Antenna structure and electronic equipment

Abstract

The invention relates to the technical field of wireless communication, and relates to an antenna structure and electronic equipment. The antenna structure comprises a first metal surface, and a first metal strip extending in a first length direction is arranged on a first side edge of the first metal surface; the second metal surface is located on the lower side of the first metal surface, the projection of the second metal surface and the projection of the first metal surface in the thickness direction of the antenna structure are at least partially overlapped, and a first gap is formed between the second metal surface and the first metal surface; a second metal strip extending in a second length direction is arranged on a second side edge, opposite to the first side edge, of the second metal surface, and the second length direction is opposite to the first length direction; the first connecting piece is connected with the third side edge of the first metal surface and the fourth side edge of the second metal surface; and the feed point is positioned on the first metal surface or the second metal surface. According to the antenna structure and the electronic equipment provided by the invention, the defects that an existing circularly polarized antenna is complex in structure and large in occupied space in the thickness direction, and the application scene of the electronic equipment is limited are overcome.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communication technology, and in particular to an antenna structure and electronic equipment. Background Art

[0002] Satellite communications can provide remote communication services in emergency situations, such as earthquakes and floods, when ground-based base station signals are lost. Using satellites as base stations, terminals can achieve long-distance communication from anywhere on Earth, virtually unrestricted by geographic location. Since satellite signals are circularly polarized, using linearly polarized terminal antennas inevitably results in approximately 3dB of polarization loss. Therefore, existing electronic equipment typically uses circularly polarized terminal antennas to minimize this loss.

[0003] However, in actual applications, it is found that the existing circularly polarized antenna structure is not only complex in structure, but also occupies a large space in the thickness direction. When it is integrated into an electronic device, it will occupy a large space. Summary of the Invention

[0004] One aspect of an embodiment of the present disclosure provides an antenna structure, including: a first metal surface, a first side of the first metal surface having a first metal strip extending in a first length direction; a second metal surface, the second metal surface is located on the lower side of the first metal surface and the projections of the second metal surface and the first metal surface in the thickness direction of the antenna structure at least partially overlap, the second metal surface and the first metal surface have a first gap, the second metal surface has a second metal strip extending in a second length direction relative to the second side of the first side, and the second length direction is opposite to the first length direction; a first connecting member connecting the third side of the first metal surface and the fourth side of the second metal surface; a feeding point, located on the first metal surface or the second metal surface.

[0005] According to the antenna structure provided by an embodiment of the present disclosure, the first connecting member includes multiple first connecting members, and the multiple first connecting members are respectively connected between the third side of the first metal surface and the fourth side of the second metal surface, and the height of the first gap is between 2mm and 4mm.

[0006] According to the antenna structure provided by an embodiment of the present disclosure, the feeding point is located on the first metal surface. When the feeding point is fed with an excitation signal, a first current is generated on the first metal surface, a second current is generated on the second metal surface, a third current is generated on the connecting part, a fourth current is generated on the first metal strip, and a fifth current is generated on the second metal strip; wherein, the first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current, and the third current, the fourth current and the fifth current excite the antenna structure to generate circularly polarized waves.

[0007] According to the antenna structure provided by the embodiment of the present disclosure, the lengths of the first side, the second side, the third side and the fourth side are the same, the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are the same, and the length of the first metal strip is the same as the length of the second metal strip; wherein the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are between 1 / 8 and 1 / 4 wavelength of the first working frequency band of the antenna structure, the lengths of the first side, the second side, the third side and the fourth side are close to 1 / 2 wavelength of the second working frequency band of the antenna structure, and the first working frequency band is lower than the second working frequency band.

[0008] The antenna structure provided according to an embodiment of the present disclosure further includes: a third metal surface, the third metal surface being located on one side of the third side of the first metal surface, the third metal surface being flush with or higher than the first metal surface in the thickness direction of the antenna structure, the fifth side of the third metal surface having a third metal strip extending in the first length direction, the length of the fifth side and the sixth side of the third metal surface being the same as the length of the third side, the length of the third metal strip being equal to or greater than the length of the first metal strip; a fourth metal surface being located below the third metal surface and the fourth metal surface The projection of the third metal surface in the thickness direction of the antenna structure at least partially overlaps, the fourth metal surface has a second gap with the third metal surface, the fourth metal surface is flush with the second metal surface in the thickness direction of the antenna structure or lower than the second metal surface, the seventh side of the fourth metal surface has a fourth metal strip extending in the second length direction, the length of the seventh side and the eighth side of the fourth metal surface is the same as the length of the fourth side, and the length of the fourth metal strip is equal to or greater than the length of the second metal strip; a second connecting member connects the sixth side of the third metal surface and the eighth side of the fourth metal surface.

[0009] According to the antenna structure provided by an embodiment of the present disclosure, the length of the third metal strip is 2 mm to 4 mm greater than the length of the first metal strip, and the length of the fourth metal strip is 2 mm to 4 mm greater than the length of the second metal strip; the second connecting member includes a plurality of second connecting members, and the plurality of second connecting members are respectively connected between the sixth side edge of the third metal surface and the eighth side edge of the fourth metal surface.

[0010] An embodiment of the present disclosure also provides an electronic device, comprising: a middle frame; a back cover, wherein the back cover and the middle frame form a cavity of the electronic device; a first metal surface, wherein the first metal surface is located on the outer surface of the back cover, and the first side of the first metal surface has a first metal strip extending in a first length direction; a second metal surface, wherein the second metal surface is located on the inner surface of the back cover, and the projections of the second metal surface and the first metal surface in the thickness direction of the electronic device at least partially overlap, and the second metal surface and the first metal surface have a first gap filled by the back cover, and the second metal surface has a second metal strip extending in a second length direction relative to the second side of the first side, and the second length direction is opposite to the first length direction; a first connecting member, which passes through the back cover and connects the third side of the first metal surface and the fourth side of the second metal surface; a feeding point, which is located on the first metal surface or the second metal surface.

[0011] According to an electronic device provided by an embodiment of the present disclosure, the first connecting member includes multiple first connecting members, and the multiple first connecting members are respectively connected between the third side of the first metal surface and the fourth side of the second metal surface, and the height of the first gap is between 2mm and 4mm.

[0012] According to an electronic device provided by an embodiment of the present disclosure, the feeding point is located on the first metal surface. When an excitation signal is fed into the feeding point, a first current is generated on the first metal surface, a second current is generated on the second metal surface, a third current is generated on the connecting member, a fourth current is generated on the first metal strip, and a fifth current is generated on the second metal strip; wherein the first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current, and the third current, the fourth current and the fifth current excite the electronic device to generate a circularly polarized wave.

[0013] According to an electronic device provided by an embodiment of the present disclosure, the lengths of the first side, the second side, the third side and the fourth side are the same, the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are the same, and the length of the first metal strip is the same as the length of the second metal strip; wherein the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are between 1 / 8 and 1 / 4 wavelength of the first operating frequency band of the antenna structure, the lengths of the first side, the second side, the third side and the fourth side are close to 1 / 2 wavelength of the second operating frequency band of the antenna structure, and the first operating frequency band is lower than the second operating frequency band.

[0014] The electronic device provided according to an embodiment of the present disclosure further includes: a third metal surface, the third metal surface being located on one side of the third side of the first metal surface, the third metal surface being flush with or higher than the first metal surface in the thickness direction of the antenna structure, the fifth side of the third metal surface having a third metal strip extending in the first length direction, the length of the fifth side and the sixth side of the third metal surface being the same as the length of the third side, the length of the third metal strip being equal to or greater than the length of the first metal strip; and a fourth metal surface being located below the third metal surface and the fourth metal surface The projection of the third metal surface in the thickness direction of the antenna structure at least partially overlaps, the fourth metal surface has a second gap with the third metal surface, the fourth metal surface is flush with the second metal surface in the thickness direction of the antenna structure or lower than the second metal surface, the seventh side of the fourth metal surface has a fourth metal strip extending in the second length direction, the length of the seventh side and the eighth side of the fourth metal surface is the same as the length of the fourth side, and the length of the fourth metal strip is equal to or greater than the length of the second metal strip; a second connecting member connects the sixth side of the third metal surface and the eighth side of the fourth metal surface.

[0015] According to an electronic device provided by an embodiment of the present disclosure, the length of the third metal strip is 2 mm to 4 mm greater than the length of the first metal strip, and the length of the fourth metal strip is 2 mm to 4 mm greater than the length of the second metal strip; the second connecting member includes a plurality of second connecting members, and the plurality of second connecting members are respectively connected between the sixth side edge of the third metal surface and the eighth side edge of the fourth metal surface.

[0016] Additional aspects and advantages of the embodiments of the present disclosure will be given in part in the description below and in part will become apparent from the description below or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present disclosure or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is one of the schematic diagrams of the antenna structure provided in the embodiment of the present disclosure.

[0019] Figure 2 This is the second schematic diagram of the antenna structure provided in the embodiment of the present disclosure.

[0020] Figure 3 This is the third schematic diagram of the antenna structure provided in the embodiment of the present disclosure.

[0021] Figure 4 This is the fourth schematic diagram of the antenna structure provided in an embodiment of the present disclosure.

[0022] Figure 5 3 is a schematic diagram of current distribution of the antenna structure provided by an embodiment of the present disclosure at the first operating frequency f1.

[0023] Figure 6 3 is a schematic diagram of current distribution of the antenna structure provided by an embodiment of the present disclosure at the second operating frequency f2.

[0024] Figure 7 It is the S11 curve of the antenna structure provided by the embodiment of the present disclosure.

[0025] Figure 8 is the efficiency curve of the antenna structure provided by the embodiment of the present disclosure.

[0026] Figure 9 Schematic diagram of the axial ratio of the antenna structure provided by the embodiment of the present disclosure.

[0027] Figure 10 is a schematic diagram of an electronic device provided by an embodiment of the present disclosure.

[0028] Figure 11 It is the total antenna pattern of the electronic device provided by the embodiment of the present disclosure at the first target frequency f1.

[0029] Figure 12 is a directional pattern of a RHCP (right-hand circular polarization) component of the electronic device provided by an embodiment of the present disclosure at the first target frequency f1.

[0030] Figure 13 It is the total antenna pattern of the electronic device provided by the embodiment of the present disclosure at the second target frequency f2.

[0031] Figure 14 is a directional pattern of the RHCP component of the electronic device provided by an embodiment of the present disclosure at the second target frequency f2.

[0032] Reference numerals: 100, first radiator; 110, first metal surface; 120, second metal surface; 130, first connecting piece; 140, feeding point; 150, first metal strip; 160, second metal strip; 170, first gap; 200, second branch; 210, third metal surface; 220, fourth metal surface; 230, second connecting piece; 240, third metal strip; 250, fourth metal strip; 260, second gap; 300, middle frame; 400, back cover. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of this disclosure more clear, the technical solutions of this disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this disclosure, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of this disclosure without creative effort shall fall within the scope of protection of this disclosure.

[0034] In the description of the embodiments of the present disclosure, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0036] In the embodiments of the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the presently disclosed embodiments. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory. The following is a combination of Figures 1 to 14 The antenna structure and electronic device provided by the embodiments of the present disclosure are described.

[0038] It should be noted that the following “first side”, “second side”… “eighth side” can be specifically referred to Figure 3 As shown in, for example, the “first side” corresponds to Figure 3 The side indicated by "①" in the figure corresponds to the side indicated by "second side". Figure 3 The side indicated by “②” in the figure, …, the “eighth side” corresponds to Figure 3 The "⑧" shown in the figure refers to the side. Similarly, the following "first top side", "first bottom side", "second top side" and "second bottom side" can be specifically referred to. Figure 3 As shown in .

[0039] It's understandable that when an electromagnetic wave propagates through space, the direction of its electric field changes in a certain direction, and this change is the polarization of the electromagnetic wave. In other words, the oscillation plane of the electric field defines the polarization direction of the electromagnetic wave. Based on how the electric field changes, the polarization of plane electromagnetic waves can be divided into three types: linear polarization, circular polarization, and elliptical polarization. When the endpoints of the electric field vector periodically trace a circular or elliptical trajectory in space, and when observed along the direction of electromagnetic wave propagation, the trajectory follows a right-handed spiral or rotates clockwise over time, this is called right-hand circular polarization. If the trajectory follows a left-handed spiral or rotates counterclockwise over time, this is called left-hand circular polarization.

[0040] Circularly polarized waves are commonly used in satellite communication systems because they are less susceptible to multipath effects and polarization distortion (for example, linearly polarized waves undergo polarization rotation (commonly known as "Faraday rotation") when passing through the ionosphere) and do not require strict positioning of the receiving antenna. This means that satellite antennas using circularly polarized waves can maintain high gain within a certain angular range, which is particularly important for electronic equipment with satellite communication and navigation functions, as they may need to receive signals in constantly changing directions.

[0041] A circularly polarized wave can be decomposed into two linearly polarized waves with a 90° phase difference, equal amplitude, and spatially orthogonal orientation. Similarly, two linearly polarized waves with a 90° phase difference, equal amplitude, and spatially orthogonal orientation can also be synthesized into a circularly polarized wave. This property allows electronic devices, especially mobile devices, to maximize the synthesis of circularly polarized waves within the limited design space, thereby improving the ability to transmit and receive satellite signals.

[0042] Under circular polarization, the endpoints of the electric field vector periodically trace out an ellipse in space. The ratio of the major axis to the minor axis of the ellipse is called the axial ratio. The axial ratio is a key performance metric for circularly polarized antennas. It represents the purity of circular polarization and is a key indicator of the signal gain differences of electronic devices in different directions. The closer the antenna's circular polarization axial ratio is to 1 (the endpoints of the electric field vector periodically trace out a circular path in space), the better its circular polarization performance.

[0043] See also Figure 1 , which shows the antenna structure provided by an embodiment of the present disclosure, including: a first metal surface 110, a second metal surface 120, a first connecting member 130 and a feed point 140.

[0044] The first side of the first metal surface 110 has a first length direction ( Figure 2 The second metal surface 120 is located on the lower side of the first metal surface 110 and the second metal surface 120 and the first metal surface 110 are in the thickness direction of the antenna structure ( Figure 2 The projections in the Z direction or -Z direction shown in FIG are at least partially overlapped, the second metal surface 120 and the first metal surface 110 have a first gap 170, and the second metal surface 120 has a second side relative to the first side in the second length direction ( Figure 2 The second metal strip 160 extends in the X direction (as shown in the figure), and the second length direction is opposite to the first length direction; the first connecting member 130 is used to connect the third side of the first metal surface 110 and the fourth side of the second metal surface 120; the feeding point 140 is located on the first metal surface 110 or the second metal surface 120.

[0045] The antenna structure provided by the present disclosure can generate circularly polarized waves when the feed point 140 is fed with an excitation signal, thereby significantly reducing polarization loss. In addition, the antenna structure provided by the present disclosure is simple in structure. By adjusting the first gap, the antenna structure occupies a smaller space in the thickness direction, and is suitable for integration into various electronic devices.

[0046] Specifically, when the feed point 140 is fed with an excitation signal, currents can be generated on the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160 and the first connecting member 130, respectively. The currents generated on the first metal surface 110 and the second metal surface 120 are equal in amplitude and opposite in direction, and the electromagnetic waves generated by the two can at least partially offset each other. The currents generated on the first metal strip 150 and the second metal strip 160 are perpendicular to the current generated on the first connecting member 130 (with a phase difference of 90°). The currents generated on the first metal strip 150 and the second metal strip 160 and the current generated on the first connecting member 130 can excite the antenna structure to generate circularly polarized waves, so that the antenna structure can significantly reduce polarization losses. The first metal surface 110 and the second metal surface 120 are both plate-like structures, the first metal strip 150 and the second metal strip 160 are both slender metal strip structures, and the first connecting member 130 is used to electrically connect the third side of the first metal surface 110 and the fourth side of the second metal surface 120. Therefore, the antenna structure provided by the present invention can, under the premise of satisfying circular polarization, occupy a smaller space in the thickness direction by adjusting the first gap, and is suitable for integration into various electronic devices.

[0047] The antenna structure provided by the present disclosure includes a first metal surface 110 , a second metal surface 120 , a first connector 130 and a feed point 140 .

[0048] A first gap 170 is provided between the first metal surface 110 and the second metal surface 120 in the thickness direction of the antenna structure. The first gap 170 is used to separate the first metal surface 110 and the second metal surface 120 so that when the feed point 140 is fed with an excitation signal, the currents on the second metal surface 120 and the first metal surface 110 can flow in a set direction. The projections of the second metal surface 120 and the first metal surface 110 in the thickness direction of the antenna structure at least partially overlap. In the case of partial overlap, when the feed point 140 is fed with an excitation signal, the electromagnetic waves generated by the currents generated on the first metal surface 110 and the second metal surface 120 can partially cancel each other out. In the case of complete overlap, when the feed point 140 is fed with an excitation signal, the electromagnetic waves generated by the currents generated on the first metal surface 110 and the second metal surface 120 can completely cancel each other out.

[0049] See also Figure 1 、 Figure 5 and Figure 6As shown, as an example, the feed point 140 is located on the first metal surface 110. When the feed point 140 is fed with an excitation signal, a first current is generated on the first metal surface 110, a second current is generated on the second metal surface 120, a third current is generated on the connector, a fourth current is generated on the first metal strip 150, and a fifth current is generated on the second metal strip 160; wherein the first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current (the phase difference is 90°), and the third current, the fourth current and the fifth current excite the antenna structure to generate circularly polarized waves.

[0050] In some embodiments, since the first metal strip 150 is arranged on the first side of the first metal surface 110 and the second metal strip 160 is arranged on the second side of the second metal surface 120, during processing, the first metal surface 110 and the first metal strip 150 can be set as one piece, and the second metal surface 120 and the second metal strip 160 can be set as one piece, and the third side of the first metal surface 110 and the fourth side of the second metal surface 120 can be electrically connected through the first connecting member 130 to form an antenna structure.

[0051] In some embodiments, the first connector 130 , the third side of the first metal surface 110 , and the fourth side of the second metal surface 120 may be integrally formed, that is, the entire antenna structure is formed by cutting a metal plate into a set shape and then bending it.

[0052] Of course, in some embodiments, the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160, and the first connector 130 can also be provided separately, and the components can be configured to be electrically connected according to a predetermined method. For example, the first metal strip 150 is welded to the first side of the first metal surface 110, the second metal strip 160 is welded to the second side of the second metal surface 120, the upper end of the first connector 130 is welded to the third side of the first metal surface 110, and the lower end of the first connector 130 is welded to the fourth side of the second metal surface 120.

[0053] That is, the antenna structure provided in the present disclosure can select the connection method of the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160 and the first connector 130 according to the type of adapted electronic equipment, and there is no specific limitation on this.

[0054] The feed point 140 is used to connect to the circuit board of the electronic device so that an excitation signal can be fed through the feed point 140. The feed point 140 can be provided on the first metal surface 110 or the second metal surface 120 in various ways, such as direct welding or snap-on connection. As an example, in this embodiment, the feed point 140 is provided on the first metal surface 110, and the first metal surface 110 has a slot, into which the feed point 140 is snapped.

[0055] In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12- to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by dielectric or insulating layers such as fiberglass, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a routing layer, and the routing layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system-on-chip (SoC) structure, etc. can be mounted on or connected to the circuit board; or electrically connected to the routing layer and / or ground layer in the circuit board. For example, the RF source (RF chip) in the feed point structure is disposed on the routing layer.

[0056] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of a conductive material. In one embodiment, the conductive material can be any of the following: copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will appreciate that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0057] See also Figure 1 As shown, according to some embodiments of the present disclosure, the first connecting member 130 includes multiple first connecting members 130, and the multiple first connecting members 130 are respectively connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120, and the height of the first gap 170 is between 2mm and 4mm.

[0058] By disposing multiple first connectors 130 between the third side of the first metal surface 110 and the fourth side of the second metal surface 120, when the feed point 140 is fed with an excitation signal, currents perpendicular to the currents in the first metal strip 150 and the second metal strip 160 are simultaneously distributed in the multiple first connectors 130, thereby optimizing the distribution of electromagnetic waves. The height of the first gap 170 is between 2 mm and 4 mm (or a smaller or larger range), which can keep the overall thickness of the antenna structure within a reasonable range while ensuring that the antenna structure generates circularly polarized waves when the feed point 140 is fed with an excitation signal, thereby reducing the space occupied by the antenna structure in the thickness direction. At the same time, the first gap 170 can be used to accommodate a portion of the back cover 400 of the electronic device. In other examples, the first gap 170 can be used to accommodate a portion of the upper or lower front frame of the electronic device, such as the upper front frame of a non-full-screen mobile phone.

[0059] It should be noted that the multiple first connectors 130 can be connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120 in a uniform arrangement, for example, with the same spacing between adjacent first connectors 130. Accordingly, the multiple first connectors 130 can also be connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120 in a non-uniform arrangement, for example, with different spacing between at least some adjacent first connectors 130, to meet the spatial layout requirements of the antenna structure in the electronic device.

[0060] The height of the first gap 170 is between 2 mm and 4 mm, and may be 2 mm, 3 mm, or 4 mm, etc. Alternatively, the first gap 170 may have other heights less than 2 mm or greater than 4 mm.

[0061] As an example, the first connecting member 130 in this embodiment is a cylindrical metal column structure, and a plurality of fixing holes are evenly spaced on the third side of the first metal surface 110 and the fourth side of the second metal surface 120. The upper end of the first connecting member 130 is clamped in the fixing holes on the third side of the first metal surface 110, and the lower end of the first connecting member 130 is clamped in the fixing holes on the fourth side of the second metal surface 120. The upper end of the first connecting member 130 is flush with the outer surface of the first metal surface 110, and the lower end of the first connecting member 130 is flush with the outer surface of the second metal surface 120.

[0062] Of course, in some embodiments, the first connecting member 130 may also be a triangular prism or a quadrangular prism structure, which is not specifically limited.

[0063] See also Figures 1 to 4As shown, according to some embodiments of the present disclosure, the lengths of the first side, the second side, the third side, and the fourth side are the same, the lengths of the first top side of the first metal surface 110, the first bottom side of the first metal surface 110, the second top side of the second metal surface 120, and the second bottom side of the second metal surface 120 are the same, and the lengths of the first metal strip 150 and the second metal strip 160 are the same; wherein the lengths of the first top side of the first metal surface 110, the first bottom side of the first metal surface 110, the second top side of the second metal surface 120, and the second bottom side of the second metal surface 120 are between 1 / 8 and 1 / 4 wavelength (including the end values) of the first working frequency band f1 of the antenna structure, and the lengths of the first side, the second side, the third side, and the fourth side are close to or equal to 1 / 2 wavelength of the second working frequency band f2 of the antenna structure, and the first working frequency band f1 is lower than the second working frequency band f2. The first working frequency band f1 is the Beidou satellite communication receiving frequency band (2.483GHz~2.5GHz), for example, including the present disclosure Figure 7-9 The range shown by point 1-point 2 shown in the figure; the second operating frequency band f2 is the 5G n77 frequency band (3.3GHz-4.2GHz), for example, the present disclosure Figure 7-9 Point 3 (3.8 GHz) is shown as a feasible second operating frequency band f2.

[0064] It should be noted that the above-mentioned "the lengths of the first side, the second side, the third side and the fourth side are close to 1 / 2 wavelength of the second working frequency band f2 of the antenna structure" specifically refers to the lengths of the first side, the second side, the third side and the fourth side being 0.8 to 1.2 times the 1 / 2 wavelength of the second working frequency band f2 of the antenna structure.

[0065] By setting the dimensions of the sides of the first metal surface 110 and the second metal surface 120 in the above manner, the frequency response and radiation characteristics of the antenna structure can be effectively optimized, so that the antenna structure can meet dual-band usage.

[0066] Specifically, the design of the side lengths of the first metal surface 110 and the second metal surface 120 ensures that the antenna's performance in the first operating frequency band f1 and the second operating frequency band f2 is more in line with the requirements. First, the lengths of the top and bottom sides of the first metal surface 110 and the second metal surface 120 are between 1 / 8 and 1 / 4 of the wavelength of the first operating frequency band f1, ensuring good resonance and radiation efficiency of the antenna at low frequencies. The lengths of the first, second, third, and fourth side edges are close to 1 / 2 of the wavelength of the second operating frequency band f2, enabling effective radiation at higher frequencies and improving the antenna's bandwidth and gain.

[0067] The first side of the first metal surface 110, the second side of the second metal surface 120, the third side of the first metal surface 110, and the fourth side of the second metal surface 120 can all be referred to as Figure 4As shown in L11; the first top edge of the first metal surface 110, the first bottom edge of the first metal surface 110, the second top edge of the second metal surface 120 and the second bottom edge of the second metal surface 120 can all be seen Figure 4 As shown in L12.

[0068] See also Figure 2 and Figure 3 As shown, according to some embodiments of the present disclosure, the antenna structure further includes: a third metal surface 210 , a fourth metal surface 220 and a second connector 230 .

[0069] The third metal surface 210 is located on one side of the third side of the first metal surface 110. The third metal surface 210 is flush with or higher than the first metal surface 110 in the thickness direction of the antenna structure. The fifth side of the third metal surface 210 has a third metal strip 240 extending in the first length direction. The length of the fifth side and the sixth side of the third metal surface 210 is the same as the length of the third side. The length of the third metal strip 240 is equal to or greater than the length of the first metal strip 150. The fourth metal surface 220 is located on the lower side of the third metal surface 210 and the fourth metal surface 220 and the third metal surface 210 are aligned with each other in the thickness direction of the antenna structure. The projections in the thickness direction at least partially overlap, the fourth metal surface 220 and the third metal surface 210 have a second gap 260, the fourth metal surface 220 and the second metal surface 120 are flush with or lower than the second metal surface 120 in the thickness direction of the antenna structure, the seventh side of the fourth metal surface 220 has a fourth metal strip 250 extending in the second length direction, the length of the seventh side and the eighth side of the fourth metal surface 220 is the same as the length of the fourth side, and the length of the fourth metal strip 250 is equal to or greater than the length of the second metal strip 160; the sixth side of the third metal surface 210 and the eighth side of the fourth metal surface 220 are connected.

[0070] By setting a third metal surface 210, a fourth metal surface 220 and a second connecting member 230, the above structure can be used to form a second branch 200 of the antenna structure. At this time, the first metal surface 110, the second metal surface 120, the first connecting member 130 and the feed point 140 form the first radiator 100 of the antenna structure. The second branch 200 can adjust the radiation direction of the first radiator 100 so that the antenna structure can have an end-fire characteristic.

[0071] The lengths of the fifth, sixth, seventh and eighth sides can be found in Figure 4 As shown in L21, L21=L11 is satisfied; the length of the first metal strip 150 can be seen in Figure 4 As shown in L13, the length of the second metal strip 160 can be seen in Figure 4 As shown in L14, the length of the third metal strip 240 is shown in FIG. Figure 4 As shown in L23, the length of the fourth metal strip 250 can be seen in Figure 4 As shown in L24, L23≥L13 and L24≥L14 are satisfied.

[0072] In some embodiments, the distance between the second branch 200 of the antenna structure and the first radiator 100 of the antenna structure is 2 mm to 4 mm ( Figure 4 D in the middle), which can optimize the directivity of the antenna structure. When the excitation signal is fed into the feed point 140, the electromagnetic wave can be directed in the -Y direction ( Figure 2 ) radiation, thereby optimizing the end-fire characteristics of the antenna structure.

[0073] See also Figure 2 and Figure 4 As shown, according to some embodiments of the present disclosure, the length of the third metal strip 240 is 2 mm to 4 mm greater than the length of the first metal strip 150, and the length of the fourth metal strip 250 is 2 mm to 4 mm greater than the length of the second metal strip 160; the second connecting member 230 includes a plurality of second connecting members 230, and the plurality of second connecting members 230 are respectively connected between the sixth side of the third metal surface 210 and the eighth side of the fourth metal surface 220.

[0074] By setting the length of the third metal strip 240 to be 2 mm to 4 mm greater than the length of the first metal strip 150, and setting the length of the fourth metal strip 250 to be 2 mm to 4 mm greater than the length of the second metal strip 160, the electromagnetic waves induced by the first radiator 100 and the second branch 200 in the antenna structure can be superimposed on each other and have the same phase in the -Y direction, and in the +Y direction ( Figure 2 ), the phases are opposite and cancel each other out, thereby further optimizing the end-fire characteristics of the antenna structure.

[0075] The length of the third metal strip 240 is 2 mm, 3 mm, or 4 mm longer than the length of the first metal strip 150 , and the length of the fourth metal strip 250 is 2 mm, 3 mm, or 4 mm longer than the length of the second metal strip 160 .

[0076] It should be noted that, for the specific implementation of the third metal surface 210, the fourth metal surface 220, the third metal strip 240, the fourth metal strip 250 and the second connecting member 230 in the second branch 200 of the antenna structure, reference can be made to the above description of the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160 and the first connecting member 130 in the first radiator 100 of the antenna structure, and no further details will be given.

[0077] See also Figure 7 and Figure 8 As shown, they are respectively the S11 curve and the efficiency curve of the antenna structure provided by the embodiment of the present disclosure, Figure 7 and Figure 8As shown in the figure, the antenna structure provided by the present disclosure can cover the entire Beidou satellite navigation system S band (2483.5 to 2500) MHz, as well as the 5G cellular n77 band, thus achieving dual-band characteristics.

[0078] It should be noted that S11 represents the reflection coefficient, a parameter that characterizes the antenna's transmission efficiency. The S11 parameter is typically a negative number. A smaller S11 parameter indicates lower antenna return loss and less energy reflected from the antenna itself, meaning more energy actually enters the antenna and higher system efficiency. A larger S11 parameter indicates greater antenna return loss and lower system efficiency. It should be noted that an S11 value of -6dB is generally used as a standard in engineering. When an antenna's S11 value is less than -6dB, it can be considered to be functioning properly or having good transmission efficiency.

[0079] See also Figure 9 , which is a schematic diagram of the axial ratio of the antenna structure provided by an embodiment of the present disclosure, Figure 9 As shown in the figure, the circular polarization characteristics of the antenna structure provided by the present invention have broadband characteristics in the first working frequency band f1, and the bandwidth with an axial ratio of less than 3dB can fully cover the S band (2483.5 to 2500) MHz of the Beidou satellite navigation system, and also have certain circular polarization characteristics in the second working frequency band f2.

[0080] It should be noted that the above-mentioned "axial ratio" is usually used to evaluate the polarization performance of an antenna in a specific direction. In particular, when receiving and transmitting signals, an antenna with an axial ratio close to 1 can provide the best circular polarization effect.

[0081] The electronic device provided by the present disclosure is described below. The electronic device described below and the antenna structure described above can refer to each other.

[0082] It should be noted that the electronic device can be any type of device having the above antenna structure, such as a smart phone, a tablet computer, a wireless communication device, an Internet of Things device, a wireless network device, a smart wearable device, etc. Figure 10 As shown, in the embodiment of the present disclosure, the electronic device takes a mobile phone as an example.

[0083] See also Figure 10 As shown, the electronic device provided by the embodiment of the present disclosure includes: a middle frame 300 , a back cover 400 , a first metal surface 110 , a second metal surface 120 , a first connector 130 and a feed point 140 .

[0084] The back cover 400 and the middle frame 300 form a cavity of the electronic device; the first metal surface 110 is located on the outer surface of the back cover 400, and the first side of the first metal surface 110 has a first metal strip 150 extending in the first length direction; the second metal surface 120 is located on the inner surface of the back cover 400, and the projections of the second metal surface 120 and the first metal surface 110 in the thickness direction of the electronic device at least partially overlap, and the second metal surface 120 and the first metal surface 110 have a first gap 170 filled by the back cover 400, and the second metal surface 120 has a second metal strip 160 extending in the second length direction on the second side relative to the first side, and the second length direction is opposite to the first length direction; the first connecting member 130 passes through the back cover 400 to connect the third side of the first metal surface 110 and the fourth side of the second metal surface 120; the feeding point 140 is located on the first metal surface 110 or the second metal surface 120.

[0085] The electronic device provided by the present disclosure, due to the use of the above-mentioned antenna structure, can generate circularly polarized waves when an excitation signal is fed to the feed point 140, significantly reducing polarization loss. The first metal surface 110 and the second metal surface 120 are respectively provided on the outer and inner surfaces of the back cover 400, and the first gap 170 can be used to accommodate the back cover 400. This can reduce the space occupied by the antenna structure in the thickness direction of the electronic device, while achieving circular polarization and making the electronic device structure more compact.

[0086] Specifically, when the feed point 140 is fed with an excitation signal, currents can be generated on the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160 and the first connecting member 130, respectively. The currents generated on the first metal surface 110 and the second metal surface 120 are equal in amplitude and opposite in direction, and the electromagnetic waves generated by the two can at least partially offset each other. The currents generated on the first metal strip 150 and the second metal strip 160 are perpendicular to the current generated on the first connecting member 130 (with a phase difference of 90°). The currents generated on the first metal strip 150 and the second metal strip 160 and the current generated on the first connecting member 130 can excite the antenna structure to generate circularly polarized waves, so that the antenna structure can significantly reduce polarization losses. The first metal surface 110 and the second metal surface 120 are both plate-like structures, the first metal strip 150 and the second metal strip 160 are both slender metal strip structures, and the first connecting member 130 is used to electrically connect the third side of the first metal surface 110 and the fourth side of the second metal surface 120. Therefore, the antenna structure provided by the present invention can, under the premise of satisfying circular polarization, occupy a very small space in the thickness direction by adjusting the first gap, and is suitable for integration into various electronic devices.

[0087] The antenna structure provided by the present disclosure includes a first metal surface 110 , a second metal surface 120 , a first connector 130 and a feed point 140 .

[0088] A first gap 170 is provided between the first metal surface 110 and the second metal surface 120 in the thickness direction of the antenna structure. The first gap 170 is used to separate the first metal surface 110 and the second metal surface 120 so that when the feed point 140 is fed with an excitation signal, the currents on the second metal surface 120 and the first metal surface 110 can flow in a set direction. The projections of the second metal surface 120 and the first metal surface 110 in the thickness direction of the antenna structure at least partially overlap. In the case of partial overlap, when the feed point 140 is fed with an excitation signal, the electromagnetic waves generated by the currents generated on the first metal surface 110 and the second metal surface 120 can partially cancel each other out. In the case of complete overlap, when the feed point 140 is fed with an excitation signal, the electromagnetic waves generated by the currents generated on the first metal surface 110 and the second metal surface 120 can completely cancel each other out.

[0089] See also Figure 1 、 Figure 5 、 Figure 6 and Figure 10 As shown, as an example, the feed point 140 is located on the first metal surface 110. When the feed point 140 is fed with an excitation signal, a first current is generated on the first metal surface 110, a second current is generated on the second metal surface 120, a third current is generated on the connector, a fourth current is generated on the first metal strip 150, and a fifth current is generated on the second metal strip 160; wherein the first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current (the phase difference is 90°), and the third current, the fourth current and the fifth current excite the antenna structure to generate circularly polarized waves.

[0090] The feed point 140 is used to connect to the circuit board of the electronic device so that an excitation signal can be fed through the feed point 140. The feed point 140 can be provided on the first metal surface 110 or the second metal surface 120 in various ways, such as direct welding or snap-on connection. As an example, in this embodiment, the feed point 140 is provided on the first metal surface 110, and the first metal surface 110 has a slot, into which the feed point 140 is snapped.

[0091] In one embodiment, the circuit board can be a printed circuit board (PCB), such as an 8-layer, 10-layer, or 12- to 14-layer board having 8, 10, 12, 13, or 14 layers of conductive material, or an element separated and electrically insulated by dielectric or insulating layers such as fiberglass, polymer, etc. In one embodiment, the circuit board includes a dielectric substrate, a ground layer, and a routing layer, and the routing layer and the ground layer are electrically connected through vias. In one embodiment, components such as a display, a touch screen, input buttons, a transmitter, a processor, a memory, a battery, a charging circuit, a system-on-chip (SoC) structure, etc. can be mounted on or connected to the circuit board; or electrically connected to the routing layer and / or ground layer in the circuit board. For example, the RF source (RF chip) in the feed point structure is disposed on the routing layer.

[0092] Any of the above-mentioned grounding layers, grounding plates, or grounding metal layers are made of a conductive material. In one embodiment, the conductive material can be any of the following: copper, aluminum, stainless steel, brass, and alloys thereof, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil and tin-plated copper on an insulating substrate, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will appreciate that the grounding layer / grounding plate / grounding metal layer can also be made of other conductive materials.

[0093] In some embodiments, the back cover 400 can be directly positioned within the first gap 170 by snap-fitting, or further secured by bonding. For example, the inner surface of the first metal surface 110 can be bonded to the outer wall of the back cover 400, and the inner surface of the second metal surface 120 can be bonded to the inner wall of the back cover 400. Similarly, the first metal strip 150 and the second metal strip 160 can also be secured to the outer wall and inner wall of the back cover 400, respectively, by snap-fitting or bonding.

[0094] To further reduce the space occupied by the antenna structure in the thickness direction of the electronic device, in some embodiments, a receiving groove compatible with the structure of the first metal surface 110, the first metal strip 150, the second metal surface 120, and the second metal strip 160 can be provided on the outer wall and / or inner wall of the back cover 400. The depth of the receiving groove is preferably the same as the thickness of the first metal surface 110, the first metal strip 150, the second metal surface 120, and the second metal strip 160. At the same time, a pre-set clearance structure (such as a clearance through-hole or a clearance groove, etc.) can be provided at the position corresponding to the first connector 130 on the back cover 400.

[0095] See also Figure 10As shown, according to some embodiments of the present disclosure, the first connecting member 130 includes multiple first connecting members 130, and the multiple first connecting members 130 are respectively connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120, and the height of the first gap 170 is between 2mm and 4mm.

[0096] By disposing multiple first connectors 130 between the third side of the first metal surface 110 and the fourth side of the second metal surface 120, when the feed point 140 is fed with an excitation signal, currents perpendicular to the currents in the first metal strip 150 and the second metal strip 160 are simultaneously distributed in the multiple first connectors 130, thereby optimizing the distribution of electromagnetic waves. The height of the first gap 170 is between 2 mm and 4 mm (or a smaller or larger range), which can keep the overall thickness of the antenna structure within a reasonable range while ensuring that the antenna structure generates circularly polarized waves when the feed point 140 is fed with an excitation signal, thereby reducing the space occupied by the antenna structure in the thickness direction. At the same time, the first gap 170 can be used to accommodate a portion of the back cover 400. In other examples, the first gap 170 can be used to accommodate a portion of the upper or lower frame of the front of an electronic device, such as a portion of the upper frame of a non-full-screen mobile phone.

[0097] It should be noted that the multiple first connectors 130 can be connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120 in a uniform arrangement, for example, with the same spacing between adjacent first connectors 130. Accordingly, the multiple first connectors 130 can also be connected between the third side of the first metal surface 110 and the fourth side of the second metal surface 120 in a non-uniform arrangement, for example, with different spacing between at least some adjacent first connectors 130, to meet the spatial layout requirements of the antenna structure in the electronic device.

[0098] The height of the first gap 170 is between 2 mm and 4 mm, and may be 2 mm, 3 mm, or 4 mm, etc. Alternatively, the first gap 170 may have other heights less than 2 mm or greater than 4 mm.

[0099] As an example, the first connector 130 in this embodiment is a cylindrical metal column structure. A plurality of fixing holes are evenly spaced apart on the third and fourth sides of the first metal surface 110 and the second metal surface 120. The upper end of the first connector 130 is secured within the fixing holes on the third and fourth sides of the first metal surface 110, while the lower end of the first connector 130 is secured within the fixing holes on the fourth side of the second metal surface 120. Furthermore, the upper end of the first connector 130 is flush with the outer surface of the first metal surface 110, while the lower end of the first connector 130 is flush with the outer surface of the second metal surface 120. In this case, the back cover 400 may have multiple clearance holes at corresponding positions to allow each first connector 130 to pass through the clearance holes and to secure each first connector 130 in place using the clearance holes.

[0100] Of course, in some embodiments, the first connecting member 130 may also be a triangular prism or a quadrangular prism structure, which is not specifically limited.

[0101] See also Figures 1 to 4 as well as Figure 10 As shown, according to some embodiments of the present disclosure, the lengths of the first side, the second side, the third side and the fourth side are the same, the lengths of the first top edge of the first metal surface 110, the first bottom edge of the first metal surface 110, the second top edge of the second metal surface 120 and the second bottom edge of the second metal surface 120 are the same, and the length of the first metal strip 150 and the second metal strip 160 are the same; wherein, the lengths of the first top edge of the first metal surface 110, the first bottom edge of the first metal surface 110, the second top edge of the second metal surface 120 and the second bottom edge of the second metal surface 120 are between 1 / 8 and 1 / 4 wavelength of the first operating frequency band f1 of the antenna structure, the lengths of the first side, the second side, the third side and the fourth side are close to or equal to 1 / 2 wavelength of the second operating frequency band f2 of the antenna structure, and the first operating frequency band f1 is lower than the second operating frequency band f2.

[0102] It should be noted that the above-mentioned "the lengths of the first side, the second side, the third side and the fourth side are close to 1 / 2 wavelength of the second working frequency band f2 of the antenna structure" specifically refers to the lengths of the first side, the second side, the third side and the fourth side being 0.8 to 1.2 times the 1 / 2 wavelength of the second working frequency band f2 of the antenna structure.

[0103] By setting the dimensions of the sides of the first metal surface 110 and the second metal surface 120 in the above manner, the frequency response and radiation characteristics of the antenna structure can be effectively optimized, so that the antenna structure can meet dual-band usage.

[0104] Specifically, the design of the side lengths of the first metal surface 110 and the second metal surface 120 ensures that the antenna's performance in the first operating frequency band f1 and the second operating frequency band f2 is more in line with the requirements. First, the lengths of the top and bottom sides of the first metal surface 110 and the second metal surface 120 are between 1 / 8 and 1 / 4 of the wavelength of the first operating frequency band f1, ensuring good resonance and radiation efficiency of the antenna at low frequencies. The lengths of the first, second, third, and fourth side edges are close to 1 / 2 of the wavelength of the second operating frequency band f2, enabling effective radiation at higher frequencies and improving the antenna's bandwidth and gain.

[0105] The first side of the first metal surface 110, the second side of the second metal surface 120, the third side of the first metal surface 110, and the fourth side of the second metal surface 120 can all be referred to as Figure 4 As shown in L11; the first top edge of the first metal surface 110, the first bottom edge of the first metal surface 110, the second top edge of the second metal surface 120 and the second bottom edge of the second metal surface 120 can all be seen Figure 4 As shown in L12.

[0106] See also Figure 2 and Figure 10 As shown, according to some embodiments of the present disclosure, the electronic device further includes: a third metal surface 210 , a fourth metal surface 220 and a second connecting member 230 .

[0107] The third metal surface 210 is located on one side of the third side of the first metal surface 110. The third metal surface 210 is flush with or higher than the first metal surface 110 in the thickness direction of the antenna structure. The fifth side of the third metal surface 210 has a third metal strip 240 extending in the first length direction. The length of the fifth side and the sixth side of the third metal surface 210 is the same as the length of the third side. The length of the third metal strip 240 is equal to or greater than the length of the first metal strip 150. The fourth metal surface 220 is located on the lower side of the third metal surface 210 and the fourth metal surface 220 and the third metal surface 210 are aligned in the thickness direction of the antenna structure. The projections on the antenna structure at least partially overlap, the fourth metal surface 220 and the third metal surface 210 have a second gap 260, the fourth metal surface 220 is flush with or lower than the second metal surface 120 in the thickness direction of the antenna structure, the seventh side of the fourth metal surface 220 has a fourth metal strip 250 extending in the second length direction, the length of the seventh side and the eighth side of the fourth metal surface 220 is the same as the length of the fourth side, and the length of the fourth metal strip 250 is equal to or greater than the length of the second metal strip 160; the second connecting member 230 connects the sixth side of the third metal surface 210 and the eighth side of the fourth metal surface 220.

[0108] By setting a third metal surface 210, a fourth metal surface 220 and a second connecting member 230, the above structure can be used to form a second branch 200 of the antenna structure. At this time, the first metal surface 110, the second metal surface 120, the first connecting member 130 and the feed point 140 form the first radiator 100 of the antenna structure. The second branch 200 can adjust the radiation direction of the first radiator 100 so that the antenna structure can have an end-fire characteristic.

[0109] In the second branch 200 , the third metal surface 210 and the fourth metal surface 220 may partially overlap or completely overlap in the thickness direction of the antenna structure.

[0110] In some embodiments, the distance between the second branch 200 of the antenna structure and the first radiator 100 of the antenna structure is 2 mm to 4 mm ( Figure 4 D in the middle), which can optimize the directivity of the antenna structure. When the excitation signal is fed into the feed point 140, the electromagnetic wave can be directed in the -Y direction ( Figure 2 ) radiation, thereby optimizing the end-fire characteristics of the antenna structure.

[0111] As shown in the figure, according to some embodiments of the present disclosure, the length of the third metal strip 240 is 2 mm to 4 mm greater than the length of the first metal strip 150, and the length of the fourth metal strip 250 is 2 mm to 4 mm greater than the length of the second metal strip 160; the second connecting member 230 includes a plurality of second connecting members 230, and the plurality of second connecting members 230 are respectively connected between the sixth side of the third metal surface 210 and the eighth side of the fourth metal surface 220.

[0112] By setting the length of the third metal strip 240 to be 2 mm to 4 mm greater than the length of the first metal strip 150, and setting the length of the fourth metal strip 250 to be 2 mm to 4 mm greater than the length of the second metal strip 160, the electromagnetic waves induced by the first radiator 100 and the second branch 200 in the antenna structure can be superimposed on each other and have the same phase in the -Y direction, and in the +Y direction ( Figure 10 ), the phases are opposite and cancel each other out, thereby further optimizing the end-fire characteristics of the antenna structure.

[0113] The length of the third metal strip 240 is 2 mm, 3 mm, or 4 mm longer than the length of the first metal strip 150 , and the length of the fourth metal strip 250 is 2 mm, 3 mm, or 4 mm longer than the length of the second metal strip 160 .

[0114] It should be noted that, for the specific implementation of the third metal surface 210, the fourth metal surface 220, the third metal strip 240, the fourth metal strip 250 and the second connecting member 230 in the second branch 200 of the antenna structure, reference can be made to the above description of the first metal surface 110, the second metal surface 120, the first metal strip 150, the second metal strip 160 and the first connecting member 130 in the first radiator 100 of the antenna structure, and no further details will be given.

[0115] See also Figure 11 As shown, it is the total antenna pattern of the electronic device provided by the embodiment of the present disclosure at the first target frequency f1, Figure 11 As shown in FIG, when the antenna structure is applied to an electronic device, its overall radiation pattern indicates that the main radiation direction is completely directed to the top of the electronic device ( Figure 10 The antenna gain reaches its highest point in the direction toward the satellite, achieving an ideal end-fire characteristic. Figure 12 As shown, it is the directional pattern of the RHCP component of the electronic device provided by the embodiment of the present disclosure at the first target frequency f1, Figure 12 As shown in Figure 2, the main radiation direction is toward the top of the electronic device, that is, toward the satellite, and the antenna structure exhibits excellent end-fire circular polarization characteristics. Figure 13 As shown, it is the total antenna pattern of the electronic device provided by the embodiment of the present disclosure at the second target frequency f2 (taking f2=3.8 GHz as an example), Figure 13 As shown in FIG, the main radiation direction is completely toward the top of the electronic device ( Figure 10 The antenna gain is the highest in the direction toward the satellite, and the surface antenna structure achieves a good end-fire characteristic. Figure 14 As shown, it is the directional pattern of the RHCP component of the electronic device provided by the embodiment of the present disclosure at the second target frequency f2, Figure 14 As shown in the figure, the main radiation direction points to the top of the device and radiates towards the satellite, indicating that the antenna structure has good end-fire circular polarization characteristics.

[0116] It should be noted that the "total antenna pattern" described above refers to the distribution of the antenna structure's radiated power in all directions, indicating the radiation intensity at different angles (both horizontal and vertical). The "RHCP component pattern" described above describes the radiation characteristics of right-handed circularly polarized waves radiated by the antenna and is typically used to analyze the circular polarization performance of an antenna structure at a specific frequency.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. An antenna structure, comprising: a first metal surface, wherein a first side edge of the first metal surface has a first metal strip extending in a first length direction; a second metal surface, the second metal surface being located below the first metal surface, and projections of the second metal surface and the first metal surface in the thickness direction of the antenna structure at least partially overlapping, a first gap being formed between the second metal surface and the first metal surface, and the second metal surface having a second metal strip extending in a second length direction at a second side opposite to the first side, the second length direction being opposite to the first length direction; a first connecting member connecting the third side of the first metal surface and the fourth side of the second metal surface; A feeding point is located on the first metal surface or the second metal surface.

2. The antenna structure according to claim 1, wherein: The first connecting members include a plurality of first connecting members, and the plurality of first connecting members are respectively connected between the third side of the first metal surface and the fourth side of the second metal surface. The height of the first gap is between 2 mm and 4 mm.

3. The antenna structure according to claim 1, wherein: The feeding point is located on the first metal surface. When an excitation signal is fed into the feeding point, a first current is generated on the first metal surface, a second current is generated on the second metal surface, a third current is generated on the connecting member, a fourth current is generated on the first metal strip, and a fifth current is generated on the second metal strip. The first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current, and the third current, the fourth current and the fifth current excite the antenna structure to generate circularly polarized waves.

4. The antenna structure according to claim 1, wherein: The first side, the second side, the third side, and the fourth side have the same length, the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface, and the second bottom edge of the second metal surface have the same length, and the first metal strip has the same length as the second metal strip; In which, the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are between 1 / 8 and 1 / 4 wavelength of the first working frequency band of the antenna structure, and the lengths of the first side edge, the second side edge, the third side edge and the fourth side edge are close to 1 / 2 wavelength of the second working frequency band of the antenna structure, and the first working frequency band is lower than the second working frequency band.

5. The antenna structure according to any one of claims 1 to 4, further comprising: a third metal surface, the third metal surface being located on one side of the third side of the first metal surface, the third metal surface being flush with or higher than the first metal surface in the thickness direction of the antenna structure, the fifth side of the third metal surface having a third metal strip extending in the first length direction, the fifth side and the sixth side of the third metal surface being the same length as the third side, and the length of the third metal strip being equal to or greater than the length of the first metal strip; a fourth metal plane, the fourth metal plane being located below the third metal plane, and projections of the fourth metal plane and the third metal plane in the thickness direction of the antenna structure at least partially overlapping, a second gap being formed between the fourth metal plane and the third metal plane, the fourth metal plane being flush with the second metal plane in the thickness direction of the antenna structure or lower than the second metal plane, a fourth metal strip extending in the second length direction on a seventh side of the fourth metal plane, the seventh side being the same length as the eighth side of the fourth metal plane and the fourth side, and the length of the fourth metal strip being equal to or greater than the length of the second metal strip; The second connecting member connects the sixth side of the third metal surface and the eighth side of the fourth metal surface.

6. The antenna structure according to claim 5, wherein: The length of the third metal strip is 2 mm to 4 mm greater than the length of the first metal strip, and the length of the fourth metal strip is 2 mm to 4 mm greater than the length of the second metal strip; The second connecting members include a plurality of second connecting members, and the plurality of second connecting members are respectively connected between the sixth side of the third metal surface and the eighth side of the fourth metal surface.

7. An electronic device comprising: middle frame; a back cover, wherein the back cover and the middle frame form a cavity of the electronic device; a first metal surface, the first metal surface being located on an outer surface of the back cover, and a first side edge of the first metal surface having a first metal strip extending in a first length direction; a second metal surface, the second metal surface being located on an inner surface of the back cover, the projections of the second metal surface and the first metal surface in the thickness direction of the electronic device at least partially overlapping, a first gap being filled by the back cover between the second metal surface and the first metal surface, and the second metal surface having a second metal strip extending in a second length direction at a second side opposite to the first side, the second length direction being opposite to the first length direction; a first connecting member, passing through the back cover and connecting the third side of the first metal surface and the fourth side of the second metal surface; A feeding point is located on the first metal surface or the second metal surface.

8. The electronic device according to claim 7, wherein: The first connecting members include a plurality of first connecting members, and the plurality of first connecting members are respectively connected between the third side of the first metal surface and the fourth side of the second metal surface. The height of the first gap is between 2 mm and 4 mm.

9. The electronic device according to claim 7, wherein: The feeding point is located on the first metal surface. When an excitation signal is fed into the feeding point, a first current is generated on the first metal surface, a second current is generated on the second metal surface, a third current is generated on the connecting member, a fourth current is generated on the first metal strip, and a fifth current is generated on the second metal strip. The first current and the second current have equal amplitudes and opposite directions, the third current is perpendicular to the fourth current and the fifth current, and the third current, the fourth current and the fifth current excite the electronic device to generate circularly polarized waves.

10. The electronic device according to claim 7, wherein The first side, the second side, the third side, and the fourth side have the same length, the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface, and the second bottom edge of the second metal surface have the same length, and the first metal strip has the same length as the second metal strip; Among them, the lengths of the first top edge of the first metal surface, the first bottom edge of the first metal surface, the second top edge of the second metal surface and the second bottom edge of the second metal surface are between 1 / 8 and 1 / 4 wavelength of the first operating frequency band of the antenna structure, and the lengths of the first side edge, the second side edge, the third side edge and the fourth side edge are close to 1 / 2 wavelength of the second operating frequency band of the antenna structure, and the first operating frequency band is lower than the second operating frequency band.

11. The electronic device according to any one of claims 7 to 10, further comprising: a third metal surface, the third metal surface being located on one side of the third side of the first metal surface, the third metal surface being flush with or higher than the first metal surface in the thickness direction of the antenna structure, the fifth side of the third metal surface having a third metal strip extending in the first length direction, the fifth side and the sixth side of the third metal surface being the same length as the third side, and the length of the third metal strip being equal to or greater than the length of the first metal strip; a fourth metal plane, the fourth metal plane being located below the third metal plane, and projections of the fourth metal plane and the third metal plane in the thickness direction of the antenna structure at least partially overlapping, a second gap being formed between the fourth metal plane and the third metal plane, the fourth metal plane being flush with the second metal plane in the thickness direction of the antenna structure or lower than the second metal plane, a fourth metal strip extending in the second length direction on a seventh side of the fourth metal plane, the seventh side being the same length as the eighth side of the fourth metal plane and the fourth side, and the length of the fourth metal strip being equal to or greater than the length of the second metal strip; The second connecting member connects the sixth side of the third metal surface and the eighth side of the fourth metal surface.

12. The electronic device according to claim 11, wherein The length of the third metal strip is 2 mm to 4 mm greater than the length of the first metal strip, and the length of the fourth metal strip is 2 mm to 4 mm greater than the length of the second metal strip; The second connecting members include a plurality of second connecting members, and the plurality of second connecting members are respectively connected between the sixth side of the third metal surface and the eighth side of the fourth metal surface.

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