Ultra-wideband antenna and communication device

Abstract

The application provides an ultra-wideband antenna and a communication device, the ultra-wideband antenna comprising: a first antenna provided with a first feed-in point; a second antenna provided with a second feed-in point near the position of the first feed-in point; and a filter unit comprising a first coupling section, a resonant section connected with the first coupling section, and a loop section connecting the first feed-in point and the resonant section, the first coupling section being used for coupling the first feed-in point and the second feed-in point, and the first feed-in point and the second feed-in point being respectively located on opposite sides of the first coupling section along the width direction. The ultra-wideband antenna and the communication device provided by the application are beneficial to restraining the signal current at the rated frequency point on the signal wall from flowing, preventing the signal current at the rated frequency point from flowing to the end of the resonant section to generate radiation, reducing the interference between the first feed-in point and the second feed-in point, and thus being beneficial to improving the antenna isolation.

Description

Technical Field

[0001] This application belongs to the field of antenna technology, and more specifically, relates to an ultra-wideband antenna and communication device. Background Technology

[0002] With the rapid development of short-range wireless communication network technology, the penetration rate of various mobile terminal devices is increasing very quickly. Wi-Fi networks and 5G networks have gained tremendous development space, bringing abundant network information resources to ultra-broadband backbone networks.

[0003] WiFi 6E and WiFi 7 technologies employ ultra-high-speed, ultra-wideband communication technology. This technology utilizes the combined use of ultra-wideband frequency range and ultra-fast channel technology to easily achieve operating speeds exceeding 1200Mbps on a single channel. However, its development also faces challenges. Because the low-frequency channel (5.9125GHz) of WiFi 6E / WiFi 7 differs from the high-frequency channel (5.8125GHz) of WiFi 6 by only 100MHz, the isolation bandwidth is extremely narrow, resulting in very poor isolation. This easily leads to strong interference between the lowest channel of WiFi 6E / WiFi 7 and the highest channel of WiFi 6, directly affecting the normal operation of both frequency bands. Summary of the Invention

[0004] The purpose of this application is to provide an ultra-wideband antenna to solve the technical problem of poor antenna isolation in the prior art.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide an ultra-wideband antenna, comprising:

[0006] The first antenna has a first feed point;

[0007] A second antenna is provided with a second feed point located near the first feed point;

[0008] The filtering unit includes a first coupling section, a resonant section connected to the first coupling section, and a loop section connecting the first feed point and the resonant section. The first coupling section is used to couple the first feed point and the second feed point. The first feed point and the second feed point are located on opposite sides of the first coupling section along the width direction.

[0009] By coupling the first coupling segment with the first feed point and the second feed point, a strong coupling current is obtained between the two signal lines above and below the signal feed point. This coupling current flows through the resonant segment, which helps to suppress the signal current at the rated frequency point on the signal wall, prevents the signal current at the rated frequency point from flowing to the end of the resonant section and generating radiation, and reduces the interference between the first feed point and the second feed point, thereby improving the antenna isolation.

[0010] In one embodiment, the first antenna is located at one end of the first coupling segment, and the second antenna is located at the other end of the first coupling segment;

[0011] The resonant segment includes a second coupling segment coupled to the second antenna and a third coupling segment coupled to the first feed point, wherein the second coupling segment and the third coupling segment are connected to the end of the first coupling segment away from the first antenna;

[0012] The loop segment includes a first branch and a second branch. The first branch connects the second coupling segment to the end of the first feed point away from the second feed point, and the second branch connects the third coupling segment to the end of the first feed point away from the second feed point.

[0013] By employing the aforementioned technical means, the second coupling segment can be coupled to the side of the second antenna closest to the second coupling segment, and the third coupling segment can be coupled to the side of the first feed point closest to the third coupling segment. This can effectively suppress the flow of signal current at the rated frequency point on these signal walls, further improving the filtering effect and increasing the isolation.

[0014] In one embodiment, the second coupling segment has a multi-segment polygonal structure, the multi-segment polygonal structure extending along the length direction of the first coupling segment; and / or,

[0015] The third coupling segment is arranged along the width direction of the first coupling segment.

[0016] By employing the above-mentioned technical means, the filtering effect can be improved and the isolation can be increased.

[0017] In one embodiment, the second coupling segment extends away from the first coupling segment in a direction opposite to the second antenna; the first segment includes a first straight segment connected to the second coupling segment and a second straight segment connecting the first straight segment and the first feed point, the first straight segment being arranged along the length direction of the first coupling segment and the second straight segment being arranged along the width direction of the first coupling segment.

[0018] By adopting the above-mentioned technical means, space can be saved and the design can be simplified.

[0019] In one embodiment, the first antenna includes a first low-frequency resonant node and a first high-frequency resonant node, which are connected to the first feed point; the first low-frequency resonant node forms a first semi-enclosed structure, with the opening of the first semi-enclosed structure facing the second antenna; the first high-frequency resonant node is located inside the first semi-enclosed structure, and the first high-frequency resonant node forms a second semi-enclosed structure, with the opening of the second semi-enclosed structure facing the direction away from the first feed point.

[0020] By employing the aforementioned technical means, the area occupied by the first antenna can be reduced, thus forming open radiation.

[0021] In one embodiment, the first low-frequency resonator includes a first low-frequency segment, a second low-frequency segment, and a third low-frequency segment connected in sequence, wherein the first low-frequency segment is connected to the first feed point; and / or,

[0022] The first high-frequency resonant section includes a first high-frequency segment, a second high-frequency segment, and a third high-frequency segment connected in sequence. The first high-frequency segment is connected to the first feed point. The width of the third high-frequency segment gradually increases from the end closer to the second high-frequency segment to the end farther away from the second high-frequency segment.

[0023] By employing the aforementioned technical means, open radiation can be formed, resulting in a strong coupling effect at close range.

[0024] In one embodiment, the second antenna includes a second low-frequency resonant node and a second high-frequency resonant node, which are connected to the second feed point; the second low-frequency resonant node forms a third semi-enclosed structure, the opening of which faces the first antenna; the second high-frequency resonant node is located inside the third semi-enclosed structure and forms a fourth semi-enclosed structure, the opening of which faces the first feed point away from the second feed point.

[0025] By employing the aforementioned technical means, the area occupied by the second antenna can be reduced, thus creating an open radiation system.

[0026] In one embodiment, the second low-frequency resonator includes a fourth low-frequency band, a fifth low-frequency band, and a sixth low-frequency band connected in sequence, wherein the fourth low-frequency band is connected to the second feed point; and / or,

[0027] The second high-frequency resonator includes a fourth high-frequency band, a fifth high-frequency band, and a sixth high-frequency band connected in sequence. The fourth high-frequency band is connected to the second feed point. The width of the sixth high-frequency band gradually increases from the end closer to the fifth high-frequency band to the end farther away from the fifth high-frequency band.

[0028] By employing the aforementioned technical means, open radiation can be formed, resulting in a strong coupling effect at close range.

[0029] In one embodiment, the second antenna has an extension arm on the side away from the first antenna, the extension arm extending toward the side closer to the resonant segment and coupled to the resonant segment.

[0030] By employing the above-mentioned technical means, the coupling effect can be improved and the isolation can be increased.

[0031] This application also provides a communication device, including a host and the ultra-wideband antenna described in any of the above embodiments.

[0032] By employing the above-mentioned technical means, the area occupied by the antenna can be reduced, the antenna isolation can be improved, and the communication quality can be enhanced. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a dipole antenna in the prior art;

[0035] Figure 2 for Figure 1 The graph shown is a curve of the dipole antenna at the rated frequency.

[0036] Figure 3 This is a schematic diagram of the structure of an ultra-wideband antenna provided in an embodiment of this application;

[0037] Figure 4 for Figure 3 A schematic diagram of the structure of the first antenna in the middle;

[0038] Figure 5 for Figure 3 A schematic diagram of the structure of the second-stage tandem.

[0039] Figure 6 for Figure 3 A schematic diagram of the structure of the intermediate filtering unit;

[0040] Figure 7 This is a curve of Comparative Example 1 at the rated frequency.

[0041] Figure 8 This is a graph of the embodiment of this application at the rated frequency.

[0042] The following are the labeling elements in the figure:

[0043] 100-Ultra-wideband antenna;

[0044] 10-First antenna; 11-First feed point; 12-First low-frequency resonator; 120-First semi-enclosed structure; 121-First low-frequency band; 122-Second low-frequency band; 123-Third low-frequency band; 13-First high-frequency resonator; 130-Second semi-enclosed structure; 131-First high-frequency band; 132-Second high-frequency band; 133-Third high-frequency band; 14-Connecting arm;

[0045] 20 - Second antenna; 21 - Second feed point; 22 - Second low-frequency resonator; 220 - Third semi-enclosed structure; 221 - Fourth low-frequency band; 222 - Fifth low-frequency band; 223 - Sixth low-frequency band; 23 - Second high-frequency resonator; 230 - Fourth semi-enclosed structure; 231 - Fourth high-frequency band; 232 - Fifth high-frequency band; 233 - Sixth high-frequency band; 24 - Extension arm;

[0046] 30 - Filtering unit; 31 - First coupling segment; 32 - Resonant segment; 321 - Second coupling segment; 3210 - Multi-segment broken line structure; 322 - Third coupling segment; 33 - Loop segment; 331 - First branch segment; 3311 - First straight segment; 3312 - Second straight segment; 332 - Second branch segment. Detailed Implementation

[0047] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0048] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0049] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] Please see Figure 1 The diagram shows a conventional single-unit dipole antenna, which includes a signal feed point 30', a first antenna resonator 10', and a second antenna resonator 20'. By corresponding to one-quarter of the length of a specific signal wavelength, it can achieve the effect of resonantly radiating electromagnetic waves. Please refer to [link / reference]. Figure 2 As shown, the isolation produced by the 100MHz (5.8125GHz-5.9125GHz) bandwidth of this dipole antenna is typically only about 2dB, which is a poor isolation effect.

[0052] To address this, the distance between the first antenna resonator 10' and the second antenna resonator 20' is usually increased. However, this increases the area occupied by the dipole antenna, as well as the product size and weight, which is not conducive to the miniaturization and weight reduction of the antenna and the product.

[0053] Based on this, this application provides an ultra-wideband antenna 100, which improves the isolation between the first antenna 10 and the second antenna 20 by setting a filter unit 30, thereby reducing the distance between the first antenna 10 and the second antenna 20 and reducing the area of ​​the ultra-wideband antenna 100 to meet the requirements of miniaturization and lightweighting of antennas and products.

[0054] Please refer to the following: Figures 4 to 6The ultra-wideband antenna 100 provided in the embodiments of this application will now be described. The ultra-wideband antenna 100 includes a first antenna 10, a second antenna 20, and a filtering unit 30; the first antenna 10 is provided with a first feed point 11; the second antenna 20 is provided with a second feed point 21, which is located near the first feed point 11 on the second antenna 20; the filtering unit 30 includes a first coupling section 31, a resonant section 32 connected to the first coupling section 31, and a loop section 33 connecting the first feed point 11 and the resonant section 32. The first coupling section 31 is used to couple the first feed point 11 and the second feed point 21. The first feed point 11 and the second feed point 21 are located on opposite sides of the first coupling section 31 along the width direction Y. By coupling the first coupling segment 31 with the first feed point 11 and the second feed point 21, a strong coupling current is obtained between the two signal lines above and below the signal feed point (i.e., the first feed point 11 and the second feed point 21). This coupling current flows through the resonant segment 32, which helps to suppress the signal current at the rated frequency point on the signal wall, prevents the signal current at the rated frequency point from flowing to the end of the resonant node and generating radiation, and reduces the interference between the first feed point 11 and the second feed point 21, thereby improving the antenna isolation.

[0055] In one embodiment of this application, please refer to Figures 3 to 6 The first antenna 10 is located at one end of the first coupling segment 31, and the second antenna 20 is located at the other end of the first coupling segment 31. The resonant segment 32 includes a second coupling segment 321 coupled to the second antenna 20 and a third coupling segment 322 coupled to the first feed point 11. The second coupling segment 321 and the third coupling segment 322 are connected to the end of the first coupling segment 31 away from the first antenna 10. The loop segment 33 includes a first branch segment 331 and a second branch segment 332. The first branch segment 331 connects the end of the second coupling segment 321 away from the first coupling segment 31 to the end of the first feed point 11 away from the second feed point 21. The second branch segment 332 connects the end of the third coupling segment 322 away from the first coupling segment 31 to the end of the first feed point 11 away from the second feed point 21. In this way, the second coupling segment 321 can be coupled to the side of the second antenna 20 near the second coupling segment 321, and the third coupling segment 322 can be coupled to the side of the first feed point 11 near the third coupling segment 322. This can effectively suppress the flow of signal current at the rated frequency point on these signal walls, further improve the filtering effect, and increase the isolation.

[0056] In one embodiment of this application, please refer to Figures 3 to 6 The second coupling segment 321 has a multi-segment broken-line structure 3210, which extends along the length direction X of the first coupling segment 31. Thus, the multi-segment broken-line structure 3210 forms a broken-line resonant filter, producing an ultra-wideband filtering effect.

[0057] Optionally, the multi-segment polygonal structure 3210 includes multiple vertical segments and multiple horizontal segments. Each vertical segment is arranged along the width direction Y of the first coupling segment 31, and the multiple vertical segments are arranged side-by-side along the length direction X of the first coupling segment 31. The multiple vertical segments and multiple horizontal segments are alternately connected at their ends. The first coupling segment 31 is connected to adjacent horizontal segments, and the vertical segment at the end furthest from the first coupling segment 31 is connected to the first branch segment 331. This achieves better ultra-wideband filtering performance and increases isolation.

[0058] In one embodiment of this application, please refer to Figures 3 to 6 The third coupling segment 322 is set along the width direction Y of the first coupling segment 31. This allows the third coupling segment 322 to have a larger coupling length with the first feed point 11, and reduces the width of the second antenna 20 occupied by the third coupling segment 322, thus ensuring the coupling length between the second coupling segment 321 and the second antenna 20.

[0059] In one embodiment of this application, please refer to Figures 3 to 6 The second coupling segment 321 extends away from the first coupling segment 31 in a direction opposite to the second antenna 20. The first branch segment 331 includes a first straight segment 3311 connected to the second coupling segment 321 and a second straight segment 3312 connecting the first straight segment 3311 and the first feed point 11. The first straight segment 3311 is arranged along the length direction X of the first coupling segment 31, and the second straight segment 3312 is arranged along the width direction Y of the first coupling segment 31. This creates a gap between the first straight segment 3311 and the second straight segment 3312 and the second coupling segment 321. By adjusting this gap, the equivalent capacitive reactance to ground can be obtained, allowing the gap size to be adjusted according to the required frequency. This facilitates gap adjustment to meet the isolation requirements of different frequencies, saves space, and simplifies the design.

[0060] In one embodiment of this application, please refer to Figures 3 to 6The first antenna 10 includes a first low-frequency resonator 12 and a first high-frequency resonator 13, which are connected to a first feed point 11. The first low-frequency resonator 12 forms a first semi-enclosed structure 120, with its opening facing the second antenna 20. The first high-frequency resonator 13 is located inside the first semi-enclosed structure 120 and forms a second semi-enclosed structure 130, with its opening facing away from the second feed point 21. This reduces the area occupied by the first antenna 10. The end of the first low-frequency resonator 12 forms a U-shaped opening with the first feed point 11, creating open radiation. The end of the first high-frequency resonator 13 also forms a U-shaped opening with the first feed point 11, creating open radiation. Furthermore, the close distance between the first low-frequency resonator 12 and the first high-frequency resonator 13 facilitates close-range coupling between them.

[0061] In one embodiment of this application, please refer to Figures 3 to 6 The first low-frequency resonator 12 includes a first low-frequency segment 121, a second low-frequency segment 122, and a third low-frequency segment 123 connected in sequence. The end of the first low-frequency segment 121 away from the second low-frequency segment 122 is connected to the first feed point 11. This forms a first semi-enclosed structure 120 opening towards the second antenna 20. Optionally, the first low-frequency segment 121 and the third low-frequency segment 123 are respectively arranged along the length direction X of the first coupling segment 31, and the first low-frequency segment 121 and the third low-frequency segment 123 are arranged side by side along the width direction Y of the first coupling segment 31, and the second low-frequency segment 122 is arranged along the width direction Y of the first coupling segment 31. In this way, the area occupied by the first semi-enclosed structure 120 can be reduced, while ensuring the length of the first low-frequency resonator 12.

[0062] In one embodiment of this application, please refer to Figures 3 to 6 The first high-frequency resonator 13 includes a first high-frequency segment 131, a second high-frequency segment 132, and a third high-frequency segment 133 connected in sequence. The end of the first high-frequency segment 131 away from the second high-frequency segment 132 is connected to the first feed point 11. This allows the opening of the second semi-enclosed structure 130 to face the first feed point 11 away from the second feed point 21. Optionally, the first high-frequency segment 131 and the third high-frequency segment 133 are respectively arranged along the width direction Y of the first coupling segment 31, and the first high-frequency segment 131 and the third high-frequency segment 133 are arranged side by side along the length direction X of the first coupling segment 31, while the second high-frequency segment 132 is arranged along the length direction X of the first coupling segment 31. In this way, the area occupied by the second semi-enclosed structure 130 can be reduced, while ensuring the length of the first high-frequency resonator 13.

[0063] Optionally, the width of the third high-frequency band 133 gradually increases from the end closer to the second high-frequency band 132 to the end farther away from the second high-frequency band 132. By increasing the width at the end of the first high-frequency resonator 13, a close-range strong coupling effect is formed with the middle section of the first low-frequency resonator 12, and the third high-frequency band 133 and the first feed point 11 are close to a closed loop.

[0064] In one embodiment of this application, please refer to Figures 3 to 6 The second antenna 20 includes a second low-frequency resonator 22 and a second high-frequency resonator 23, which are connected to the second feed point 21. The second low-frequency resonator 22 forms a third semi-enclosed structure 220, with its opening facing the first antenna 10. The second high-frequency resonator 23 is located inside the third semi-enclosed structure 220 and forms a fourth semi-enclosed structure 230, with its opening facing the first feed point 11 away from the second feed point 21. This reduces the area occupied by the second antenna 20. The end of the second low-frequency resonator 22 forms a U-shaped opening with the second feed point 21, creating open radiation. The end of the second high-frequency resonator 23 also forms a U-shaped opening with the second feed point 21, creating open radiation. Furthermore, the close proximity of the second low-frequency resonator 22 and the second high-frequency resonator 23 facilitates close-range coupling between them.

[0065] In one embodiment of this application, please refer to Figures 3 to 6 The second low-frequency resonator 22 includes a fourth low-frequency band 221, a fifth low-frequency band 222, and a sixth low-frequency band 223 connected in sequence. The end of the fourth low-frequency band 221 away from the fifth low-frequency band 222 is connected to the second feed point 21. This forms a third semi-enclosed structure 220 that opens towards the first antenna 10. Optionally, the fourth low-frequency band 221 and the sixth low-frequency band 223 are respectively arranged along the length direction X of the first coupling section 31, and the fourth low-frequency band 221 and the sixth low-frequency band 223 are arranged side by side along the width direction Y of the first coupling section 31, while the fifth low-frequency band 222 is arranged along the width direction Y of the first coupling section 31. In this way, the area occupied by the third semi-enclosed structure 220 can be reduced, while ensuring the length of the second low-frequency resonator 22.

[0066] In one embodiment of this application, please refer to Figures 3 to 6The second high-frequency resonator 23 includes a fourth high-frequency band 231, a fifth high-frequency band 232, and a sixth high-frequency band 233 connected in sequence. The end of the fourth high-frequency band 231 away from the fifth high-frequency band 232 is connected to the second feed point 21. The second feed point 21 can be located at the end where the fourth high-frequency band 231 is connected to the fourth low-frequency band 221, thus reducing the distance between the first high-frequency resonator 13 and the second high-frequency resonator 23 and improving the coupling effect. Optionally, the fourth high-frequency band 231 extends from the second feed point 21 in a direction away from the first feed point 11 in a direction away from the first antenna 10. The fifth high-frequency band 232 is arranged along the length direction X of the first coupling segment 31. The fifth high-frequency band 232 extends from the end of the fourth high-frequency band 231 away from the second feed point 21 in a direction away from the first antenna 10. The sixth high-frequency band 233 extends from the end of the fifth high-frequency band 232 away from the fourth high-frequency band 231 in a direction closer to the second feed point 21. In this way, the area occupied by the fourth semi-enclosed structure 230 can be reduced, while ensuring the length of the second high-frequency resonant section 23.

[0067] Optionally, the width of the sixth high-frequency band 233 gradually increases from the end closer to the fifth high-frequency band 232 to the end farther away from the fifth high-frequency band 232. By increasing the width of the end of the second high-frequency resonator 23, a close-range strong coupling effect is formed with the middle section of the second low-frequency resonator 22, and the sixth high-frequency band 233 and the second feed point 21 are close to a closed loop.

[0068] In one embodiment of this application, please refer to Figures 3 to 6 The second antenna 20 has an extension arm 24 on the side away from the first antenna 10. The extension arm 24 extends toward the side close to the resonant section 32 and is coupled to the resonant section 32.

[0069] Specifically, the extension arm 24 extends from the fifth low-frequency band 222 toward the side closer to the resonant band 32.

[0070] In one embodiment of this application, please refer to Figures 3 to 6 The first antenna 10 also includes a connecting arm 14, which connects the first high-frequency band 131 and the first low-frequency band 121. The first feed point 11 is located at the end of the connecting arm 14 away from the first high-frequency band 131 and the first low-frequency band 121. In this way, the connection between the first high-frequency resonator 13 and the first low-frequency resonator 12 and the first feed point 11 can be achieved.

[0071] Please see Figure 3This application also provides a communication device, including a host and the ultra-wideband antenna 100 described in any of the above embodiments. By using the ultra-wideband antenna 100 in the above embodiments, the area occupied by the ultra-wideband antenna 100 can be reduced, and the isolation between the first antenna 10 and the second antenna 20 can be improved. The communication device can be a terminal device such as a mobile phone, tablet computer, POS machine, router, or IoT device.

[0072] Comparative Example 1 includes the structures of the first antenna 10 and the second antenna 20 in the embodiments of this application, but does not include the filter unit 30. The first antenna 10 and the second antenna 20 use multi-resonant dipole oscillators. The first low-frequency resonant section 12 and the second low-frequency resonant section 22 are symmetrically extended to the left and right sides, respectively. The first high-frequency resonant section 13 and the second high-frequency resonant section 23 are symmetrically extended to the left and right sides, forming open radiation. The width at the end is increased, forming a close-range strong coupling effect on the middle section of the low-frequency resonant section. The end and the feed point are close to a closed ring. The length of the two pairs of resonant sections is calculated from the signal feed point to the end of the resonant section. The length is calculated using the formula 0.2λ (λ=C / f=L(10) or L(20), where C is the speed of light in free space and f is the antenna operating frequency). The two pairs of resonant sections resonate at frequency points f1 and f2, respectively. At the same time, the different resonant frequencies generated by the multiple couplings of different intensities between the low-frequency resonant section and the high-frequency resonant section form multiple frequency point resonance curves between f1 and f2. Finally, Figure 7 The graph shows that the isolation between 5.8125 GHz and 5.9125 GHz is only 3.5 dB.

[0073] In this embodiment, the filter unit 30 adopts the principle of a piecewise linear resonator filter. A first coupling segment 31 extends from the gap between the first feed point 11 and the second feed point 21. The first coupling segment 31 obtains a strong coupling current from the first feed point 11 and the second feed point 21. This coupling current enters and flows through the entire piecewise linear cavity and forms coupling with the fourth low-frequency segment 221, the extension arm 24 and the three sides of the resonator, which can effectively suppress the flow of signal current at the rated frequency point on these signal walls and prevent the signal current at the rated frequency point from flowing to the end of the resonator and generating radiation.

[0074] The filtering unit 30 inputs the signal coupled from the first feed point 11 and the second feed point 21 through the first coupling section 31 into the piecewise linear cavity, thereby achieving an ultra-wideband filtering effect. The length of the first coupling section 31 between the first feed point 11 and the second feed point 21 determines the strength of the coupled signal, and then the coupled signal is introduced into the second coupling section 321.

[0075] The multi-segment polygonal structure 3210 has multiple polygonal segments connected in series at close range to form two frequencies ω1 and ω2. These two frequencies are at 5.9125GHz and the highest frequency of WIFI6E / WIFI7 at 7.125GHz. The filtering effect and antenna isolation can be adjusted by adjusting the distance between the polygonal segments inside the second coupling segment 321.

[0076] Figure 8 The graph shows the antenna structure in the embodiment of this application, which produces an isolation of approximately 6.5 dB in a 100 MHz frequency interval between 5.9125 GHz and 5.8125 GHz.

[0077] The ultra-wideband antenna 100 in this application is applicable to the WIFI6 / WIFI6E / WIFI7 frequency bands, but is not limited to these frequencies. The antenna can be fabricated as a standalone antenna using a circuit board, or it can be made using metal materials, or it can be integrated onto the circuit board of the host device using a printed method, thereby improving the portability and ease of use of the entire communication device.

[0078] By adjusting the internal spacing of the second coupling section 321 and the gap between the second coupling section 321 and the loop section 33, the edge of the entire filter unit 30 is coupled with the fourth low-frequency band 221 and the extension arm 24 to absorb the signal current at the rated frequency point on the resonant joint into the filter unit 30. Finally, the absorbed signal current returns to the first antenna 10 through the loop section 33, thus forming a filtering effect at the rated frequency point.

[0079] This application provides an embodiment of a multi-resonator ultra-wideband filter antenna, which is a structure that can flexibly achieve strong signal filtering within a rated frequency range. Based on the multi-resonator ultra-wideband antenna, a resonant filter is added at the signal feed point to achieve filtering within the rated frequency range.

[0080] The antenna structure disclosed in this application is a multi-resonant-node ultra-wideband filter antenna, which includes a multi-resonant-node ultra-wideband antenna and an ultra-wideband resonant filter. The input coupling current is formed at the antenna signal feed point based on the principle of resonator filter, and the resonant filter is used to filter out signals in the rated frequency range of the antenna, thereby achieving a strong suppression effect on the rated frequency signal.

[0081] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An ultra-wideband antenna, characterized by, include: The first antenna has a first feed point; A second antenna is provided with a second feed point located near the first feed point; The filtering unit includes a first coupling section, a resonant section connected to the first coupling section, and a loop section connecting the first feed point and the resonant section. The first coupling section is used to couple the first feed point and the second feed point to obtain a coupling current and guide it into the resonant section. The resonant section is used to suppress the flow of signal current at the rated frequency point. The loop section is used to allow the absorbed signal current to flow back to the first antenna. The first feed point and the second feed point are located on opposite sides of the first coupling section along the width direction.

2. The ultra-wideband antenna of Claim 1, wherein: The first antenna is located at one end of the first coupling segment, and the second antenna is located at the other end of the first coupling segment; The resonant segment includes a second coupling segment coupled to the second antenna and a third coupling segment coupled to the first feed point, wherein the second coupling segment and the third coupling segment are connected to the end of the first coupling segment away from the first antenna; The loop segment includes a first branch and a second branch. The first branch connects the second coupling segment to the end of the first feed point away from the second feed point, and the second branch connects the third coupling segment to the end of the first feed point away from the second feed point.

3. The ultra-wideband antenna as described in claim 2, characterized in that: The second coupling segment has a multi-segment polygonal structure, which extends along the length direction of the first coupling segment; and / or, The third coupling segment is arranged along the width direction of the first coupling segment.

4. The ultra-wideband antenna as described in claim 2, characterized in that: The second coupling segment extends away from the first coupling segment in a direction away from the second antenna; the first branch includes a first straight segment connected to the second coupling segment and a second straight segment connecting the first straight segment and the first feed point, the first straight segment being arranged along the length direction of the first coupling segment and the second straight segment being arranged along the width direction of the first coupling segment.

5. The ultra-wideband antenna as described in claim 2, characterized in that: The first antenna includes a first low-frequency resonant node and a first high-frequency resonant node, which are connected to the first feed point. The first low-frequency resonant node forms a first semi-closed structure, with the opening of the first semi-closed structure facing the second antenna. The first high-frequency resonant node is located inside the first semi-closed structure and forms a second semi-closed structure, with the opening of the second semi-closed structure facing away from the first feed point.

6. The ultra-wideband antenna as described in claim 5, characterized in that: The first low-frequency resonant section includes a first low-frequency band, a second low-frequency band, and a third low-frequency band connected in sequence, wherein the first low-frequency band is connected to the first feed point; and / or, The first high-frequency resonant section includes a first high-frequency segment, a second high-frequency segment, and a third high-frequency segment connected in sequence. The first high-frequency segment is connected to the first feed point. The width of the third high-frequency segment gradually increases from the end closer to the second high-frequency segment to the end farther away from the second high-frequency segment.

7. The ultra-wideband antenna as described in claim 2, characterized in that: The second antenna includes a second low-frequency resonant node and a second high-frequency resonant node, which are connected to the second feed point. The second low-frequency resonant node forms a third semi-enclosed structure, with the opening of the third semi-enclosed structure facing the first antenna. The second high-frequency resonant node is located inside the third semi-enclosed structure and forms a fourth semi-enclosed structure, with the opening of the fourth semi-enclosed structure facing the first feed point away from the second feed point.

8. The ultra-wideband antenna as described in claim 7, characterized in that: The second low-frequency resonator includes a fourth low-frequency band, a fifth low-frequency band, and a sixth low-frequency band connected in sequence, wherein the fourth low-frequency band is connected to the second feed point; and / or, The second high-frequency resonator includes a fourth high-frequency band, a fifth high-frequency band, and a sixth high-frequency band connected in sequence. The fourth high-frequency band is connected to the second feed point. The width of the sixth high-frequency band gradually increases from the end closer to the fifth high-frequency band to the end farther away from the fifth high-frequency band.

9. The ultra-wideband antenna as described in any one of claims 1 to 8, characterized in that: The second antenna has an extension arm on the side away from the first antenna, the extension arm extends toward the side close to the resonant segment and is coupled to the resonant segment.

10. A communication device, comprising a host, characterized in that: It also includes the ultra-wideband antenna as described in any one of claims 1 to 9.

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