Coupled loop antenna and electronic device

Abstract

The application discloses a coupling loop antenna and electronic equipment, the coupling loop antenna comprises a non-conductive medium base, an antenna reference ground plate and a transceiving unit; the transceiving unit comprises a ground wire and a feed line, the ground wire and the feed line extend along the surface of the non-conductive medium base and are in the form of a non-closed ring as a whole; one end of the ground wire is connected with the antenna reference ground plate, and the other end of the ground wire is provided with a first coupling section; one end of the feed line is used for being connected with a transmitter and / or a receiver, and the other end of the feed line is provided with a second coupling section; the first coupling section and the second coupling section extend side by side and have a first gap therebetween; the first gap is configured to enable the first coupling section and the second coupling section to be coupled with each other to form self-resonance. The coupling loop antenna has good metal interference resistance and good performance, and has high flexibility.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a coupled loop antenna and electronic equipment. Background Technology

[0002] Antennas for mobile electronic devices such as laptops, tablets, and smartphones are highly sensitive to environmental conditions. A high concentration of metallic components in the surrounding environment can negatively impact antenna performance. Typically, a clearance zone needs to be established near the antenna, for example, within a 5mm radius. No metal structures other than the antenna itself should be placed within this clearance zone. If a sufficiently large clearance zone cannot be provided, a compromise of reduced antenna performance must be made. However, setting an antenna clearance zone wastes space and also affects the product's appearance. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a coupled loop antenna and electronic device, which makes the coupled loop antenna less susceptible to the influence of metal structures, has better performance, and is more flexible.

[0004] To solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions:

[0005] A coupled loop antenna, comprising:

[0006] Non-conductive dielectric substrate;

[0007] The antenna reference ground plane is connected to the non-conductive dielectric substrate on one side.

[0008] A transceiver unit is disposed on the non-conductive dielectric substrate. The transceiver unit includes a ground wire and a feed line. The ground wire and the feed line extend along the surface of the non-conductive dielectric substrate and are generally in a non-closed loop. One end of the ground wire is connected to the antenna reference ground plane, and the other end of the ground wire is provided with a first coupling segment. One end of the feed line is used to connect to a transmitter and / or a receiver, and the other end of the feed line is provided with a second coupling segment. The first coupling segment and the second coupling segment extend side by side and have a first gap between them. The first gap is configured to enable the first coupling segment and the second coupling segment to couple with each other to form a self-resonance.

[0009] In some embodiments, the ground wire and the feed wire extend side-by-side along two opposite side edges of the non-conductive dielectric substrate, then extend towards each other and intersect to form the first coupling segment and the second coupling segment; or

[0010] After the ground wire and the feed line extend towards each other, they extend side by side towards the inner side of the ring to form the first coupling segment and the second coupling segment.

[0011] In some embodiments, the ground wire has multiple grounding branches connected in parallel with different lengths, so that the transceiver unit can form multiple operating frequency points.

[0012] In some embodiments, the ground wire includes a first segment, a plurality of second segments, a third segment, and a first coupling segment. One end of the first segment is connected to the antenna reference ground plane, and the other end of the first segment is connected to one end of each of the second segments. The plurality of second segments are connected in parallel. One end of the third segment is connected to the other end of each of the second segments, and the other end of the third segment is connected to one end of the first coupling segment. The positions and lengths of the plurality of second segments are all different.

[0013] In some embodiments, the ground wire includes a plurality of first segments, second segments, and first coupling segments. The plurality of first segments are connected in parallel, and one end of each of the plurality of first segments is connected to the antenna reference ground. One end of each second segment is connected to the other end of each of the first segments, and the other end of the second segment is connected to one end of the first coupling segment. The positions and lengths of the plurality of first segments are different.

[0014] In some embodiments, the ground wire includes a plurality of first segments, a plurality of second segments, a third segment, and a first coupling segment. The positions and lengths of the plurality of first segments are different, the plurality of first segments are connected in parallel, and one end of each of the plurality of first segments is connected to the antenna reference ground. The positions and lengths of the plurality of second segments are different, the plurality of second segments are connected in parallel, and one end of each of the plurality of second segments is connected to the other end of each of the plurality of first segments through the same node. One end of the third segment is connected to the other end of each of the second segments, and the other end of the third segment is connected to one end of the first coupling segment.

[0015] In some embodiments, the non-conductive dielectric substrate has a first surface, a second surface, and a third surface, wherein the second surface is adjacent to the first surface and the third surface, respectively.

[0016] The ground wire includes a first coupling unit and a grounding unit, the first coupling unit including at least the first coupling segment; the feeder includes a second coupling unit and a power supply unit, the second coupling unit including at least the second coupling segment.

[0017] The first coupling unit and the second coupling unit are disposed on the first surface, the grounding unit and the feeding unit are disposed on the second surface, and the antenna reference ground is connected to the third surface of the non-conductive dielectric substrate.

[0018] In some embodiments, both the first coupling segment and the second coupling segment are located at the middle of the length direction of the non-conductive dielectric substrate; and / or

[0019] The first coupling segment and the second coupling segment are parallel to each other; and / or

[0020] One end of the feed line extends to a position close to the antenna reference ground.

[0021] In some embodiments, the width of the first gap is 0.1 mm to 0.5 mm; and / or

[0022] The lengths of the first coupling segment and the second coupling segment are 1 mm to 10 mm.

[0023] An electronic device includes a wireless communication device and a coupled loop antenna as described in any of the above embodiments, wherein the wireless communication device is connected to one end of the feed line and the antenna reference ground plane, respectively.

[0024] The coupled loop antenna of this embodiment can operate without an antenna reference ground plane due to the self-resonance formed by the first and second coupling sections. Therefore, it is immune to metallic components in the surrounding environment, exhibiting good anti-metal interference capability and performance. The two additional resonances formed by the introduction of the antenna reference ground plane are monopole resonances, which effectively expand the bandwidth and efficiency of the coupled loop antenna. Furthermore, the coupling and / or grounding portion of the coupled loop antenna can be equivalent to a matching circuit, which can adjust various parameters of the antenna, making the coupled loop antenna highly flexible. Attached Figure Description

[0025] Figure 1 and Figure 2 These are perspective views of the coupled loop antenna of the first embodiment of this application from different viewpoints;

[0026] Figure 3 and Figure 4 These are perspective views of a portion of the structure of the coupled loop antenna according to the first embodiment of this application from different viewpoints.

[0027] Figure 5 , Figure 6 and Figure 7 The images show a comparison of the radiation directions of the coupled loop antenna and the planar inverted F-shaped antenna at 5.15 GHz, 5.85 GHz, and 7.125 GHz, respectively.

[0028] Figure 8 The Smith analysis results for the coupled loop antenna are shown in the figure.

[0029] Figure 9 The return loss curves of coupled loop antennas with different loop circumferences are shown.

[0030] Figure 10 This is a perspective view of a portion of the mechanism of the coupled loop antenna according to the second embodiment of this application;

[0031] Figure 11 and Figure 12 These are perspective views of a portion of the coupled loop antenna structure according to the third embodiment of this application from different viewpoints.

[0032] Figure 13 and Figure 14 These are perspective views of a portion of the coupled loop antenna structure according to the fourth embodiment of this application from different viewpoints.

[0033] Figure 15 and Figure 16 These are perspective views of a portion of the coupled loop antenna structure according to the fifth embodiment of this application from different viewpoints.

[0034] Figure 17 and Figure 18 These are perspective views of a portion of the coupled loop antenna structure according to the sixth embodiment of this application from different viewpoints.

[0035] Figure 19 The above six embodiments show the admittance circle diagram of the coupled loop antenna at the 2.4 GHz frequency point;

[0036] Figure 20 This is an exploded view of a portion of the structure of an electronic device according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100-coupled loop antenna;

[0039] 110 - Non-conductive dielectric substrate; 111 - First surface; 112 - Second surface; 113 - Third surface;

[0040] 120-Antenna Reference Ground;

[0041] 130 - Ground wire; 131 - Grounding unit; 132 - First coupling unit; 133 - First coupling segment; 134 - First segment; 135 - Second segment; 136 - Third segment;

[0042] 140 - Feeder; 141 - Feeding unit; 142 - Second coupling unit; 143 - Second coupling section;

[0043] 200 - Electronic equipment; 210 - Housing. Detailed Implementation

[0044] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0045] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0046] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0047] These and other features of this application will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0048] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0049] The above and other aspects, features and advantages of this application will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0050] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0051] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0052] This application provides a coupled loop antenna 100, which can be applied to electronic devices 200 such as laptops, all-in-one computers, tablets, and smartphones. For example, the coupled loop antenna 100 can be used as the antenna of a laptop's wireless network card. (See reference...) Figures 1 to 4 As shown, the coupled loop antenna 100 of this application embodiment includes: a non-conductive dielectric substrate 110, an antenna reference ground plane 120, and a transceiver unit.

[0053] The non-conductive dielectric substrate 110 can be formed from various non-conductive materials, such as plastic, ceramic, or PCB substrate. The non-conductive dielectric substrate 110 can be in the shape of a cube, cuboid, sphere, cylinder, etc.

[0054] One side of the antenna reference ground plane 120 is connected to the non-conductive dielectric substrate 110. Optionally, the antenna reference ground plane 120 can be formed of a conductor. For example, the antenna reference ground plane 120 can be formed of a metal conductor such as copper foil or aluminum foil. Optionally, the antenna reference ground plane 120 can be wholly or partially attached to the surface of the non-conductive dielectric substrate 110. For example, taking the non-conductive dielectric substrate 110 as a cuboid, a part of the antenna reference ground plane 120 can be attached to the bottom surface of the cuboid, and another part of the antenna reference ground plane 120 can be parallel to the back surface of the cuboid, and these two parts can be connected to each other.

[0055] A transceiver unit is disposed on the non-conductive dielectric substrate 110. The transceiver unit includes a ground line 130 and a feed line 140, which extend along the surface of the non-conductive dielectric substrate 110 and are generally in a non-closed loop. One end of the ground line 130 is connected to the antenna reference ground plane 120, and the other end of the ground line 130 is provided with a first coupling segment 133. One end of the feed line 140 is used to connect to a transmitter and / or a receiver, and the other end of the feed line 140 is provided with a second coupling segment 143. The first coupling segment 133 and the second coupling segment 143 extend side by side and have a first gap between them; the first gap is configured to allow the first coupling segment 133 and the second coupling segment 143 to couple with each other to form a self-resonance. For example, taking the non-conductive dielectric substrate 110 as a cuboid shape, one end of the ground line 130 can be connected to a portion of the antenna reference ground plane 120.

[0056] The working principle of the coupled loop antenna 100: The first coupling segment 133 and the second coupling segment 143 will generate a self-resonance with wavelength 1λ. With the loop circumference of the loop as L, then λ = L. The rough estimation formula for the self-resonance frequency is: f1 = c / λ = c / L, where c represents the speed of light in vacuum.

[0057] Furthermore, with the introduction of the antenna reference ground plane 120, the coupled loop antenna 100 itself will form a reflection mapping on the antenna reference ground plane 120, forming a working principle similar to that of a monopole antenna, thereby generating monopole resonances with wavelengths of λ / 4 (corresponding to half of the loop circumference L, i.e., λ / 4 = L / 2; therefore λ = 2L, f2 = c / λ = c / 2L) and 3λ / 4 (corresponding to half of the loop circumference L, i.e., 3λ / 4 = 1L / 2; therefore λ = 2L / 3, f3 = c / λ = 3c / 2L).

[0058] Therefore, the coupled loop antenna 100 can generate three effective resonances with frequencies of f1, f2, and f3. The self-resonance at frequency f1 can operate without the antenna reference ground 120, thus it is immune to metallic components in the surrounding environment, making the coupled loop antenna 100 less susceptible to the influence of metallic structures. In addition, the other two resonances at frequencies f2 and f3, formed by the introduction of the antenna reference ground 120, are monopole resonances, which can effectively extend the bandwidth and efficiency of the coupled loop antenna 100.

[0059] The coupled loop antenna 100 and electronic device 200 will be described below with reference to a specific embodiment. The electronic device 200 can specifically be a laptop computer, and the coupled loop antenna 100 can serve as the antenna for the laptop's wireless network card. Based on the placement and shape of the coupled loop antenna 100 on the laptop computer, the dimensions of the non-conductive dielectric substrate 110 can be determined to be 30mm × 7mm × 3mm.

[0060] The loop circumference of the loop corresponding to the lowest operating frequency of the coupled loop antenna 100 is calculated on the non-conductive dielectric substrate 110. The rough estimation formulas for the various resonances that the coupled loop antenna can form are as follows.

[0061] f1 = c / λ = c / L

[0062] f2=c / λ=c / 2L

[0063] f3=c / λ=3c / 2L

[0064] Where c = 3 x 10^8 m, the speed of light in a vacuum; λ is the wavelength of the corresponding frequency, such as the wavelength of 2.4 GHz in a vacuum is about 125 mm, which is calculated by L = c / f = 3 x 10^8 / 2.4 x 10^9 ≈ 125 mm.

[0065] The wavelength in the medium is the wavelength in vacuum divided by the square root of the dielectric constant of the medium. Assuming the dielectric constant of the non-conductive dielectric substrate 110 is 6.5, which is 2.55 after taking the square root, then the loop circumference of the coupled loop antenna 100 based on this non-conductive dielectric substrate 110 should be at least 125mm / 2.55≈50mm.

[0066] Given the loop perimeter of the coupled loop antenna 100, the configuration of the coupled loop antenna 100 can be designed based on the loop perimeter.

[0067] The following simulation results of the Coupling Loop antenna 100 of this application and a conventional planar inverted F-shaped antenna (PIFA) will be used to explain in detail the effect of the Coupling Loop antenna 100 of this application.

[0068] Figure 5 , Figure 6 and Figure 7 The images show a comparison of the radiation directions of the coupled loop antenna 100 and the planar inverted F-shaped antenna at 5.15 GHz, 5.85 GHz, and 7.125 GHz, respectively. Figure 5 , Figure 6 and Figure 7 It can be seen that the radiation intensity of the coupled loop antenna 100 is greater than that of the PIFA antenna at 5.15 GHz, 5.85 GHz and 7.125 GHz.

[0069] Figure 8 The Smith analysis results for the coupled loop antenna 100 are shown in the figure. Figure 8 As can be seen, the coupled loop antenna 100 can be equivalent to a matching circuit, which can adjust various parameters of the antenna, making the coupled loop antenna 100 highly flexible.

[0070] Figure 9 The return loss curves of coupled loop antennas 100 with different loop circumferences are shown below. Figure 9 As can be seen, the operating frequency of the coupled loop antenna 100 can be adjusted by adjusting the loop circumference of the coupled loop antenna 100.

[0071] It should be noted that this explanation only uses the relationship between the loop circumference and the operating frequency as an example to illustrate the adjustment of various antenna parameters through the matching circuit. In actual implementation, other parameters of the coupled loop antenna 100 can also be adjusted through the matching circuit. For example, adjusting the gap width between the first coupling segment 133 and the second coupling segment 143, the positions of the first coupling segment 133 and the second coupling segment 143, and the lengths of the first coupling segment 133 and the second coupling segment 143 can all achieve the purpose of adjusting the parameters of the coupled loop antenna 100.

[0072] In some embodiments, the non-conductive dielectric substrate 110 may have a first surface 111, a second surface 112, and a third surface 113, with the second surface 112 adjacent to both the first surface 111 and the third surface 113. The ground wire 130 includes a first coupling unit 132 and a grounding unit 131, the first coupling unit 132 including at least a first coupling segment 133; the feed line 140 includes a second coupling unit 142 and a feed unit 141, the second coupling unit 142 including at least a second coupling segment 143. The first coupling unit 132 and the second coupling unit 142 are disposed on the first surface 111, the grounding unit 131 and the feed unit 141 are disposed on the second surface 112, and the antenna reference ground plane 120 is connected to the third surface 113 of the non-conductive dielectric substrate 110. Disposing the first coupling unit 132 and the second coupling unit 142 on a surface of the non-conductive dielectric substrate 110 different from the grounding unit 131 and the feed unit 141 can improve the transmission and reception efficiency of the antenna.

[0073] For example, taking the non-conductive dielectric substrate 110 as a cuboid, the first surface 111, the second surface 112, and the third surface 113 can be three consecutive sides of the cuboid. The antenna reference ground plane 120 can be attached to the third surface 113, the first coupling unit 132 and the second coupling unit 142 can be disposed on the first surface 111 opposite to the third surface 113, and the grounding unit 131 and the feeding unit 141 can be disposed on the second surface 112 between the first surface 111 and the third surface 113.

[0074] In some embodiments, the ground wire 130 and the feed wire 140 extend side-by-side along two opposite side edges of the non-conductive dielectric substrate 110, then extend towards each other and intersect to form the first coupling segment 133 and the second coupling segment 143. For example, as Figure 1 and Figure 10 As shown, the first coupling unit 132 and the second coupling unit 142 extend side-by-side along two opposite side edges of the first surface 111, then extend towards each other and intersect to form the first coupling segment 133 and the second coupling segment 143. In terms of length, the first coupling segment 133 and the second coupling segment 143 can be as follows: Figure 1 The figure shown has a large length, and can also be as follows: Figure 10 The diagram shows a relatively short length. Positionally, the first coupling segment 133 can be located near the second surface 112, as shown... Figure 1 As shown, the first coupling segment 133 can also be located at a position away from the second surface 112.

[0075] In some embodiments, after the ground wire 130 and the feed wire 140 extend towards each other, they extend side by side towards the inner side of the ring to form the first coupling segment 133 and the second coupling segment 143. For example, as Figure 11 and Figure 12 As shown, the first coupling unit 132 and the second coupling unit 142 can extend towards each other and then extend side by side to the inner side of the ring to form the first coupling segment 133 and the second coupling segment 143. The first coupling segment 133 and the second coupling segment 143 can even extend back to the second surface 112.

[0076] In some embodiments, the first coupling segment 133 and the second coupling segment 143 are both located at the middle of the length direction of the non-conductive dielectric substrate 110, thus the coupled loop antenna has better transmission and reception performance. Optionally, taking the example where the first coupling unit 132 and the second coupling unit 142 are both disposed on the first surface 111, the first coupling segment 133 and the second coupling segment 143 may be located at the middle of the length direction of the first surface 111.

[0077] In some embodiments, the first coupling segment 133 and the second coupling segment 143 are parallel to each other. This provides the coupled loop antenna with better transmission and reception performance. For example, the first coupling unit 132 and the second coupling unit 142 can extend side-by-side along two opposite side edges of the first surface 111, then extend parallel to each other towards each other and intersect to form the first coupling segment 133 and the second coupling segment 143. Alternatively, the first coupling unit 132 and the second coupling unit 142 can extend towards each other along the same straight line and extend parallel to each other towards the inner side of the loop to form the first coupling segment 133 and the second coupling segment 143.

[0078] In some embodiments, the width of the first gap is 0.1 mm to 0.5 mm. Within this width range, the self-resonance intensity formed by the first coupling segment 133 and the second coupling segment 143 is high, effectively extending the bandwidth within the operating frequency band. Optionally, the width of the first gap can be, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc.

[0079] In some embodiments, the lengths of the first coupling segment 133 and the second coupling segment 143 are 1 mm to 10 mm. That is, the coupling segment lengths of the ground wire 130 and the feed line 140 can be 1 mm to 10 mm. Within this length range, the self-resonance intensity formed by the first coupling segment 133 and the second coupling segment 143 is high, and the bandwidth within the operating frequency band is effectively extended. Optionally, the lengths of the first coupling segment 133 and the second coupling segment 143 can be, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm, etc.

[0080] In some embodiments, one end of the feed line 140 extends close to the antenna reference ground plane 120. One end of the feed line 140 is used to connect to a transmitter and / or receiver. The transmitter and / or receiver need to connect not only to one end of the feed line 140 but also to the antenna reference ground plane 120. Therefore, extending one end of the feed line 140 close to the antenna reference ground plane 120 facilitates the connection of the coupled loop antenna 100 to the transmitter and / or receiver. For example, if the antenna reference ground plane 120 is disposed on a third surface 113, and the feed element 141 of the feed line 140 is disposed on a second surface 112, the free end of the feed element 141 can extend to the position where the second surface 112 and the third surface 113 intersect.

[0081] In some embodiments, the ground wire 130 has multiple parallel ground branches of different lengths to enable the transceiver unit to form multiple operating frequencies. By configuring multiple parallel ground branches of different lengths on the ground wire, the coupled loop antenna 100 can form multiple rings of different shapes and loop circumferences, effectively creating multiple coupled loop antennas 100 of different shapes and loop circumferences, thereby forming multiple operating frequencies and expanding the bandwidth of the coupled loop antenna 100. The loop circumference is actually the path length of the current flowing from one end of the feed line 140 to one end of the ground wire 130, which is close to the length of the ring formed by the ground wire 130 and the feed line 140.

[0082] In some embodiments, the ground wire 130 includes a first segment 134, a plurality of second segments 135, a third segment 136, and a first coupling segment 133. One end of the first segment 134 is connected to the antenna reference ground plane 120, and the other end of the first segment 134 is connected to one end of each of the second segments 135. The plurality of second segments 135 are connected in parallel. One end of the third segment 136 is connected to the other end of each of the second segments 135, and the other end of the third segment 136 is connected to one end of the first coupling segment 133. The positions and lengths of the plurality of second segments 135 are all different. Because the positions and lengths of the plurality of second segments 135 are different, it is possible to equivalently generate multiple rings with different shapes and loop circumferences, and thus equivalently generate multiple coupled loop antennas 100 with different shapes and loop circumferences. For example, Figure 1 and Figure 10 As shown, the ground wire 130 may include two second segments 135, each of which can be L-shaped and form a rectangle. One end of the first segment 134 can be connected to one vertex of the rectangle, and one end of the third segment 136 can be connected to another vertex on the diagonal.

[0083] In some embodiments, the ground wire 130 includes a plurality of first segments 134, second segments 135, and a first coupling segment 133. The plurality of first segments 134 are connected in parallel, and one end of each of the first segments 134 is connected to the antenna reference ground plane 120. One end of each second segment 135 is connected to the other end of each of the first segments 134, and the other end of the second segment 135 is connected to one end of the first coupling segment 133. The positions and lengths of the plurality of first segments 134 are different. By setting multiple first ends with different lengths and positions, multiple rings with different shapes and loop circumferences can be formed, thereby achieving the purpose of expanding the bandwidth of the coupled loop antenna 100. For example, as... Figure 13 and Figure 14 As shown, a first segment 134 can be a straight line or an L-shaped segment 134.

[0084] In some embodiments, the ground wire 130 includes a plurality of first segments 134, a plurality of second segments 135, a third segment 136, and a first coupling segment 133. The positions and lengths of the plurality of first segments 134 are different, and the plurality of first segments 134 are connected in parallel, with one end of each of the plurality of first segments 134 connected to the antenna reference ground plane 120. The positions and lengths of the plurality of second segments 135 are also different, and the plurality of second segments 135 are connected in parallel, with one end of each of the plurality of second segments 135 connected to the other end of each of the plurality of first segments 134 through the same node. One end of the third segment 136 is connected to the other end of each of the second segments 135, and the other end of the third segment 136 is connected to one end of the first coupling segment 133. By setting a plurality of first segments 134 with different lengths and positions, and a plurality of second segments 135 with different lengths and positions, various loops can be formed, thereby significantly expanding the bandwidth of the coupled loop antenna 100.

[0085] For example, such as Figure 15 and Figure 16 As shown, the ground wire 130 may include two first segments 134 and two second segments 135. One of the two first segments 134 may be straight and the other may be L-shaped. Both of the two second segments 135 may be L-shaped and form a rectangle. Both of the two first segments 134 may be connected to one vertex of the rectangle. The third segment 136 may be connected to another vertex on the diagonal.

[0086] For example, such as Figure 17 and Figure 18 As shown, the first segment 134, which is L-shaped, can be connected to one vertex of the rectangle, and the third segment 136 can be connected to another vertex on the diagonal. The first segment 134, which is straight, can be connected to another vertex between the first segment 134 and the third segment 136, which are L-shaped.

[0087] Figure 19 The above six embodiments are illustrated with admittance circle diagrams of the coupled loop antenna 100 at 2.4 GHz. Figure 19 It is known that different shapes and loop circumferences not only affect the operating frequency of the coupled loop antenna 100, but also affect its impedance.

[0088] See Figure 20 As shown in the illustration, this application also provides an electronic device 200, which may include a housing 210, a wireless communication device disposed within the housing 210, and a coupled loop antenna 100 as described in any of the above embodiments. The wireless communication device is connected to one end of the feed line 140 and the antenna reference ground plane 120, respectively. The electronic device 200 includes, but is not limited to, laptops, tablets, all-in-one computers, and smartphones, etc.

[0089] Since the above-mentioned coupled loop antenna 100 has good anti-interference ability against metal structures, good performance, and high flexibility, the electronic device 200 using the above-mentioned coupled loop antenna 100 is beneficial to improving space utilization and wireless communication effect.

[0090] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A coupled loop antenna, characterized by, The application relates to an antenna, which comprises the following parts: a non-conductive medium base; an antenna reference floor connected with the non-conductive medium base; a transceiving unit arranged on the non-conductive medium base, the transceiving unit comprising a ground wire and a feed line, the ground wire and the feed line extending along the surface of the non-conductive medium base and forming a non-closed loop as a whole; one end of the ground wire is connected with the antenna reference floor, and the other end of the ground wire is provided with a first coupling section; one end of the feed line is used for being connected with a transmitter and / or a receiver, and the other end of the feed line is provided with a second coupling section; the first coupling section and the second coupling section extend side by side and have a first gap therebetween; the first gap is configured to enable the first coupling section and the second coupling section to be coupled with each other to form self-resonance; the ground wire and the feed line extend side by side along two opposite side edges of the non-conductive medium base, then extend towards each other and interleave with each other to form the first coupling section and the second coupling section; or the ground wire and the feed line extend towards each other, then extend side by side to the inside of the loop to form the first coupling section and the second coupling section; the non-conductive medium base has a first surface, a second surface and a third surface, the second surface is adjacent to the first surface and the third surface respectively; the ground wire comprises a first coupling unit and a grounding unit, the first coupling unit at least comprises the first coupling section; the feed line comprises a second coupling unit and a feed unit, the second coupling unit at least comprises the second coupling section; the first coupling unit and the second coupling unit are arranged on the first surface, and the grounding unit and the feed unit are arranged on the second surface; the antenna reference floor is connected with the third surface of the non-conductive medium base.

2. The coupled loop antenna of claim 1, wherein, The ground wire has a plurality of grounding branches which are connected in parallel with each other and have different lengths, so that the transceiving unit forms a plurality of working frequency points.

3. The coupled loop antenna of claim 2, wherein, The ground wire comprises a first section, a plurality of second sections, a third section and the first coupling section; one end of the first section is connected with the antenna reference floor, the other end of the first section is connected with one end of each of the second sections respectively, the plurality of second sections are connected in parallel, one end of the third section is connected with the other end of each of the second sections respectively, and the other end of the third section is connected with one end of the first coupling section; the positions and lengths of the plurality of second sections are different.

4. The coupled loop antenna of claim 2, wherein, The ground wire comprises a plurality of first sections, a second section and the first coupling section; the plurality of first sections are connected in parallel, one end of each of the plurality of first sections is connected with the antenna reference floor, one end of the second section is connected with the other end of each of the first sections respectively, and the other end of the second section is connected with one end of the first coupling section; the positions and lengths of the plurality of first sections are different.

5. The coupled loop antenna of claim 2, wherein, The ground wire comprises a plurality of first segments, a plurality of second segments, a third segment and the first coupling segment, the positions and lengths of the plurality of first segments are different, the plurality of first segments are connected in parallel, and one end of the plurality of first segments is connected with the antenna reference ground plate; the positions and lengths of the plurality of second segments are different, the plurality of second segments are connected in parallel, and one end of the plurality of second segments is connected with the other end of the plurality of first segments through the same node; one end of the third segment is connected with the other end of each second segment, and the other end of the third segment is connected with one end of the first coupling segment.

6. The coupled loop antenna of claim 1, wherein, The first coupling segment and the second coupling segment are located at the middle part of the length direction of the non-conductive medium substrate; and / or The first coupling segment and the second coupling segment are parallel to each other; and / or One end of the feed line extends to a position close to the antenna reference ground plate.

7. The coupled loop antenna of claim 1, wherein, The width of the first gap is 0.1mm to 0.5mm; and / or The length of the first coupling segment and the second coupling segment is 1mm to 10mm.

8. An electronic device, comprising: A wireless communication device and a coupling loop antenna as claimed in any one of claims 1 to 7, the wireless communication device is connected with one end of the feed line and the antenna reference ground plate respectively.

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