line segment and the second broken line segment, and the second arc segment is connected between the second broken line segment and the third broken line segment. The first broken line segment includes a first line segment and a second line segment that are connected in sequence. The first line segment is connected to the third edge 12c, and the second line segment is connected to the first arc segment. The second line segment is parallel to the second direction D2, and the extending direction of the first line segment intersects with the first direction D1 and the second direction D2. The second broken line segment includes: a third line segment, a fourth line segment, and a fifth line segment that are connected in sequence. The third line segment is connected to the first arc segment, the fourth line segment is connected between the third line segment and the fifth line segment, and the fifth line segment is connected to the second arc segment. The extending directions of the third line segment and the fifth line segment are parallel to the first direction D1, and the extending direction of the fourth line segment is parallel to the second direction D2. The third broken line segment includes: a sixth line segment and a seventh line segment that are connected in sequence. The sixth line segment is connected to the second arc segment, and the seventh line segment is connected to the fourth edge 12d. The extending direction of the sixth line segment is parallel to the second direction D2, and the extending direction of the seventh line segment intersects with the first direction D1 and the second direction D2. However, this embodiment is not limited thereto. For example, the second edge may not include the first arc segment and the second arc segment, and may be formed by connecting the first broken line segment, the second broken line segment, and the third broken line segment.

[0091] In some exemplary embodiments, as Figure 1A shown, the radiation patch 12 is symmetric about the central axis OO'. The lengths of the third edge 12c and the fourth edge 12d are the same. The lengths of the first line segment of the first broken line segment and the seventh line segment of the third broken line segment are the same, the lengths of the second line segment of the first broken line segment and the sixth line segment of the third broken line segment are the same, the lengths of the third line segment and the fifth line segment of the second broken line segment are the same, and the radian measures of the first arc segment and the second arc segment are the same. However, this embodiment is not limited thereto.

[0092] In some exemplary embodiments, as Figure 1AAs shown, in a plane parallel to the first substrate, the radiation patch 12 has a notch 120. The notch 120 is located at the second edge 12b of the radiation patch 12 and is surrounded by a first arc segment, a second broken line segment, and a second arc segment of the second edge 12b. In this example, the second edge 12b is recessed toward the side close to the first slot 121 to form the notch 120. At least part of the microstrip line 11 is located within the notch 120 of the radiation patch 12 and has a certain spacing from the second edge 12b of the radiation patch 12. The microstrip line 11 is located on the central axis OO' of the antenna structure. In this example, the entire microstrip line 11 is located within the notch 120 of the radiation patch 12 to achieve a compact layout. In some examples, the edge of the microstrip line 11 on the side away from the first slot 121 can be flush with the second line segment of the first broken line segment of the second edge 12b of the radiation patch 12. Or, in the first direction D1, the edge of the microstrip line 11 on the side away from the first slot 121 can be located on the side of the first broken line segment of the second edge 12b of the radiation patch 12 that is close to the first slot 121. However, this embodiment does not limit this. In some examples, one end of the microstrip line 11 can extend into the notch 120 of the radiation patch 12, and the other end of the microstrip line 11 can be located outside the notch 120 of the radiation patch 12.

[0093] In some examples, the orthographic projection of the microstrip line 11 on the first dielectric substrate 10 can be a rectangle. However, this embodiment does not limit this.

[0094] In some exemplary embodiments, as Figure 1A shown, the first slot 121 of the radiation patch 12 is close to the first edge 12a and far from the second edge 12b. In the first direction D1, the distance from the first slot 121 to the first edge 12a is less than the distance from the first slot 121 to the second edge 12b. Among them, in the first direction D1, the vertical distance from the center line of the first slot 121 to the fourth line segment of the second broken line segment of the second edge 12b is greater than the vertical distance from the center line of the first slot 121 to the first edge 12a. The first slot 121 can extend along the second direction D2. For example, the orthographic projection of the first slot 121 on the first dielectric substrate 10 can be a rectangle. However, this embodiment does not limit this. In this exemplary embodiment, a feeding point is formed on the microstrip line 11, and a first slot is formed at a position away from the feeding point, so that the antenna structure changes from single-frequency resonance to dual-frequency resonance.

[0095] In some exemplary embodiments, as Figure 1A and Figure 1BAs shown, the orthographic projection of the radiation patch 12 on the second dielectric substrate 20 does not overlap with the orthographic projection of the feeding structure 22 on the second dielectric substrate 20. The orthographic projection of the microstrip line 11 on the second dielectric substrate 20 overlaps with the orthographic projection of the feeding structure 22 on the second dielectric substrate 20. The grounding layer 21 can cover the surface of the second dielectric substrate 20 on the side away from the first substrate 1. The orthographic projections of the radiation patch 12, the microstrip line 11, and the feeding structure 22 on the second dielectric substrate 20 are all located within the orthographic projection of the grounding layer 21 on the second dielectric substrate 20.

[0096] In some exemplary embodiments, as Figure 1A and Figure 1B shown, the feeding structure 22 and the microstrip line 11 are electrically connected through the conductive post 220. For example, one end of the conductive post 220 can pass through the first dielectric substrate 10 and be in direct contact with the surface of the microstrip line 11 close to the first dielectric substrate 11, and the other end of the conductive post 220 is in direct contact with the surface of the feeding structure 22 away from the second dielectric substrate 20. However, this embodiment is not limited thereto. For example, a metal via can be formed on the feeding structure 22, and one end of the conductive post 220 can extend into the metal via of the feeding structure 22 to achieve electrical connection with the feeding structure 22.

[0097] In some exemplary embodiments, as Figure 1A shown, the orthographic projection of the conductive post 220 on the first dielectric substrate 10 is located within the orthographic projection of the notch 120 of the radiation patch 12 on the first dielectric substrate 10. The conductive post 220 is located on the central axis OO'. The connection position of the conductive post 220 and the microstrip line 11 is the feeding point of the radiation patch 12. In some examples, the orthographic projection of the conductive post 220 on the second dielectric substrate 20 can be circular. However, this embodiment is not limited thereto.

[0098] In some exemplary embodiments, as Figure 1AAs shown, the feeding structure 22 includes: a feeding main body 221, a first branch and a second branch. The first branch includes a first feeding branch 222a and a first open-circuit branch 223a connected in sequence. The second branch includes a second feeding branch 222b and a second open-circuit branch 223b connected in sequence. The feeding structure 22 is symmetric about the central axis OO'. The feeding main body 221 is located on the central axis OO'. The first branch and the second branch are symmetrically connected to both sides of the feeding main body 221 about the central axis OO'. The first feeding branch 222a and the second feeding branch 222b are symmetric about the central axis OO', and the first open-circuit branch 223a and the second open-circuit branch 223b are symmetric about the central axis OO'. The first feeding branch 222a and the second feeding branch 222b extend away from the feeding main body 221 in the second direction D2 respectively. The first open-circuit branch 223a is connected to the first feeding branch 222a, and the second open-circuit branch 223b is connected to the first feeding branch 222b. Both the first open-circuit branch 223a and the second open-circuit branch 223b include a first extension part and a second extension part connected in sequence. The first extension part extends away from the first feeding branch 222a in the first direction D1, and the second extension part extends towards the feeding main body 221 in the second direction D2. As Figure 1A shown, the first open-circuit branch 223a can be in the shape of an L-shaped rotated clockwise by 270 degrees, and the second open-circuit branch 223b can be in the shape of an L-shaped rotated counterclockwise by 90 degrees. There is coupling between the first feeding branch 222a and the second feeding branch 222b and the second edge 12b of the radiation patch 12, between the first open-circuit branch 223a and the third edge 12c of the radiation patch 12, and between the second open-circuit branch 223b and the fourth edge 12d of the radiation patch 12. The feeding structure 22 of the present exemplary embodiment can introduce a high-frequency radiation null and a low-frequency radiation null.

[0099] In some exemplary embodiments, as Figure 1A shown, the orthographic projection of the first end of the feeding main body 221 on the second dielectric substrate 20 is inserted into the orthographic projection of the notch 120 of the radiation patch 12 on the second dielectric substrate 20. The first end of the feeding main body 221 is arc-shaped. In some examples, the center of the arc shape corresponding to the first end of the feeding main body 221 can coincide with the center of the conductive post 220. However, the present embodiment does not limit this.

[0100] In the present disclosure, the first length represents the length along the first direction D1, and the second length represents the length along the second direction D2. The width represents the length in the direction perpendicular to the extending direction of the trace.

[0101] In some exemplary embodiments, as Figure 1AAs shown, the widths (i.e., the first lengths) of the first feeding stub 222a and the second feeding stub 222b are less than the width (i.e., the second length) of the feeding body 221. The width of the first open stub 223a is less than the width of the first feeding stub 222a, and the width of the second open stub 223b is less than the width of the first feeding stub 222b. There is an impedance transformation from the feeding body 221 to the two feeding stubs, realizing a stepped impedance transformation structure. In the present exemplary embodiment, the out-of-band rejection characteristic and selectivity of the antenna structure are adjusted by the stepped impedance transformation structure and the open stubs.

[0102] In some exemplary embodiments, the first substrate 1 and the second substrate 2 may be printed circuit boards (PCBs, Printed Circuit Boards). The first substrate 1 and the second substrate 2 may be obtained by a circuit board manufacturing process. However, the present embodiment is not limited thereto.

[0103] Figure 1C is Figure 1A the simulation result diagram of the S11 curve of the antenna structure shown. Figure 1D is Figure 1A the simulation result diagram of the gain curve of the antenna structure shown. In the present disclosure, the planar size is expressed as the first length * the second length, the first length is the length along the first direction D1, and the second length is the length along the second direction D2. The thickness is the length in the direction perpendicular to the plane where the first direction D1 and the second direction D2 are located.

[0104] In some exemplary embodiments, the dielectric constant dk / dielectric loss df of the first dielectric substrate 10 and the second dielectric substrate 20 is about 2.65 / 0.002. The thickness of the first dielectric substrate 10 is about 1.44 mm to 1.76 mm, for example about 1.6 mm, and the thickness of the second dielectric substrate 20 is about 0.45 mm to 0.55 mm, for example about 0.5 mm. The thickness of the dielectric layer 30 between the first dielectric substrate 10 and the second dielectric substrate 20 is about 2.7 mm to 3.3 mm, for example about 3.0 mm. The thicknesses of the microstrip line 11, the radiation patch 12, the ground layer 21, and the feeding structure 22 may be about 16.2 microns to 19.8 microns, for example about 18 microns. The microstrip line 11, the radiation patch 12, the ground layer 21, and the feeding structure 22 may be made of a metal material with better conductivity. For example, it may be any one or more of gold (Au), silver (Ag), copper (Cu), and aluminum (Al), or an alloy made of any one or more of the above metals. In some examples, the material of the microstrip line 11, the radiation patch 12, the ground layer 21, and the feeding structure 22 may be copper (Cu). The center frequency point f0 of the antenna simulation is about 4 GHz, and the corresponding vacuum wavelength is λ0.

[0105] In some exemplary embodiments, asFigure 1A As shown, the planar dimensions of the first dielectric substrate 10 and the second dielectric substrate 20 are approximately 45.0 mm * 50.0 mm. The length a1 of the first edge 12a of the radiation patch 12 is approximately 28.0 mm; the lengths a2 of the third edge 12c and the fourth edge 12d of the radiation patch 12 are approximately 23.4 mm; the lengths a3 of the first line segment of the first folding segment and the seventh line segment of the third folding segment of the second edge 12b of the radiation patch 12 are both approximately 3.7 mm, the lengths a4 of the second line segment of the first folding segment and the sixth line segment of the third folding segment of the second edge 12b are both approximately 6.5 mm, the length a5 of the third line segment and the fifth line segment of the second folding segment of the second edge 12b is approximately 5.4 mm, the length a6 of the fourth line segment of the second folding segment of the second edge 12b is approximately 4.6 mm, and the radii of the first arc segment and the second arc segment of the second edge 12b are approximately 2.6 mm. The planar dimensions of the first slot 121 of the radiation patch 12 are approximately 1.0 mm * 25.5 mm. The distance a7 from the first slot 121 to the first edge 12a is approximately 1.5 mm. The planar dimensions of the microstrip line 11 are approximately 7.0 mm * 2.6 mm, and the spacing between the microstrip line 11 and the radiation patch 12 is approximately 1.0 mm. The radius of the conductive post 220 is approximately 0.8 mm, and the distance from the center of the conductive post 220 to the fourth line segment of the second folding segment of the second edge 12b of the radiation patch 12 is approximately 5.4 mm. The second length b1 of the feeding body 221 of the feeding structure 12 is approximately 4.2 mm, the distance b2 from the second end of the feeding body 221 to the first feeding branch 222a is approximately 9.0 mm, the distance b3 from the center of the arc shape at the first end of the feeding body 221 to the first feeding branch 222a is approximately 5.0 mm, and the radius of the arc shape at the first end of the feeding body 221 is approximately 2.1 mm. The second lengths b4 of the first feeding branch 222a and the second feeding branch 222b are approximately 16.0 mm, and the first length b5 is approximately 2.4 mm. The first lengths b6 of the first extending portions of the first open circuit branch 223a and the second open circuit branch 223b are approximately 9.8 mm, the second length is approximately 0.3 mm, the second lengths b7 of the second extending portions are approximately 3.0 mm, and the first length is approximately 0.3 mm. That is, the widths of the first open circuit branch 223a and the second open circuit branch 223b are approximately 0.3 mm.

[0106] In some exemplary embodiments, as Figure 1C shown, the impedance bandwidth of the antenna structure at -6 dB is approximately 3.33 GHz to 3.68 GHz, 4.61 GHz to 4.75 GHz. As Figure 1DAs shown, the gain bandwidth of the antenna structure is approximately 2.99 GHz to 3.95 GHz and 4.53 GHz to 5.06 GHz at 0 dBi. The out-of-band rejection at low frequency and high frequency is -18 dBi and -8.1 dBi respectively, and the selectivity in the passband is -16 dBi and -15 dBi respectively. The gain bandwidth of the antenna structure of this exemplary embodiment can cover the n77 and n79 frequency bands, and has good out-of-band rejection characteristics and high passband selectivity.

[0107] Figure 2A This is another schematic plan view of the antenna structure according to at least one embodiment of the present disclosure. Figure 2B is Figure 2A The simulation result diagram of the S11 curve of the antenna structure shown. Figure 2C is Figure 2A The simulation result diagram of the gain curve of the antenna structure shown. In some exemplary embodiments, as Figure 2A shown, both the first open stub 223a and the second open stub 223b of the feeding structure 221 only have a first extension portion extending along the first direction D1. In this example, the first open stub 223a and the second open stub 223b are straight line segments parallel to the central axis OO'. The remaining structures of the antenna structure of this exemplary embodiment can refer to the description of the foregoing embodiment, so they will not be elaborated here.

[0108] In some examples, the first length of the first extension portion of the first open stub 223a and the second open stub 223b is approximately 9.8 mm, and the second length is approximately 0.3 mm. For the remaining parameters of the antenna structure of this embodiment, reference can be made to Figure 1A the description of the embodiment shown, so they will not be elaborated here.

[0109] In some exemplary embodiments, as Figure 2B shown, the impedance bandwidth of the antenna structure at -6 dB is approximately 3.17 GHz to 3.77 GHz and 4.70 GHz to 4.96 GHz. As Figure 2C shown, the gain bandwidth of the antenna structure at 0 dBi is approximately 3.11 GHz to 4.02 GHz and 4.56 GHz to 5.68 GHz. The out-of-band rejection at low frequency and high frequency is -19.4 dBi and -4.8 dBi respectively, and the selectivity in the passband is -16 dBi and -16 dBi respectively. The gain bandwidth of the antenna structure of this exemplary embodiment can cover the n77 and n79 frequency bands, and has good out-of-band rejection characteristics and high passband selectivity. Compared with Figure 1ACompared with the simulation results of the antenna structure shown, the high-frequency gain bandwidth of the antenna structure of this example is significantly increased, and the gain flatness within the passband is good, but the suppression outside the high-frequency band deteriorates. In this example, there is adjacent coupling between the first open stub 223a and the third edge 12c of the radiation patch 12, and there is adjacent coupling between the second open stub 223b and the fourth edge 12d of the radiation patch 12. Compared with Figure 1A the antenna structure shown, in the antenna structure of this example, the end coupling area between the first open stub 223a and the third edge 12c increases, and the end coupling area between the second open stub 223b and the fourth edge 12d increases, resulting in enhanced coupling, thereby leading to an increase in the gain bandwidth but deterioration of the suppression outside the high-frequency band.

[0110] Figure 3A Another schematic plan view of the antenna structure according to at least one embodiment of the present disclosure. Figure 3B is Figure 3A a simulation result diagram of the S11 curve of the antenna structure shown. Figure 3C is Figure 3A a simulation result diagram of the gain curve of the antenna structure shown. In some exemplary embodiments, as Figure 3A shown, the feeding structure includes: a feeding main body 221, a first stub and a second stub. The feeding main body 221 is located on the central axis OO'. The first stub and the second stub are symmetrically connected to both ends of the feeding main body 221 with respect to the central axis OO'. The first stub includes: a first feeding stub 222a, a first open stub 223a and a first shorting stub 224a, and the second stub includes: a second feeding stub 222b, a second open stub 223b and a second shorting stub 224b. The first feeding stub 222a and the second feeding stub 222b are symmetric with respect to the central axis OO', the first open stub 223a and the second open stub 223b are symmetric with respect to the central axis OO', and the first shorting stub 224a and the second shorting stub 224b are symmetric with respect to the central axis OO'. The first shorting stub 224a is respectively connected to the feeding main body 221 and the first feeding stub 222a, and the second shorting stub 223b is respectively connected to the feeding main body 221 and the second feeding stub 222b. The first shorting stub 224a and the second shorting stub 224b are located on the side of the corresponding feeding stub away from the open stub. The first shorting stub 224a and the second shorting stub 224b both include a third extension part and a fourth extension part connected in sequence. The third extension part is connected to the feeding main body 221, and the fourth extension part is connected to the corresponding feeding stub. The third extension part extends in the second direction D2 away from the feeding main body 221, and the fourth extension part extends in the first direction D1 towards the feeding stub. The second shorting stub 224a can be an inverted L shape, and the second shorting stub 224b can be an L shape.

[0111] In some exemplary embodiments, as Figure 3A shown, the second length of the gap between the first shorting stub 224a and the first feeding stub 222a is greater than the first length, and the second length of the gap between the second shorting stub 224a and the second feeding stub 222b is greater than the first length. However, in this embodiment, the shape change of the gap between the first shorting stub 224a and the first feeding stub 222a is not limited, as long as the extended length of the first shorting stub 224a (i.e., the sum of the second length of the third extension and the first length of the fourth extension) remains unchanged; the shape change of the gap between the second shorting stub 224b and the second feeding stub 222b is not limited, as long as the extended length of the second shorting stub 224b remains unchanged.

[0112] This exemplary embodiment adjusts the out-of-band rejection characteristics and selectivity of the antenna structure through a stepped impedance transformation structure, open stubs, and shorting stubs. For the remaining structures of the antenna structure in this exemplary embodiment, reference can be made to Figure 2A the description of the embodiment shown, and thus will not be elaborated here.

[0113] In some exemplary embodiments, the second length of the third extension of the first shorting stub 224a and the second shorting stub 224b is approximately 10.0 mm, and the first length is approximately 0.3 mm; the first length of the fourth extension is approximately 2.3 mm, and the second length is approximately 0.3 mm. The distance c1 between the second end of the feeding body 221 and the first shorting stub 224a is approximately 6.7 mm. For the remaining parameters of the antenna structure in this embodiment, reference can be made to Figure 1A the description of the embodiment shown, and thus will not be elaborated here.

[0114] In some exemplary embodiments, as Figure 3B shown, the impedance bandwidth of the antenna structure at -6 dB is approximately 3.18 GHz to 3.76 GHz, 4.59 GHz to 4.81 GHz. As Figure 3C shown, the gain bandwidth of the antenna structure at 0 dBi is approximately 3.14 GHz to 4.01 GHz, 4.48 GHz to 5.49 GHz. The out-of-band rejection at low frequency and high frequency is -16.4 dBi and -7.2 dBi respectively, and the selectivity in the passband is -15 dBi and -15 dBi respectively. The gain bandwidth of the antenna structure in this exemplary embodiment can cover the n77 and n79 frequency bands, and has good out-of-band rejection characteristics, high passband selectivity, and good gain flatness in the passband. Compared with Figure 2A the simulation results of the antenna structure shown, the out-of-band rejection at low frequency of the antenna structure in this example is improved. In this example, by introducing a pair of shorting stubs into the feeding structure, the out-of-band rejection characteristics at low frequency can be significantly improved. In Figure 1AIn the antenna structure shown, there is adjacent coupling between the first feeding branch 222a and the first broken line segment and the first arc segment of the second edge 12b of the radiation patch 12, and there is adjacent coupling between the second feeding branch 222b and the second arc segment and the third broken line segment of the second edge 12b of the radiation patch 12, as Figure 1C shown, there is an inconspicuous resonance peak between 3.0 GHz and 3.33 GHz. In the antenna structure of this example, by introducing the first short - circuit branch 224a and the second short - circuit branch 224b, the current distribution on the first feeding branch 222a and the second feeding branch 222b is changed, such that as Figure 3B shown, there is an obvious resonance peak between 3.18 GHz and 3.29 GHz, thereby enhancing the low - frequency out - of - band suppression characteristic of the antenna structure.

[0115] Figure 4A This is another schematic plan view of the antenna structure of at least one embodiment of the present disclosure. Figure 4B It is Figure 4A a schematic simulation diagram of the S11 curve of the antenna structure shown. Figure 4C It is Figure 4A a simulation result diagram of the gain curve of the antenna structure shown. In some exemplary embodiments, as Figure 4A shown, the second edge 12b of the radiation patch 12 includes a first straight line segment, a first arc segment, a broken line segment, a second arc segment, and a second straight line segment connected in sequence. The broken line segment includes a third line segment, a fourth line segment, and a fifth line segment connected in sequence.

[0116] In some exemplary embodiments, as Figure 4A shown, the feeding structure includes: a feeding main body 221, a first branch, and a second branch. The feeding main body 221 is located on the central axis OO'. The feeding main body 221 includes: a first feeding main body 221a and a second feeding main body 221b connected in sequence. The first end of the second feeding main body 221b is connected to the first feeding main body 221a, the second end of the second feeding main body 221b has an arc shape, and is electrically connected to the microstrip line 11 through a conductive column 220. The center of the arc shape corresponding to the second end of the second feeding main body 221b may coincide with the center of the conductive column 220. However, this embodiment does not limit this. In this example, the width (i.e., the second length) of the second feeding main body 221b is less than the width (i.e., the second length) of the first feeding main body 221a. When the width narrows from the first feeding main body 221a to the second feeding main body 221b, there is a primary impedance transformation, and the current distribution here is discontinuous.

[0117] In some exemplary embodiments, as Figure 4AAs shown, the first stub and the second stub are symmetrically connected to both ends of the feeding main body 221 with respect to the central axis OO'. The first stub includes: a first feeding stub 222a, a first open stub 223a, a first short-circuit stub 224a, and a third short-circuit stub 225a; the second stub includes: a second feeding stub 222b, a second open stub 223b, a second short-circuit stub 224b, and a fourth short-circuit stub 225b. The first feeding stub 222a and the second feeding stub 222b are symmetric with respect to the central axis OO', the first open stub 223a and the second open stub 223b are symmetric with respect to the central axis OO', the first short-circuit stub 224a and the second short-circuit stub 224b are symmetric with respect to the central axis OO', and the third short-circuit stub 225a and the fourth short-circuit stub 225b are symmetric with respect to the central axis OO'. The first short-circuit stub 224a is respectively connected to the first feeding main body 221a and the first feeding stub 222a, the second short-circuit stub 224b is respectively connected to the first feeding main body 221a and the second feeding stub 222b, the third short-circuit stub 225a is respectively connected to the first feeding stub 222a and the second feeding main body 221b, and the fourth short-circuit stub 225b is respectively connected to the second feeding stub 222b and the second feeding main body 221b.

[0118] In some exemplary embodiments, as Figure 4A shown, the first short-circuit stub 224a and the second short-circuit stub 224b are located on the side of the corresponding feeding stub away from the open stub, and the third short-circuit stub 225a and the fourth short-circuit stub 225b are located on the side of the corresponding feeding stub close to the open stub. The third short-circuit stub 225a and the fourth short-circuit stub 225b both include a fifth extension portion and a sixth extension portion connected in sequence. The fifth extension portion extends in the first direction D1 away from the corresponding feeding stub, and the sixth extension portion extends in the second direction D2 toward the second feeding main body 221b. The third short-circuit stub 225a can be in the shape of an L-shaped rotated clockwise by 270 degrees, and the fourth short-circuit stub 225b can be in the shape of an L-shaped rotated counterclockwise by 90 degrees.

[0119] Figure 4A The extended length of the first short-circuit stub 224a of the antenna structure shown (i.e., the sum of the second length of the third extension portion and the first length of the fourth extension portion) can be approximately equal to Figure 3A the extended length of the first short-circuit stub 224a of the antenna structure shown. Compared with Figure 3A the antenna structure of the embodiment shown, as Figure 4A shown, the distance between the first short-circuit stub 224a and the first feeding stub 222a of the antenna structure of this example is narrowed, and the distance between the second short-circuit stub 224b and the second feeding stub 222b is narrowed.

[0120] In some exemplary embodiments, as Figure 4AAs shown, the first length of the gap between the third short - circuit stub 225a and the first feeding stub 222a is greater than the second length, and the first length of the gap between the fourth short - circuit stub 225b and the second feeding stub 222b is greater than the second length. However, in this embodiment, the shape change of the gap between the third short - circuit stub 225a and the first feeding stub 222a is not limited, as long as the extended length of the third short - circuit stub 225a (i.e., the sum of the first length of the fifth extension part and the second length of the sixth extension part) remains unchanged; the shape change of the gap between the fourth short - circuit stub 225b and the second feeding stub 222b is not limited, as long as the extended length of the fourth short - circuit stub 225b remains unchanged.

[0121] In this exemplary embodiment, the orthographic projection of the third short - circuit stub 225a and the fourth short - circuit stub 225b on the first dielectric substrate 10 does not overlap with the orthographic projection of the radiation patch 12 on the first dielectric substrate 10, which can avoid introducing new resonant frequencies due to their overlap.

[0122] In some exemplary embodiments, compared with Figure 3A the antenna structure shown, Figure 4A the first length of the first slot 121 of the radiation patch 12 of the antenna structure shown increases, and the second length decreases.

[0123] This exemplary embodiment changes the surface current distribution of the feeding structure through a stepped - impedance transformation structure, an open - circuit stub, and a short - circuit stub, thereby adjusting the out - of - band rejection characteristics and selectivity of the antenna structure.

[0124] The remaining structures of the antenna structure of this exemplary embodiment can refer to the description of the embodiment shown in Figure 3A and will not be elaborated here.

[0125] In some exemplary embodiments, such as Figure 4AAs shown, the lengths of the first straight segment and the second straight segment of the second edge 12b of the radiation patch 12 are approximately 9.1 mm, and the lengths of the third edge 12c and the fourth edge 12d are approximately 26.0 mm. The planar size of the first slot 121 of the radiation patch 12 is approximately 3.0 mm * 23.5 mm. The second length of the first feeding body 221a is approximately 4.2 mm, and the second length of the second feeding body 221b is approximately 2.4 mm. The distance from the center of the conductive post 220 to the fourth segment of the broken line of the second edge 12b of the radiation patch 12 is approximately 5.4 mm. The distance d1 between the second end of the first feeding body 221a and the first shorting stub 224a is approximately 8.4 mm. The second length of the third extension of the first shorting stub 224a and the second shorting stub 224b is approximately 10.0 mm, and the first length is approximately 0.3 mm; the first length of the fourth extension is approximately 0.9 mm, and the second length is approximately 0.3 mm. For the remaining parameters of the antenna structure of this embodiment, reference can be made to Figure 3A the description of the embodiment shown, and thus will not be elaborated here.

[0126] In some exemplary embodiments, as Figure 4B shown, the impedance bandwidth of the antenna structure at -6 dB is approximately 3.21 GHz to 3.60 GHz, 4.79 GHz to 4.92 GHz. As Figure 4C shown, the gain bandwidth of the antenna structure at 0 dBi is approximately 3.15 GHz to 3.89 GHz, 4.70 GHz to 5.09 GHz, and the out-of-band rejection at low frequency and high frequency is -16.5 dBi and -7.7 dBi respectively, and the selectivity of the passband is -16 dBi and -13 dBi respectively. The gain bandwidth of the antenna structure of this exemplary embodiment can only cover part of the n77 and n79 frequency bands, and has good out-of-band rejection characteristics and high passband selectivity. Compared with Figure 3A the simulation results of the antenna structure shown, the gain bandwidth of the antenna structure of this example at 0 dBi is reduced, and the gain bandwidth at high frequency is significantly reduced. Compared with Figure 3A the antenna structure shown, in the antenna structure of this example, introducing another pair of shorting stubs in the feeding structure will significantly change the performance of the antenna in the high-frequency passband. In this example, there is adjacent coupling between the second feeding body 221b and the microstrip line 11. By introducing the third shorting stub 225a and the fourth shorting stub 225b, the current distribution at the second feeding body 221b can be adjusted, thereby changing the coupling degree between the second feeding body 221b and the microstrip line 11, and further changing the resonance characteristics of the antenna at high frequency.

[0127] Figure 5A This is another planar schematic diagram of the antenna structure of at least one embodiment of the present disclosure. Figure 5B It is Figure 5A a partial cross-sectional schematic diagram of the antenna structure shown along the central axis.Figure 5C The Figure 5A simulation schematic diagram of the S11 curve of the antenna structure shown. Figure 5D The Figure 5A simulation result diagram of the gain curve of the antenna structure shown. In some exemplary embodiments, as Figure 5A and Figure 5B shown, the radiation patch 12 has a first slot 121 and a second slot 122. The first slot 121 is located on the side of the second slot 122 away from the microstrip line 11. The first slot 121 is away from the microstrip line 11, and the second slot 122 is close to the microstrip line 11. The length of the first slot 121 along the second direction D2 (i.e., the second length) is greater than the length of the second slot 122 along the second direction D2. The second slot 122 is symmetric about the central axis OO’. The orthographic projection of the second slot 122 on the first dielectric substrate 10 can be a rectangle. In some examples, the second length of the second slot 122 is greater than the second length of the notch 120 (i.e., the length of the fourth line segment of the second edge 12b of the radiation patch 12), and greater than the width of the first feeding body 221a. However, this embodiment does not limit this. The remaining structure of the antenna structure of this exemplary embodiment can refer to Figure 4A the description of the embodiment shown, so it will not be elaborated here.

[0128] In some exemplary embodiments, the planar size of the second slot 122 of the radiation patch 12 is about 1mm * 6mm. The distance between the second slot 122 and the fourth line segment of the second edge 12b in the first direction D1 is about 1mm, and the distance between the second slot 122 and the first slot 121 in the first direction D1 is about 11.5mm. For the remaining parameters of the antenna structure of this embodiment, reference can be made to Figure 4A the description of the embodiment shown, so it will not be elaborated here.

[0129] In some exemplary embodiments, as Figure 5C shown, the impedance bandwidth of the antenna structure at -6dB is about 3.20GHz to 3.59GHz, 4.78GHz to 4.92GHz. As Figure 5D shown, the gain bandwidth of the antenna structure at 0dBi is about 3.15GHz to 3.89GHz, 4.69GHz to 5.09GHz, the out-of-band rejection at low frequency and high frequency is -16.5dBi and -8dBi respectively, and the selectivity of the passband is -16dBi and -13.5dBi respectively. The gain bandwidth of the antenna structure of this exemplary embodiment can only cover part of the n77 and n79 frequency bands, has good out-of-band rejection characteristics and high passband selectivity. Compared with Figure 4A the simulation results of the antenna structure shown, the gain bandwidth at 0dBi and the impedance bandwidth at -6dB of the antenna structure of this example are basically the same. Compared with Figure 4ACompared with the antenna structure shown, in this example, introducing a second slot on one side of the radiation patch close to the microstrip line does not significantly affect the antenna performance.

[0130] Figure 6A Another schematic diagram of the antenna structure according to at least one embodiment of the present disclosure. Figure 6B is Figure 6A A partial cross-sectional schematic diagram of the antenna structure shown along the central axis. Figure 6C is Figure 6A The simulation result diagram of the S11 curve of the antenna structure shown. Figure 6D is Figure 5A The simulation result diagram of the gain curve of the antenna structure shown. In some exemplary embodiments, such as Figure 6A and Figure 6B shown, the radiation patch 12 is connected to the ground layer 21 through a shorting pin 123. The orthographic projection of the shorting pin 123 on the first dielectric substrate 10 is close to the orthographic projection of the microstrip line 11 on the first dielectric substrate 10 and far from the orthographic projection of the first slot 121 on the first dielectric substrate 10. The shorting pin 123 is located on the central axis OO'. The orthographic projection of the shorting pin 123 on the first dielectric substrate 10 can be circular. However, this embodiment is not limited thereto. The remaining structure of the antenna structure of this exemplary embodiment can be referred to the description of the embodiment shown in Figure 4A shown, so it will not be elaborated here.

[0131] In some exemplary embodiments, the radius of the shorting pin 123 can be about 0.2 mm. The distance between the shorting pin 123 and the second edge 12b can be about 1 mm. For the remaining parameters of the antenna structure of this embodiment, reference can be made to the description of the embodiment shown in Figure 4A shown, so it will not be elaborated here.

[0132] In some exemplary embodiments, such as Figure 6C shown, the impedance bandwidth of the antenna structure at -6 dB is about 3.21 GHz to 3.70 GHz, 4.78 GHz to 4.91 GHz. As Figure 6D shown, the gain bandwidth of the antenna structure at 0 dBi is about 3.15 GHz to 4.03 GHz, 4.68 GHz to 5.07 GHz, and the out-of-band rejection at low frequency and high frequency is -16.7 dBi and -8.7 dBi respectively, and the selectivity of the passband is -14 dBi and -11 dBi respectively. The gain bandwidth of the antenna structure of this exemplary embodiment can only cover part of the n77 and n79 frequency bands. Compared with the simulation result of the antenna structure shown in Figure 4A shown, the gain bandwidth at 0 dBi and the impedance bandwidth at -6 dB of the antenna structure of this example are basically the same, but the selectivity of the passband of the antenna deteriorates. Compared with Figure 4ACompared with the shown antenna structure, in this example, introducing shorting pins between the radiation patch and the ground plane will deteriorate the antenna performance, and the influence of the diameter size of the shorting pins on the performance can be ignored.

[0133] The antenna structure provided by this exemplary embodiment introduces two resonant frequencies by opening a first slot away from the microstrip line on the radiation patch, and generates a radiation null between the two resonant frequencies. By designing the feeding structure, a radiation null is introduced at high frequency and low frequency respectively, so as to realize an antenna structure with dual-band bandpass filtering. This exemplary embodiment changes the surface current distribution of the radiation patch and the feeding structure through planar structure design, so as to realize the filtering function. The antenna structure provided by this embodiment can be applied to the n77 and n79 frequency bands of 5G. The antenna structure of this embodiment can achieve high gain and wide gain bandwidth in the first passband, and can achieve high passband selectivity and high out-of-band rejection characteristics.

[0134] Figure 7 Schematic diagram of an electronic device according to at least one embodiment of the present disclosure. As Figure 7 shown, this embodiment provides an electronic device 91, including: an antenna structure 922. The electronic device 91 can be: a mobile phone, a navigation device, a game console, a television (TV), a car audio, a tablet computer, a personal multimedia player (PMP), a personal digital assistant (PDA), etc., any product or component with communication functions. However, this embodiment is not limited thereto.

[0135] Figure 8 Planar schematic diagram of an electronic device according to at least one embodiment of the present disclosure. Figure 9 is Figure 8 Partial cross-sectional schematic diagram along the P-P direction in. In some exemplary embodiments, taking the electronic device 91 as a display device as an example. As Figure 8 shown, in the plane parallel to the electronic device, the electronic device 91 includes: a battery area 910, a first area 911 and a second area 912 located on both sides of the battery area 910. In some examples, a battery is provided in the battery area 910. The antenna structure 922 can be provided in at least one of the first area 911 and the second area 912. However, this embodiment is not limited thereto. In some examples, the antenna structure can be provided in the area between the first area 911 and the frame of the electronic device 91, or in the area between the second area 912 and the frame of the electronic device 91.

[0136] In some exemplary embodiments, taking the antenna structure 922 provided in the first area 911 as an example. As Figure 9As shown, in a plane perpendicular to the electronic device, the electronic device 91 includes: a rear cover 921, an antenna structure 922, a housing 923, a printed circuit board 924, a display screen 925, and a glass cover plate 926. The glass cover plate 926 is closely attached to the display screen 925 and can play a role in dust prevention for the display screen 925. The housing 923 mainly plays a role in supporting the whole machine. The antenna structure 922 can be disposed on the rear cover 921 and is connected to the printed circuit board 924 through an opening on the housing 923. However, this embodiment is not limited thereto.

[0137] The drawings in the present disclosure only relate to the structures involved in the present disclosure, and other structures can refer to the general design. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0138] Those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and should all be covered within the scope of the claims of the present disclosure.

Claims

1. An antenna structure, comprising: A first substrate and a second substrate, with a dielectric layer between the first substrate and the second substrate; The first substrate includes: a first dielectric substrate, a radiation patch and a microstrip line disposed on the first dielectric substrate; the radiation patch and the microstrip line are located on a side of the first dielectric substrate away from the second substrate; the microstrip line and the radiation patch have no overlap in the orthographic projection on the first dielectric substrate, and the radiation patch has at least one first slot away from the microstrip line; The second substrate includes: a second dielectric substrate, a feeding structure disposed on a side of the second dielectric substrate close to the first substrate, and a grounding layer disposed on a side of the second dielectric substrate away from the first substrate; the feeding structure is electrically connected to the microstrip line; The feeding structure includes: a feeding body, a first branch and a second branch; the antenna structure has a central axis in a first direction, the feeding body is located on the central axis, and the first branch and the second branch are symmetrically connected to both sides of the feeding body with respect to the central axis; The first branch includes: a first feeding branch, a first open circuit branch and a first short circuit branch, the first open circuit branch is electrically connected to the first feeding branch, and the first open circuit branch is located on a side of the first feeding branch away from the feeding body, the first short circuit branch is located on a side of the first feeding branch away from the first open circuit branch, and the first short circuit branch is electrically connected to the feeding body and the first feeding branch; The second branch includes: a second feeding branch, a second open circuit branch and a second short circuit branch; the second open circuit branch is electrically connected to the second feeding branch, and the second open circuit branch is located on a side of the second feeding branch away from the feeding body, the second short circuit branch is located on a side of the second feeding branch away from the second open circuit branch, and the second short circuit branch is electrically connected to the feeding body and the second feeding branch; the first short circuit branch and the second short circuit branch are symmetric with respect to the central axis; The second length of the gap between the first short circuit branch and the first feeding branch is greater than the first length, the second length of the gap between the second short circuit branch and the second feeding branch is greater than the first length, the first length is the length along the first direction, the second length is the length along the second direction, and the first direction intersects the second direction.

2. The antenna structure according to claim 1, wherein, The radiation patch is configured to introduce two resonant frequencies and a radiation null point located between the two resonant frequencies, and the feeding structure is configured to introduce two radiation null points.

3. The antenna structure according to claim 1, wherein, The radiation patch has a first edge and a second edge in the first direction; the second edge is adjacent to the microstrip line, and the first edge is away from the microstrip line; the distance between the first slot and the first edge is less than the distance between the first slot and the second edge; The first slot extends along the second direction, and the first direction intersects the second direction.

4. The antenna structure according to claim 3, wherein, In a plane parallel to the first substrate, the radiation patch has a notch at the second edge, and at least a part of the microstrip line is located in the notch of the radiation patch.

5. The antenna structure according to any one of claims 1 to 4, wherein, The microstrip line is electrically connected to the feeding structure through a conductive post.

6. The antenna structure according to claim 5, wherein, The conductive post is in direct contact with the microstrip line and in direct contact with the feeding structure.

7. The antenna structure according to claim 1, wherein, The first open stub and the second open stub are straight line segments parallel to the central axis.

8. The antenna structure according to claim 1, wherein, The first open stub and the second open stub are L-shaped.

9. The antenna structure according to claim 1, wherein, The feeding body includes: a first feeding body and a second feeding body which are electrically connected in sequence; the first feeding stub and the second feeding stub are symmetrically connected to both sides of the first feeding body with respect to the central axis; The first stub further includes: a third shorting stub, and the third shorting stub is located on a side of the first feeding stub close to the second feeding body; The second stub further includes: a fourth shorting stub, and the fourth shorting stub is located on a side of the second feeding stub close to the second feeding body; The third shorting stub and the fourth shorting stub are symmetric with respect to the central axis, the third shorting stub is connected to the second feeding body and the first feeding stub, and the fourth shorting stub is connected to the second feeding body and the second feeding stub.

10. The antenna structure according to claim 9, wherein, The second feeding body is electrically connected to the microstrip line, and the width of the first feeding body is greater than the width of the second feeding body.

11. The antenna structure according to claim 9, wherein, The extended length of the first shorting stub is greater than the extended length of the third shorting stub.

12. The antenna structure according to any one of claims 9 to 11, wherein, The third shorting stub and the fourth shorting stub are L-shaped.

13. The antenna structure according to claim 1, wherein, The first shorting stub and the second shorting stub are L-shaped.

14. The antenna structure according to claim 1, wherein, The radiation patch further has a second slot, and the second slot is located on a side of the first slot close to the microstrip line.

15. The antenna structure according to claim 14, wherein, The extending direction of the second slot is parallel to the extending direction of the first slot, and the length of the second slot in the extending direction is less than the length of the first slot in the extending direction.

16. The antenna structure according to claim 1, wherein, The radiation patch is connected to the ground layer by a shorting pin, and the shorting pin is close to the microstrip line.

17. The antenna structure according to claim 1, wherein, The orthographic projections of the radiation patch and the feeding structure on the first dielectric substrate do not overlap.

18. An electronic device, comprising the antenna structure according to any one of claims 1 to 17.

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