Multi-feed antenna

Abstract

This invention proposes a multi-feed antenna comprising a first conductor layer, a second conductor layer, four supporting conductor structures, and four feed conductor lines. The second conductor layer has a first center position. A first spacing exists between the second conductor layer and the first conductor layer. Each of the four supporting conductor structures is electrically connected to both the first and second conductor layers, forming four electrical connection regions on the second conductor layer. Each of the four electrical connection regions extends from a different edge of the second conductor layer towards the first center position, such that the second conductor layer forms four interconnected radiating conductor plates. The four feed conductor lines are all located between the first and second conductor layers. The four feed conductor lines and the four supporting conductor structures form an alternating loop arrangement. The four feed conductor lines excite at least four resonant modes in the second conductor layer. The at least four resonant modes cover at least one identical first communication frequency band.

Description

Technical Field

[0001] This invention relates to a multi-feed antenna design, and more particularly to a multi-feed antenna design architecture that can achieve multi-antenna integration. Background Technology

[0002] To improve wireless communication quality and data transmission rates, the application of pattern-variable multi-antenna array architectures and multi-input multi-output (MIMO) multi-antenna architectures has become widespread. Antenna design with the advantages of multi-antenna element integration has become a hot research topic. However, multiple adjacent antennas operating in the same frequency band may experience mutual coupling interference and interference from the surrounding environment, potentially leading to poor isolation between antennas and attenuation of antenna radiation characteristics. This results in a decrease in data transmission speed and increases the difficulty of implementing multi-antenna integration. Therefore, successfully designing broadband antenna elements into highly integrated multi-antenna arrays while simultaneously achieving good matching and good isolation remains a significant technical challenge.

[0003] Some existing technical literature has proposed designing periodic structures as energy isolators on the ground between multiple antennas to improve energy isolation and immunity to interference from the surrounding environment. However, this design method may introduce instability in the manufacturing process, potentially increasing mass production costs. It may also induce additional coupling currents, leading to an increase in the correlation coefficient between multiple antennas. Furthermore, it may increase the overall size of the multi-antenna array, making it less suitable for implementation in various wireless devices or equipment.

[0004] Therefore, a design approach is needed to solve these problems in order to meet the practical application needs of future high-speed data transmission communication devices or equipment. Summary of the Invention

[0005] In view of this, an embodiment of the present invention discloses a multi-feed antenna. Some practical examples of the embodiment can solve the aforementioned technical problems.

[0006] According to one embodiment, the present invention provides a multi-feed antenna. The multi-feed antenna includes a first conductor layer, a second conductor layer, four supporting conductor structures, and four feed conductor lines. The second conductor layer has a first center position, and a first spacing exists between the second conductor layer and the first conductor layer. The four supporting conductor structures are all located between the first conductor layer and the second conductor layer, and each is electrically connected to both the first and second conductor layers. The four supporting conductor structures form four electrically connected regions on the second conductor layer, and each of the four electrically connected regions extends from a different edge of the second conductor layer towards the first center position, such that the second conductor layer forms four interconnected radiating conductor plates. The four feed conductor lines are all located between the first conductor layer and the second conductor layer, and the four feed conductor lines and the four supporting conductor structures form an alternating loop arrangement.

[0007] Each of the feed conductor lines has an electrical connection point at one end electrically connected to a coupling conductor sheet, and each of the coupling conductor sheets has a coupling gap with a different radiating conductor sheet. Each of the feed conductor lines also has an electrical connection at the other end to a signal source. The four feed conductor lines excite the second conductor layer to generate at least four resonant modes, the at least four resonant modes covering at least one identical first communication frequency band.

[0008] To provide a better understanding of the above and other aspects of this case, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0009] Figure 1A This is a structural diagram of a multi-feed antenna 1 according to an embodiment of the present invention;

[0010] Figure 1B This is a structural diagram of a closed region formed by connecting the four electrical connection points of the four coupling conductor sheets of a multi-feed antenna 1 according to an embodiment of the present invention.

[0011] Figure 1C This is a return loss curve of a multi-feed antenna 1 according to an embodiment of the present invention;

[0012] Figure 1D This is an isolation curve of a multi-feed antenna 1 according to an embodiment of the present invention;

[0013] Figure 1E This is a radiation efficiency curve of a multi-feed antenna 1 according to an embodiment of the present invention;

[0014] Figure 2A This is a structural diagram of a multi-feed antenna 2 according to an embodiment of the present invention;

[0015] Figure 2BThis is a structural diagram of a closed region formed by connecting the four electrical connection points of the four coupling conductor sheets of a multi-feed antenna 2 according to an embodiment of the present invention.

[0016] Figure 2C This is a return loss curve of a multi-feed antenna 2 according to an embodiment of the present invention;

[0017] Figure 2D This is an isolation curve of a multi-feed antenna 2 according to an embodiment of the present invention;

[0018] Figure 2E This is a radiation efficiency curve of a multi-feed antenna 2 according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures

[0020] 1, 2: Multi-feed antenna

[0021] 11, 21: First conductor layer

[0022] 12, 22: Second conductor layer

[0023] 121, 221: First central location

[0024] 131, 132, 133, 134, 231, 232, 233, 234: Supporting conductor structure

[0025] 1311, 1321, 1331, 1341, 2311, 2321, 2331, 2341: Electrical connection areas

[0026] 1211, 1212, 1213, 1214, 2211, 2212, 2213, 2214: Different edges of the second conductor layer

[0027] 22121, 22141: Slot structure

[0028] 122, 123, 124, 125, 222, 223, 224, 225: Radiation conductor plates

[0029] 141, 142, 143, 144, 241, 242, 243, 244: Feed conductor lines

[0030] 1411, 1421, 1431, 1441, 2411, 2421, 2431, 2441: Coupled conductor sheets

[0031] 14111, 14211, 14311, 14411, 24111, 24211, 24311, 24411: Electrical connection points

[0032] 1412, 1422, 1432, 1442, 2412, 2422, 2432, 2442: Signal source

[0033] 14121, 14221, 14321, 14421, 24121, 24221, 24321, 24421: Resonance modes

[0034] 141222, 141232, 141242, 241222, 241232, 241242: Isolation curves

[0035] 14122, 14222, 24122, 24222: Radiation efficiency curves

[0036] 15, 25: First communication frequency band

[0037] 161, 162, 163, 164, 261, 262, 263, 264: Resonance Space

[0038] 17, 27: Enclosed areas

[0039] d1: First spacing

[0040] s1: Coupling spacing

[0041] s2: Coupling spacing

[0042] s3: Coupling spacing

[0043] s4: Coupling spacing Detailed Implementation

[0044] Figure 1A This is a structural diagram of a multi-feed antenna 1 according to an embodiment of the present invention. Figure 1AAs shown, the multi-feed antenna 1 includes a first conductor layer 11, a second conductor layer 12, four supporting conductor structures 131, 132, 133, and 134, and four feed conductor lines 141, 142, 143, and 144. The second conductor layer 12 has a first center position 121, and there is a first spacing d1 between the second conductor layer 11 and the first conductor layer 12. The four supporting conductor structures 131, 132, 133, and 134 are all located between the first conductor layer 11 and the second conductor layer 12, and are each electrically connected to the first conductor layer 11 and the second conductor layer 12. The four supporting conductor structures 131, 132, 133, and 134 form four electrically connected regions 1311, 1321, 1331, and 1341 on the second conductor layer 12. Furthermore, the four electrical connection regions 1311, 1321, 1331, and 1341 each extend from different edges 1211, 1212, 1213, and 1214 of the second conductor layer 12 towards the first center position 121, thereby forming four interconnected radiating conductor plates 122, 123, 124, and 125 in the second conductor layer 12. The supporting conductor structures 131, 132, 133, and 134 are composed of multiple conductor lines. The four feed conductor lines 141, 142, 143, and 144 are all located between the first conductor layer 11 and the second conductor layer 12. The four feed conductor lines 141, 142, 143, and 144, along with the four supporting conductor structures 131, 132, 133, and 134, form an alternating ring arrangement between the first conductor layer 11 and the second conductor layer 12. Each of the aforementioned feed conductor lines 141, 142, 143, and 144 has an electrical connection point 14111, 14211, 14311, and 14411 (e.g., one end of which is electrically connected to a coupling conductor piece 1411, 1421, 1431, and 1441) that is electrically connected to a coupling conductor piece 1411, 1421, 1431, and 1441. Figure 1B (As shown). Each of the coupling conductor sheets 1411, 1421, 1431, 1441 has a coupling distance s1, s2, s3, s4 between itself and one of the different radiating conductor plates 122, 123, 124, 125. Each of the feed conductor lines 141, 142, 143, 144 has another end electrically connected to a signal source 1412, 1422, 1432, 1442. The four feed conductor lines 141, 142, 143, 144 excite the second conductor layer 12 to generate at least four resonant modes 14121, 14221, 14321, 14421 (e.g., ...). Figure 1CAs shown, the at least four resonant modes 14121, 14221, 14321, and 14421 cover at least one identical first communication frequency band 15. The coupling conductor sheets 1411, 1421, 1431, and 1441 are located in a common plane with the second conductor layer 12. The coupling spacings s1, s2, s3, and s4 are between 0.005 and 0.088 wavelengths of the lowest operating frequency of the first communication frequency band 15. The four supporting conductor structures 131, 132, 133, and 134 form four different resonant spaces 161, 162, 163, and 164 between the first conductor layer 11 and the second conductor layer 12, and the four feed conductor lines 141, 142, 143, and 144 are located in different resonant spaces 161, 162, 163, and 164, respectively. The distance of the first spacing d1 is between 0.01 wavelength and 0.38 wavelengths of the lowest operating frequency of the first communication band 15. The area of ​​the second conductor layer 12 is between 0.25 wavelength squared and 0.99 wavelength squared of the lowest operating frequency of the first communication band 15. Figure 1A This diagram illustrates the structure of a closed region 17 formed by the lines connecting the four electrical connection points 14111, 14211, 14311, and 14411 of the four coupling conductor sheets 1411, 1421, 1431, and 14411 of a multi-feed antenna 1 according to an embodiment of the present invention. The lines connecting the four electrical connection points 14111, 14211, 14311, and 14411 form a closed region 17, the area of ​​which is between 0.1 wavelength squared and 0.49 wavelength squared of the lowest operating frequency of the first communication frequency band 15. The area of ​​the closed region 17 is smaller than the area of ​​the second conductor layer 12. The first conductor layer 11 and the second conductor layer 12 can also be implemented on a single-layer or multi-layer dielectric substrate. In one embodiment of the present invention, the second conductor layer 12 of the multi-feed antenna 1 is circular in shape, but its shape can also be square, rectangular, elliptical, rhomboid, polygonal, or other irregular shapes or combinations of slot shapes. The signal sources 1412, 1422, 1432, and 1442 are transmission lines, impedance matching circuits, amplifier circuits, feed networks, switching circuits, connector components, filter circuits, integrated circuit chips, or RF front-end modules. The multi-feed antenna 1 can be configured as a single set or multiple sets for use in multi-input multi-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems.

[0045] Figure 1AIn one embodiment of the present invention, a multi-feed antenna 1 is designed to form four electrically connected regions 1311, 1321, 1331, and 1341 on the second conductor layer 12 by designing four supporting conductor structures 131, 132, 133, and 134. Furthermore, the four electrically connected regions 1311, 1321, 1331, and 1341 extend from different edges 1211, 1212, 1213, and 1214 of the second conductor layer 12 towards the first center position 121, thereby forming four interconnected radiating conductor plates 122, 123, 124, and 125 on the second conductor layer 12. This successfully achieves the multi-antenna miniaturization effect of the coexistence exciter of the four resonant modes 14121, 14221, 14321, and 14421 (e.g., Figure 1C (As shown). The multi-feed antenna 1 also designs the four feed conductor lines 141, 142, 143, 144 and the four supporting conductor structures 131, 132, 133, 134 to form an alternating ring arrangement between the first conductor layer 11 and the second conductor layer 12. Furthermore, the four supporting conductor structures 131, 132, 133, 134 are designed so that the region between the first conductor layer 11 and the second conductor layer 12 forms four different resonance spaces 161, 162, 163, 164, and the four feed conductor lines 141, 142, 143, 144 are respectively located in different resonance spaces 161, 162, 163, 164. This successfully achieves a good degree of energy isolation for the four resonance modes 14121, 14221, 14321, 14421 (e.g., ...). Figure 1D (As shown). The multi-feed antenna 1 is designed with coupling spacings s1, s2, s3, and s4 between each of the coupling conductor plates 1411, 1421, 1431, and 1441 and one of the different radiating conductor plates 122, 123, 124, and 125. The coupling spacings s1, s2, s3, and s4 are designed to be between 0.005 wavelengths and 0.088 wavelengths from the lowest operating frequency of the first communication band 15. This successfully achieves good impedance matching for the four resonant modes 14121, 14221, 14321, and 14421 (e.g., as shown). Figure 1C(As shown). The multi-feed antenna 1 is designed such that the distance of the first spacing d1 is between 0.01 wavelength and 0.38 wavelengths of the lowest operating frequency of the first communication band 15, and the area of ​​the second conductor layer 12 is between 0.25 wavelength squared and 0.99 wavelength squared of the lowest operating frequency of the first communication band 15. Furthermore, the connection lines of the four electrical connection points 14111, 14211, 14311, and 14411 of the four coupling conductor sheets 1411, 1421, 1431, and 14411 form a closed region 17, the area of ​​which is between 0.1 wavelength squared and 0.49 wavelength squared of the lowest operating frequency of the first communication band 15, and the area of ​​the closed region 17 is smaller than the area of ​​the second conductor layer 12. This successfully excites the multi-feed antenna 1 to produce good radiation efficiency characteristics (e.g., Figure 1E (As shown). The multi-feed antenna 1 can be configured as a single set or multiple sets for use in multiple-input multiple-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems. Therefore, an embodiment of the multi-feed antenna 1 of the present invention can successfully achieve the technical effect of multi-antenna compatible integration.

[0046] Figure 1C This is a return loss curve of a multi-feed antenna 1 according to an embodiment of the present invention. The following dimensions were selected for the experiment: the distance of the first spacing d1 is approximately 11 mm; the area of ​​the second conductor layer 12 is approximately 2500 mm². 2 The area of ​​the enclosed region 17 is approximately 733 mm². 2 The coupling spacings s1, s2, s3, and s4 are all approximately 2 mm apart. Figure 1C As shown, the signal sources 1412, 1422, 1432, and 1442 excite the multi-feed antenna 1 to generate four well-matched resonant modes 14121, 14221, 14321, and 14421. These four resonant modes 14121, 14221, 14321, and 14421 cover at least one first communication frequency band 15. In this embodiment, the frequency range of the first communication frequency band 15 is 3300MHz to 5000MHz, and the lowest operating frequency of the first communication frequency band 15 is 3300MHz. Figure 1D This is an isolation curve diagram of a multi-feed antenna 1 according to an embodiment of the present invention. As shown in Figure 1D, the isolation curve between signal source 1412 and signal source 1422 is 141222, the isolation curve between signal source 1412 and signal source 1442 is 141242, and the isolation curve between signal source 1412 and signal source 1432 is 141232. Figure 1DAs shown, the multi-feed signal source 1412 of the multi-feed antenna 1 can achieve good isolation from the signal source 1422, the signal source 1432, and the signal source 1442. Figure 1E This is a radiation efficiency curve of a multi-feed antenna 1 according to an embodiment of the present invention. Figure 1E As shown, the resonant modes 14121 and 14221 excited by the two adjacent signal sources 1412 and 1422 both have good radiation efficiencies 14122 and 14222. The two adjacent signal sources 1432 and 1442 are roughly symmetrical to the signal sources 1412 and 1422, and the resonant modes 14321 and 14421 can also achieve good radiation efficiency characteristics.

[0047] Figure 1C , Figure 1D , Figure 1E The communication frequency band operations and experimental data covered are only for experimental demonstration purposes. Figure 1A The technical efficacy of the multi-feed antenna 1 according to an embodiment of the present invention is not intended to limit the communication frequency band operation, application, and specifications that the multi-feed antenna 1 of the present invention can cover in practical applications. The multi-feed antenna 1 can be configured as a single set or multiple sets for use in multiple-input multiple-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems.

[0048] Figure 2A This is a structural diagram of a multi-feed antenna 2 according to an embodiment of the present invention. Figure 2AAs shown, the multi-feed antenna 2 includes a first conductor layer 21, a second conductor layer 22, four supporting conductor structures 231, 232, 233, and 234, and four feed conductor lines 241, 242, 243, and 244. The second conductor layer 22 has a first center position 221, and there is a first spacing d1 between the first conductor layer 21 and the second conductor layer 22. The four supporting conductor structures 231, 232, 233, and 234 are all located between the first conductor layer 21 and the second conductor layer 22, and are each electrically connected to the first conductor layer 21 and the second conductor layer 22. The four supporting conductor structures 231, 232, 233, and 234 form four electrically connected regions 2311, 2321, 2331, and 2341 on the second conductor layer 22. Furthermore, the four electrical connection regions 2311, 2321, 2331, and 2341 each extend from different edges 2211, 2212, 2213, and 2214 of the second conductor layer 22 towards the first center position 221, thereby forming four interconnected radiating conductor plates 222, 223, 224, and 225 in the second conductor layer 22. The supporting conductor structures 231, 232, and 234 are each composed of a single conductor sheet. The supporting conductor structure 233 is composed of two conductor sheets. Slot structures 22121 and 2214 are configured at different edges 2212 and 2214 of the second conductor layer 22 to reduce the area of ​​the second conductor layer 22. The four feed conductor lines 241, 242, 243, and 244 are all located between the first conductor layer 21 and the second conductor layer 22. The four feed conductors 241, 242, 243, and 244, and the four supporting conductor structures 231, 232, 233, and 234, are arranged in an alternating loop. Each feed conductor 241, 242, 243, and 244 has an electrical connection point 24111, 24211, 24311, or 24411 at one end electrically connected to a coupling conductor sheet 2411, 2421, 2431, or 24411 (e.g., ...). Figure 2B (As shown). Each of the coupling conductor sheets 2411, 2421, 2431, 2441 has a coupling distance s1, s2, s3, s4 between itself and one of the different radiating conductor plates 222, 223, 224, 225. Each of the feed conductor lines 241, 242, 243, 244 has another end electrically connected to a signal source 2412, 2422, 2432, 2442. The four feed conductor lines 241, 242, 243, 244 excite the second conductor layer 22 to generate at least four resonant modes 24121, 24221, 24321, 24421 (e.g., as shown). Figure 2CAs shown, the at least four resonant modes 24121, 24221, 24321, and 24421 cover at least one identical first communication frequency band 25. The coupling conductor sheets 2411, 2421, 2431, and 2441 are located between the first conductor layer 21 and the second conductor layer 22. The coupling spacings s1, s2, s3, and s4 are between 0.005 and 0.088 wavelengths of the lowest operating frequency of the first communication frequency band 25. The four supporting conductor structures 231, 232, 233, and 234 form four different resonant spaces 261, 262, 263, and 264 in the region between the first conductor layer 21 and the second conductor layer 22, and the four feed conductor lines 241, 242, 243, and 244 are located in different resonant spaces 261, 262, 263, and 264, respectively. The distance of the first spacing d1 is between 0.01 wavelength and 0.38 wavelengths of the lowest operating frequency of the first communication band 25. The area of ​​the second conductor layer 22 is between 0.25 wavelength squared and 0.99 wavelength squared of the lowest operating frequency of the first communication band 25. Figure 2B This diagram illustrates the structure of a closed region 27 formed by the lines connecting the four electrical connection points 24111, 24211, 24311, and 24411 of the four coupling conductor sheets 2411, 2421, 2431, and 24411 of a multi-feed antenna 2 according to an embodiment of the present invention. The lines connecting the four electrical connection points 24111, 24211, 24311, and 24411 form a closed region 27, the area of ​​which is between 0.1 wavelength squared and 0.49 wavelength squared of the lowest operating frequency of the first communication frequency band 25. The area of ​​the closed region 27 is smaller than the area of ​​the second conductor layer 22. The spacing between the slot structures 22121 and 22141 is between 0.005 wavelength and 0.088 wavelength of the lowest operating frequency of the first communication frequency band 25. The first conductor layer 21 and the second conductor layer 22 can also be implemented on a single-layer or multi-layer dielectric substrate. In one embodiment of the present invention, the second conductor layer 22 of the multi-feed antenna 2 is square in shape. The shape of the second conductor layer 12 can also be rectangular, circular, elliptical, rhomboid, polygonal, or other irregular shapes or combinations of slot shapes. The signal sources 2412, 2422, 2432, and 2442 are transmission lines, impedance matching circuits, amplifier circuits, feed networks, switching circuits, connector elements, filter circuits, integrated circuit chips, or RF front-end modules. The multi-feed antenna 2 can be configured as a single set or multiple sets for use in multi-input multi-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems.

[0049] Figure 2AIn one embodiment of the present invention, a multi-feed antenna 2 is designed such that the supporting conductor structures 231, 232, and 234 are composed of a single conductor sheet, while the supporting conductor structure 233 is composed of two conductor sheets. Furthermore, different edges 2212 and 2214 of the second conductor layer 22 are configured with slot structures 22121 and 22141 to reduce the area of ​​the second conductor layer 22. The coupling conductor sheets 2411, 2421, 2431, and 2441 are located between the first conductor layer 21 and the second conductor layer 22. Therefore, the structure of the multi-feed antenna 2 in this embodiment is not entirely the same as that of the multi-feed antenna 1 in this embodiment. However, the multi-feed antenna 2 also forms four electrical connection regions 2311, 2321, 2331, and 2341 in the second conductor layer 22 by designing the four supporting conductor structures 231, 232, 233, and 234. Furthermore, the four electrical connection regions 2311, 2321, 2331, and 2341 are designed to extend from different edges 2211, 2212, 2213, and 2214 of the second conductor layer 22 towards the first center position 221, respectively, so that the second conductor layer 22 forms four connected radiating conductor plates 222, 223, 224, and 225. This successfully achieves the multi-antenna miniaturization technology effect of the coexistence exciter of the four resonant modes 24121, 24221, 24321, and 24421 (e.g., Figure 2C (As shown). The multi-feed antenna 2 also forms an alternating ring arrangement between the first conductor layer 21 and the second conductor layer 22 by designing the four feed conductor lines 241, 242, 243, 244 and the four supporting conductor structures 231, 232, 233, 234. Furthermore, the four supporting conductor structures 231, 232, 233, 234 are designed so that the region between the first conductor layer 21 and the second conductor layer 22 forms four different resonance spaces 261, 262, 263, 264, and the four feed conductor lines 241, 242, 243, 244 are located in different resonance spaces 261, 262, 263, 264, respectively. This successfully achieves a good energy isolation level for the four resonance modes 24121, 24221, 24321, 24421 (e.g., ...). Figure 2D(As shown). The multi-feed antenna 2 is also designed with coupling spacings s1, s2, s3, and s4 between each of the coupling conductor plates 2411, 2421, 2431, and 2441 and one of the different radiating conductor plates 222, 223, 224, and 225. The coupling spacings s1, s2, s3, and s4 are designed to be between 0.005 wavelengths and 0.088 wavelengths from the lowest operating frequency of the first communication band 25. This successfully achieves good impedance matching for the four resonant modes 24121, 24221, 24321, and 24421 (e.g., ...). Figure 2C (As shown). The multi-feed antenna 2 is also designed such that the distance of the first spacing d1 is between 0.01 wavelength and 0.38 wavelengths of the lowest operating frequency of the first communication band 25, and the area of ​​the second conductor layer 22 is between 0.25 wavelength squared and 0.99 wavelength squared of the lowest operating frequency of the first communication band 25. Furthermore, the connection lines of the four electrical connection points 24111, 24211, 24311, and 24411 of the four coupling conductor sheets 2411, 24211, 24311, and 24411 form a closed region 27 (e.g., ...). Figure 2B As shown), the area of ​​the enclosed region 27 is between 0.1 wavelength squared and 0.49 wavelength squared of the lowest operating frequency of the first communication band 25, and the area of ​​the enclosed region 27 is smaller than the area of ​​the second conductor layer 22. This is to successfully excite the multi-feed antenna 2 to produce good radiation efficiency characteristics (e.g., Figure 2E (As shown). The multi-feed antenna 2 can be configured as a single set or multiple sets for use in multiple-input multiple-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems. Therefore, the multi-feed antenna 2 of this embodiment can also achieve the same multi-antenna compatibility integration technical effect as the multi-feed antenna 1 of the above embodiment.

[0050] Figure 2C This is a return loss curve of a multi-feed antenna 2 according to an embodiment of the present invention. The following dimensions were selected for the experiment: the distance of the first spacing d1 is approximately 10 mm; the area of ​​the second conductor layer 22 is approximately 1521 mm². 2 The area of ​​the enclosed region 27 is approximately 450 mm². 2 The coupling spacings s1, s2, s3, and s4 are all approximately 1 mm apart; the spacing between the slot structures 22121 and 22141 is approximately 3 mm apart. Figure 2CAs shown, the signal sources 2412, 2422, 2432, and 2442 excite the multi-feed antenna 2 to generate four well-matched resonant modes 24121, 24221, 24321, and 24421. These four resonant modes 24121, 24221, 24321, and 24421 cover at least one first communication frequency band 25. In this embodiment, the frequency range of the first communication frequency band 25 is 3300MHz to 5000MHz, and the lowest operating frequency of the first communication frequency band 25 is 3300MHz. Figure 2D This is an isolation curve diagram of a multi-feed antenna 2 according to an embodiment of the present invention. As shown in the 2D diagram, the isolation curve between signal source 2412 and signal source 2422 is 241222, the isolation curve between signal source 2412 and signal source 2442 is 241242, and the isolation curve between signal source 2412 and signal source 2432 is 241232. Figure 2D As shown, the multi-feed signal source 2412 of the multi-feed antenna 2 can achieve good isolation from the signal source 2422, the signal source 2432, and the signal source 2442. Figure 2E This is a radiation efficiency curve of a multi-feed antenna 2 according to an embodiment of the present invention. Figure 2E As shown, the resonant modes 24121 and 24221 excited by the two adjacent signal sources 2412 and 2422 both have good radiation efficiencies 24122 and 24222. In addition, the configuration of the two adjacent signal sources 2432 and 2442 is roughly symmetrical with that of signal sources 2412 and 2422, so the resonant modes 24321 and 24421 can also achieve good radiation efficiency characteristics.

[0051] Figure 2C , Figure 2D , Figure 2E The communication frequency band operations and experimental data covered are only for experimental demonstration purposes. Figure 2A The technical efficacy of the multi-feed antenna 2 according to an embodiment of the present invention is not intended to limit the communication frequency band operation, application, and specifications that the multi-feed antenna 2 of the present invention can cover in practical applications. The multi-feed antenna 2 can be configured as a single set or multiple sets for use in multiple-input multiple-output antenna systems, field-shape switching antenna systems, or beamforming antenna systems.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-feed antenna, comprising: First conductor layer; A second conductor layer having a first center position, and a first spacing between the second conductor layer and the first conductor layer; Four supporting conductor structures are located between the first conductor layer and the second conductor layer, and each is electrically connected to the first conductor layer and the second conductor layer. The four supporting conductor structures form four electrically connected regions on the second conductor layer, and the four electrically connected regions extend from different edges of the second conductor layer toward the first center position, so that the second conductor layer forms four connected radiating conductor plates. as well as Four feed conductor lines are located between the first conductor layer and the second conductor layer. The four feed conductor lines and the four supporting conductor structures form an alternating loop arrangement. Each feed conductor line has an electrical connection point at one end that is electrically connected to a coupling conductor sheet. Each coupling conductor sheet has a coupling gap with a different one of the radiating conductor plates. Each feed conductor line also has another end that is electrically connected to a signal source. The four feed conductor lines excite the second conductor layer to generate at least four resonant modes. The at least four resonant modes cover at least one identical first communication frequency band.

2. The multi-feed antenna according to claim 1, wherein, The four supporting conductor structures enable the region between the first conductor layer and the second conductor layer to form four different resonance spaces, and the four feed conductor lines are respectively located in different resonance spaces.

3. The multi-feed antenna according to claim 1, wherein, The distance of the first spacing d1 is between 0.01 wavelength and 0.38 wavelength of the lowest operating frequency of the first communication band.

4. The multi-feed antenna according to claim 1, wherein, The area of ​​the second conductor layer is between 0.25 wavelength squared and 0.99 wavelength squared of the lowest operating frequency of the first communication band.

5. The multi-feed antenna according to claim 1, wherein, The lines connecting the four electrical connection points form a closed region, the area of ​​which is between 0.1 wavelength squared and 0.49 wavelength squared of the lowest operating frequency of the first communication band.

6. The multi-feed antenna according to claim 5, wherein, The area of ​​the enclosed region is smaller than the area of ​​the second conductor layer.

7. The multi-feed antenna according to claim 1, wherein, The coupling gap is between 0.005 wavelengths and 0.088 wavelengths of the lowest operating frequency of the first communication band.

8. The multi-feed antenna according to claim 1, wherein, The signal source is a transmission line, impedance matching circuit, amplifier circuit, feed network, switching circuit, connector element, filter circuit, integrated circuit chip or radio frequency front-end module.

9. The multi-feed antenna according to claim 1, wherein, The supporting conductor structure is composed of multiple conductor wires.

10. The multi-feed antenna according to claim 1, wherein, The supporting conductor structure is composed of one or more conductor sheets.

11. The multi-feed antenna according to claim 1, wherein, The second conductor layer is configured with slot structures at different edges to reduce the area of ​​the second conductor layer.

12. The multi-feed antenna according to claim 11, wherein, The spacing of the slot structure is between 0.005 wavelengths and 0.088 wavelengths of the lowest operating frequency of the first communication band.

13. The multi-feed antenna according to claim 1, wherein, The coupling conductor sheet is located between the first conductor layer and the second conductor layer.

14. The multi-feed antenna according to claim 1, wherein, The coupling conductor sheet and the second conductor layer are located in the same plane.

15. The multi-feed antenna according to claim 1, wherein, The multi-feed antenna configuration, either as a single group or in multiple groups, is used in multi-input multi-output antenna systems, field shape switching antenna systems, or beamforming antenna systems.

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