Antenna and wireless gateway

Abstract

The present application provides an antenna and a wireless communication device, the antenna comprising an annular radiator, a first radiating arm and a second radiating arm, the annular radiator is provided with an opening, the annular radiator has a first connecting portion and a second connecting portion located on both sides of the opening, the first connecting portion is provided with a feeding potential, the second connecting portion is provided with a grounding position, the first radiating arm and the second radiating arm are both located outside the area surrounded by the annular radiator, the first radiating arm is connected to the first connecting portion, the second radiating arm is connected to the second connecting portion, and the first radiating arm and the second radiating arm are respectively extended in two opposite directions. The opening of the antenna provided by the present application can avoid mutual interference between the grounding position and the feeding potential, the first radiating arm and the second radiating arm of the antenna are respectively routed in two opposite directions, avoiding mutual interference between the first radiating arm and the second radiating arm, and effectively improving the radiation efficiency and transmission distance of the antenna.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna and a wireless gateway. Background Art

[0002] With the continuous development of antenna technology, antennas are currently widely used. Antennas can be used to send and receive Wi-Fi or Zigbee signals, etc. Due to the limitations of the existing antenna structure, there will be radiation interference between the radiation structures of the antennas themselves, and the grounding and the feed source are also prone to mutual interference, which makes the radiation and receiving performance of the antenna worse, which is not conducive to further optimization of the antenna performance of the wireless gateway. Summary of the invention

[0003] An embodiment of the present application provides an antenna.

[0004] The present application provides an antenna, including an annular radiator, a first radiating arm and a second radiating arm, the annular radiator is provided with an opening, the annular radiator has a first connecting portion and a second connecting portion located on both sides of the opening, the first connecting portion is provided with a feeding potential, the second connecting portion is provided with a grounding potential, the first radiating arm and the second radiating arm are both located outside the area surrounded by the annular radiator, the first radiating arm is connected to the first connecting portion, the second radiating arm is connected to the second connecting portion, and the first radiating arm and the second radiating arm are respectively extended in two opposite directions.

[0005] The antenna provided by the present application is provided with a grounding position and a feeding potential at the first connecting part and the second connecting part on both sides of the opening, respectively. In this way, the opening can separate the grounding position and the feeding potential from each other to avoid mutual interference between the grounding position and the feeding potential. In this way, the actual bandwidth can be adjusted and matched, and the antenna can be used as a dipole antenna to ensure the stability of the radiation efficiency. At the same time, the first radiating arm and the second radiating arm of the antenna are respectively routed in two opposite directions to avoid mutual interference between the first radiating arm and the second radiating arm. At the same time, such a routing method can avoid some interference due to insufficient clearance of the internal surrounding environment or interference of components. The ends of the first radiating arm and the second radiating arm can be away from the feeder, so that the first radiating arm and the second radiating arm can avoid interference from the feeder and thus can better perform their performance, effectively improving the radiation efficiency and radiation distance of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0007] Figure 1It is a schematic diagram of the structure of a wireless communication device in an assembled state provided by an embodiment of the present application.

[0008] Figure 2 Yes Figure 1 Exploded schematic diagram of the wireless communication device shown.

[0009] Figure 3 Yes Figure 2 A schematic structural diagram of an antenna of a wireless communication device is shown.

[0010] Figure 4 like Figure 3 A schematic diagram of the partial structure of the antenna and feeder of the wireless communication device in a connected state.

[0011] Figure 5 Yes Figure 2 A schematic diagram of the dimensions of a partial structure of a feeder line of a wireless communication device is shown.

[0012] Figure 6 like Figure 2 The directional pattern of the antenna in the wireless communication device is shown. DETAILED DESCRIPTION

[0013] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0014] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0015] See also Figure 1 and Figure 2 The present application provides a wireless communication device 20 , which may be a wireless gateway, a wireless router or other devices. The wireless communication device 20 includes a feeder 22 and an antenna 10 .

[0016] In this embodiment, the wireless communication device 20 includes a housing 21, which may include a top housing 211 and a bottom housing 212. The top housing 211 is disposed on the bottom housing 212. The top housing 211 and the bottom housing 212 together define a receiving cavity 2121. The receiving cavity 2121 is used to receive structures such as a circuit board. The top housing 211 and the bottom housing 212 may be detachably connected. The top housing 211 may be a mushroom-shaped housing, a sphere, a hemispherical body, or a rectangular body, and may be specifically designed according to actual needs.

[0017] In this embodiment, a mounting portion 213 is provided in the housing 21, and the mounting portion 213 includes a planar portion, and the antenna 10 can be laid flat on the planar portion of the mounting portion 213, so that the original shape of the antenna 10 can be maintained as much as possible, thereby maintaining the excellent antenna performance of the antenna 10. It should be noted that the mounting portion 213 can be directly processed on the inner surface of the housing 21, or the mounting portion 213 can be a separate mounting plate, which is fixed to the inner surface of the housing 21, and the antenna 10 is attached to the mounting plate.

[0018] In this embodiment, the antenna device 20 further includes a circuit board (not shown), which is electrically connected to the antenna 10 via a feeder line to feed an excitation current to the antenna 10. The circuit board can be arranged with a relative spacing from the mounting portion 213. For example, the two can be arranged with a relative spacing in the depth direction of the receiving cavity 2121. The antenna 10 can be arranged on the surface of the mounting portion 213 away from the circuit board to prevent the electronic components on the circuit board from interfering with the antenna 10. In addition, a clearance area can also be directly provided on the circuit board, and the antenna 10 is arranged in the clearance area.

[0019] In this embodiment, the antenna 10 may be a Zigbee antenna or a Wi-Fi antenna, etc., and the following description will be made by taking the case where the antenna 10 is a Zigbee antenna as an example.

[0020] In this embodiment, the antenna 10 may be a flexible structure, such as a Zigbee flexible antenna. The antenna 10 may be a flexible sheet structure, which may be attached to the plane portion of the mounting portion 213. In addition, the antenna 10 may also be attached to a surface with a relatively gentle curvature. By setting the antenna 10 as a flexible sheet structure, the volume of the antenna 10 can be reduced, and the space occupied can be reduced. At the same time, the antenna 10 only needs to be bonded to the mounting portion 213.

[0021] See also Figure 3 In this embodiment, the antenna 10 includes a ring radiator 11, a first radiating arm 12 and a second radiating arm 13. The ring radiator 11 is provided with an opening 111. The ring radiator 11 has a first connecting portion 1111 and a second connecting portion 1112 located on both sides of the opening 111. The first connecting portion 1111 is provided with a feeding potential 1113, and the second connecting portion 1112 is provided with a grounding position 1114. The first radiating arm 12 and the second radiating arm 13 are both located outside the area surrounded by the ring radiator 11. The first radiating arm 12 is connected to the first connecting portion 1111, and the second radiating arm 13 is connected to the second connecting portion 1112, and the first radiating arm 12 and the second radiating arm 13 are respectively extended in two opposite directions. The length of the antenna 10 can meet one quarter of the wavelength, and can be specifically adjusted according to the implementation requirements.

[0022] By providing a feeding potential 1113 on the first connection part 1111, providing a grounding position 1114 on the second connection part 1112, and the first radiation arm 12 is connected to the first connection part 1111, the second radiation arm 13 is connected to the second connection part 1112, and the first radiation arm 12 and the second radiation arm 13 are respectively extended in two opposite directions, so that the antenna 10 is used as a dipole antenna, which is also called a PIFA antenna, and the dipole antenna has a more stable radiation performance. Since the first radiation arm 12 and the second radiation arm 13 are both located outside the area surrounded by the annular radiator 11, the first radiation arm 12 and the second radiation arm 13 can be prevented from being interfered by the signal of the annular radiator 11.

[0023] The antenna 10 provided in the present application is provided with a grounding position 1114 and a feeding potential 1113 on the first connecting portion 1111 and the second connecting portion 1112 on both sides of the opening 111, respectively. In this way, the opening 111 can separate the grounding position 1114 and the feeding potential 1113 from each other to avoid mutual interference between the grounding position 1114 and the feeding potential 1113. In this way, the actual bandwidth can be adjusted and matched. At the same time, the antenna 10 can be used as a dipole antenna to ensure the stability of the radiation efficiency. At the same time, the first radiating arm 12 and the second radiating arm 13 of the antenna 10 are respectively routed in two opposite directions to avoid mutual interference between the first radiating arm 12 and the second radiating arm 13. At the same time, such a routing method can avoid some interference caused by insufficient clearance of the internal surrounding environment or components. The routing directions of the first radiating arm 12 and the second radiating arm 13 can be far away from the feed line 22, so that the end of the first radiating arm 12 and the end of the second radiating arm 13 can avoid the interference of the feed line 22, so as to better exert the performance, and effectively improve the radiation efficiency and transmission distance of the antenna 10.

[0024] In this embodiment, the annular radiator 11 may be substantially in a rectangular annular structure, and the annular radiator 11 has a length direction X and a width direction Y, and the length direction X is substantially perpendicular to the width direction Y. The annular radiator 11 includes a first radiating edge 1115 and a second radiating edge 1116 opposite to each other, and the opening 111 passes through the first radiating edge 1115. The first radiating edge 1115 and the second radiating edge 1116 may serve as long sides of the annular radiator 11, and the first radiating edge 1115 and the second radiating edge 1116 may be substantially parallel to each other, and both may be substantially parallel to the length direction X. The annular radiator 11 further includes a third radiating edge 1117 and a fourth radiating edge 1118, the third radiating edge 1117 and the fourth radiating edge 1118 are arranged at intervals relative to each other and are both connected between the first radiating edge 1115 and the second radiating edge 1116, the third radiating edge 1117 and the fourth radiating edge 1118 can be arranged in parallel and at intervals, both of which can be substantially parallel to the width direction Y, and the third radiating edge 1117 and the fourth radiating edge 1118 can serve as the short side edges of the annular radiator 11. This is conducive to the radiation of the signal of the fed excitation current along a longer annular path, and is conducive to improving the radiation efficiency and radiation range of the annular radiator 11.

[0025] In this embodiment, the annular radiator 11 defines a hollow portion 1119, and the hollow portion 1119 is connected to the opening 111, that is, the hollow portion 1119 is formed in the area surrounded by the annular radiator 11. In this embodiment, the hollow portion 1119 is a strip-shaped hollow area, and the hollow portion 1119 is extended in a straight line. Specifically, the hollow portion 1119 can be extended along the length direction X of the annular radiator 11. By setting the hollow portion 1119, it is beneficial to control the frequency bandwidth of the antenna 10, so that the bandwidth required by the actual antenna 10 can be debugged and matched, so that the bandwidth of the antenna 10 is within a suitable bandwidth range.

[0026] In this embodiment, the first connection portion 1111 is connected to one end of the first radiation edge 1115 located at the opening 111, and the second connection portion 1112 is connected to the other end of the first radiation edge 1115 located at the opening 111, and the first connection portion 1111 and the second connection portion 1112 are spaced apart from each other by the opening 111. In this way, the feeding potential 1113 provided at the first connection portion 1111 can be spaced apart from the grounding position 1114 provided at the second connection portion 1112, effectively avoiding mutual interference between the feeding potential 1113 and the grounding position 1114, and at the same time, the excitation current flowing through the first connection portion 1111 and the excitation current flowing through the second connection portion 1112 will not interfere with each other, effectively improving the radiation efficiency of the antenna 10.

[0027] In some embodiments, Figure 3As shown, the first connection part 1111 and the second connection part 1112 can be arranged approximately in parallel and at intervals, and the two can be extended approximately in parallel to the width direction Y. This can avoid the excitation currents flowing through the first connection part 1111 and the second connection part 1112 being evenly spaced from each other, thereby avoiding mutual interference between the excitation currents of the first connection part 1111 and the second connection part 1112, which is beneficial to improving the radiation efficiency and radiation distance of the antenna 10.

[0028] In some embodiments, Figure 3 As shown, the feeding potential 1113 can be arranged adjacent to the end of the first connection portion 1111 away from the annular radiator 11, and the grounding position 1114 can be arranged adjacent to the end of the second connection portion 1112 close to the annular radiator 11. In this way, the feeding potential 1113 and the grounding position 1114 can be kept as far away as possible to avoid mutual interference.

[0029] In this embodiment, the first radiating arm 12 can be connected to an end of the first connecting portion 1111 away from the annular radiator 11, and the second radiating arm 13 can be connected to an end of the second connecting portion 1112 away from the annular radiator 11. The first radiating arm 12 is extended in the direction of the third radiating edge 1117, and the second radiating arm 13 is extended in the direction of the fourth radiating edge 1118, so that the first radiating arm 12 and the second radiating arm 13 are respectively routed in two mutually divergent directions, which can avoid some interference due to insufficient clearance in the surrounding environment or interference from components. Since the first radiating arm 12 is extended in the direction of the third radiating edge 1117, one end of the first radiating arm 12 is far away from the feeding potential 1113, which can better exert the radiation performance of the first radiating arm 12. Correspondingly, the end of the second radiating arm 13 away from the second connecting portion 1112 is also far away from the feeding potential 1113, which can also better exert the radiation performance of the second radiating arm 13.

[0030] In this embodiment, the first radiation arm 12 and the second radiation arm 13 are arranged substantially symmetrically with respect to the opening 111. In this way, the first radiation arm 12 and the second radiation arm 13 can transmit and receive substantially the same radiation signal, thereby achieving uniform transmission and reception of signals of the antenna 10. At the same time, the annular radiator 11 can also be arranged symmetrically with respect to the opening 111, thereby further ensuring uniformity of signal transmission and reception at the left and right ends of the antenna 10.

[0031] In some embodiments, each of the first radiation arm 12 and the second radiation arm 13 includes a first sheet 121 and a second sheet 122 connected to each other, the width of the second sheet 122 is greater than the width of the first sheet 121, the second sheet 122 of the first radiation arm 12 is connected to the first connection portion 1111 through the first sheet 121, and the second sheet 122 of the second radiation arm 13 is connected to the second connection portion 1112 through the first sheet 121. Specifically, the first sheet 121 and the second sheet 122 are an integral structure, the thickness of the first sheet 121 and the thickness of the second sheet 122 may be substantially the same, wherein two surfaces of the first sheet 121 in the thickness direction may be respectively arranged substantially flush with the surfaces corresponding to the second sheet 122 in the thickness direction, which is conducive to processing and forming the first radiation arm 12 and the second radiation arm 13.

[0032] Furthermore, the width of the second sheet 122 can be greater than the width of the first sheet 121 at all places, and the second sheet 122 serves as the end of the radiation arm. In this way, by widening the width of the end of the first radiation arm 12 and the end of the second radiation arm 13, the frequency of the antenna 10 is reduced, so that the frequency of the antenna 10 corresponds to the required 2.4G frequency band, which not only improves the radiation efficiency of the antenna 10 in the frequency band, but also helps to reduce the overall length of the antenna 10, because in this way, the first radiation arm 12 and the second radiation arm 13 do not need to be set very long to achieve coverage of the 2.4G frequency band.

[0033] In some embodiments, a first gap 1216 is formed between the first sheet 121 of the first radiation arm 12 and the annular radiator 11, and a second gap 1226 is formed between the first sheet 121 of the second radiation arm 13 and the annular radiator 11. Specifically, the first gap 1216 is formed between the first sheet 121 of the first radiation arm 12 and the first portion of the first radiation edge 1115, and the second gap 1226 is formed between the first sheet 121 of the second radiation arm 13 and the second portion of the first radiation edge 1115, and the first portion and the second portion are respectively located on both sides of the opening 111. By providing the first gap 1216 and the second gap 1226, the first radiation arm 12 and the second radiation arm 13 can be separated from the annular radiator 11 as much as possible, thereby avoiding mutual interference between the first radiation arm 12 and the second radiation arm 13 and the annular radiator 11, and at the same time, the current path of the entire antenna 10 can be increased to ensure the radiation range.

[0034] In some embodiments, the first sheet 121 of the first radiation arm 12 and the second radiation arm 13 can be extended in a roughly straight line. Exemplarily, the first sheet 121 of the first radiation arm 12 and the second radiation arm 13 can be extended in a direction parallel to the first radiation edge 1115, so that the excitation current can pass directly through the first sheet 121 and the second sheet 122, thereby effectively improving the uniformity of the radiation signals of the first radiation arm 12 and the second radiation arm 13.

[0035] In this embodiment, the first radiating arm 12 has a first side 1211 away from the second radiating arm 13, the second radiating arm 13 has a second side 1311 away from the first radiating arm 12, and a first spacing L1 is provided between the first side 1211 and the second side 1311. The first spacing L1 may be greater than or equal to 39.0 mm and less than or equal to 43 mm. Specifically, the extension direction of the first side 1211 and the second side 1311 may be substantially parallel to the width direction Y of the annular radiator 11. It is understandable that the first spacing L1 may be the spacing between the first side 1211 and the second side 1311 along the width direction Y. By controlling the first spacing L1 within the above range, the radiation distance and radiation efficiency of the antenna 10 may be effectively improved.

[0036] In this embodiment, the first radiating arm 12 has a third side 1212 away from the first radiating edge 1115, the second radiating arm 13 has a fourth side 1312 away from the first radiating edge 1115, a second spacing L2 is provided between the third side 1212 and the second radiating edge 1116, and a third spacing L3 is provided between the fourth side 1312 and the second radiating edge 1116, wherein the second spacing L2 and the third spacing L3 may be greater than or equal to 9.0 mm and less than or equal to 9.4 mm. Specifically, the extension direction of the third side 1212 and the fourth side 1312 may be substantially parallel to the length direction X of the annular radiator 11, and the third side 1212 and the fourth side 1312 may be substantially flush. Further, the second spacing L2 between the third side 1212 and the second radiating edge 1116 may be equal everywhere, and accordingly, the second spacing L3 between the fourth side 1312 and the second radiating edge 1116 may also be equal everywhere. By controlling the second interval L2 and the third interval L3 within the above range, the radiation distance and radiation efficiency of the antenna 10 can be further improved.

[0037] In some embodiments, Figure 3As shown, a first notch 1213 is provided at the connection between the first radiation arm 12 and the first connection portion 1111, and a second notch 1313 is provided at the connection between the second radiation arm 13 and the second connection portion 1112. In order to prevent the actual frequency of the antenna 10 from being insufficient during debugging, the first notch 1213 and the second notch 1313 are provided at the connection between the corresponding radiation arm and the corresponding connection arm, so that the network waveform is shifted to the low frequency part, so that the frequency band of the antenna 10 for transmission and reception can cover the required low frequency band.

[0038] See also Figure 5 In this embodiment, the feed line 22 has a grounding layer 222 and a core 221 that are electrically isolated from each other, the grounding layer 222 is connected to the grounding position 1114, and the core 221 is connected to the feed potential 1113. Through one feed line 22, the grounding position 1114 can be grounded at the same time, and the corresponding excitation current can be fed into the feed potential 1113, which can simplify the wiring structure of the antenna 10 and avoid interference to the antenna 10 when multiple lines are connected to the antenna 10. The feed line 22 also includes a dielectric layer 223 and an insulating layer 224, the dielectric layer 223 is wrapped around the core 221, the grounding layer 222 is wrapped around the dielectric layer 223, and the insulating layer 224 is wrapped around the grounding layer 222. The core 221 can be electrically connected to the feed potential 1113 for feeding the excitation current into the feed potential 1113, and the grounding layer 222 is used to ground the feed potential 1113. Exemplarily, the exposed length X1 of the core 221 can be greater than or equal to 1.4 mm and less than or equal to 1.6 mm, the exposed length X2 of the dielectric layer 223 can be greater than or equal to 0.9 mm and less than or equal to 1.1 mm, and the exposed length X3 of the ground layer 222 can be greater than or equal to 1.9 mm and less than or equal to 2.1 mm. By controlling the core, dielectric layer 223 and ground layer 222 of the feeder 22 within the above range, the influence of the feeder 22 on the standing wave and isolation of the antenna 10 can be reduced, so that the standing wave and isolation of the antenna 10 meet the requirements, and the radiation performance of the antenna 10 is effectively guaranteed.

[0039] Please refer to Table 1 and Table 2. Table 1 shows the antenna performance corresponding to the antenna before improvement, Table 3 shows the signal transmission distance of the antenna before improvement in different scene modes, Table 2 shows the antenna performance corresponding to the improved antenna 10 provided by the present application, and Table 4 shows the signal transmission distance of the improved antenna 10 provided by the present application in different scene modes. Obviously, it can be seen that the antenna 10 provided by the present application, by providing the first connection part 1111 of the antenna 10 with a feeding potential 1113, the second connection part 1112 with a grounding position 1114, and the first radiation arm 12 is connected to the first connection part 1111, the second radiation arm 13 is connected to the second connection part 1112, and the first radiation arm 12 and the second radiation arm 13 are respectively extended in two opposite directions, which can significantly improve the gain and radiation efficiency of the antenna 10, and also greatly improve the signal transmission distance of the antenna 10. The efficiency of the improved antenna 10 is more than 10% higher than the overall efficiency of the old antenna. The radiation efficiency of the improved antenna 10 is between 71.10% and 75.49%, which obviously greatly improves the radiation efficiency. The signal transmission distance of the antenna 10 exceeds that of the antenna before improvement by about 30m, reaching the target value of more than 135m.

[0040] Frequency (MHz) Gain(dBi) Radiation efficiency (%) 2400.0 1.99 61.69 2410.0 2.17 62.26 2420.0 2.40 63.67 2430.0 2.58 63.81 2440.0 2.77 63.76 2450.0 3.04 64.96 2460.0 3.23 60.72 2470.0 3.28 61.19 2480.0 3.23 61.00 2490.0 3.12 60.02 2500.0 3.02 61.92

[0041] Table 1 (Scheme before optimization)

[0042]

[0043]

[0044] Table 2 (Optimized solution)

[0045]

[0046] Table 3 (Optimized solution)

[0047]

[0048] Table 4 (Optimized solution)

[0049] Please see again Figure 6 , Figure 6 In order to improve the radiation pattern of the antenna 10, by controlling the first spacing L1, the second spacing L2 and the third spacing L3 of the antenna 10 within the above-mentioned value range, it can be obviously seen that the antenna 10 has a strong radiation intensity in multiple directions. In particular, the radiation intensity of the antenna 10 in the Z-axis direction is significantly enhanced, which can significantly increase the radiation distance and the ability to send and receive signals of the antenna 10 in this direction.

[0050] It should be understood that in this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In this application, "plurality" includes two or more.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 present application. In this specification, the schematic representations 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 any one or more embodiments or examples in a suitable manner. 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, without contradiction.

[0052] In addition, in the absence of contradiction, those skilled in the art may combine and combine the different embodiments or examples and the features of different embodiments or examples described in this specification. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is 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 replace some of the technical features therein by equivalents; and these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna, characterized in that: include: An annular radiator, the annular radiator is provided with an opening, the annular radiator has a first connecting portion and a second connecting portion located on both sides of the opening, the first connecting portion is provided with a feeding potential, and the second connecting portion is provided with a grounding potential; A first radiating arm and a second radiating arm, wherein the first radiating arm and the second radiating arm are both located outside the area surrounded by the annular radiator, the first radiating arm is connected to the first connecting portion, the second radiating arm is connected to the second connecting portion, and the first radiating arm and the second radiating arm are respectively extended in two opposite directions; Each of the first radiation arm and the second radiation arm includes a first sheet and a second sheet connected to each other; The second sheet of the first radiating arm is connected to the first connecting portion through the corresponding first sheet, and a first gap is formed between the first sheet of the first radiating arm and the annular radiator; a first notch is provided at the connection between the first radiating arm and the first connecting portion, the first notch is connected to the first gap and is located between the first gap and the first connecting portion, and the width of the first notch is greater than the width of the first gap, so that the edge of the first radiating arm toward the annular radiator is in a zigzag shape, and the gap between the first radiating arm and the annular radiator also extends in a zigzag shape; The second sheet of the second radiating arm is connected to the second connecting portion through the corresponding first sheet, and a second gap is formed between the first sheet of the second radiating arm and the annular radiator; a second notch is provided at the connection between the second radiating arm and the second connecting portion, the second notch is connected to the second gap and is located between the second gap and the second connecting portion, and the width of the second notch is greater than the width of the second gap, so that the edge of the second radiating arm toward the annular radiator is in a zigzag shape, and the gap between the second radiating arm and the annular radiator also extends in a zigzag shape.

2. The antenna according to claim 1, characterized in that The first radiating arm and the second radiating arm are symmetrically arranged with respect to the opening.

3. The antenna according to claim 1, characterized in that The width of the second sheet is greater than the width of the first sheet.

4. The antenna according to claim 3, characterized in that: The first sheet of the first radiation arm and the first sheet of the second radiation arm are extended in a straight line.

5. The antenna according to claim 1, characterized in that The annular radiator defines a hollow portion, the hollow portion is communicated with the opening, and the hollow portion is extended in a straight line.

6. The antenna according to claim 1, characterized in that The first radiating arm has a first side facing away from the second radiating arm, the second radiating arm has a second side facing away from the first radiating arm, a first distance L1 is defined between the first side and the second side, and the first distance L1 is greater than or equal to 39.0 mm and less than or equal to 43 mm.

7. The antenna according to claim 6, characterized in that The annular radiator includes a first radiating edge and a second radiating edge opposite to each other, the opening passes through the first radiating edge, the first radiating arm has a third side away from the first radiating edge, the second radiating arm has a fourth side away from the first radiating edge, a second spacing L2 is provided between the third side and the second radiating edge, and a third spacing L3 is provided between the fourth side and the second radiating edge, wherein the second spacing L2 and the third spacing L3 are greater than or equal to 9.0 mm and less than or equal to 9.4 mm.

8. A wireless communication device, characterized in that: The wireless communication device comprises a feeder and an antenna as claimed in any one of claims 1 to 7, wherein the feeder has a ground layer and a core electrically isolated from each other, the ground layer is connected to the ground potential, and the core is connected to the feed potential.

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