Multi-mode antenna for non-contact high-speed connector

Abstract

The invention provides a multi-mode antenna for a non-contact high-speed connector. The key point of the multi-mode antenna is a multi-mode feed network. The multimode feed network comprises a mode converter structure, an orthogonal mode converter structure and a common circular waveguide structure; the common circular waveguide structure comprises a first circular waveguide, a second circular waveguide and a third circular waveguide, the first circular waveguide propagates a TE01 mode, a TM01 mode, a # imgabs 0 # mode and a # imgabs 1 # mode, the second circular waveguide propagates a TM01 mode, a # imgabs 2 # mode and a # imgabs 3 # mode, and the third circular waveguide propagates a # imgabs 4 # mode and a # imgabs 5 # mode; the mode converter structure comprises a first waveguide transmission structure and a second waveguide transmission structure, the first waveguide transmission structure is connected with the first circular waveguide, the second waveguide transmission structure is connected with the second circular waveguide, and the orthogonal mode converter structure is connected with the third circular waveguide.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and in particular, to a multi-mode antenna for a non-contact high-speed connector. Background Art

[0002] Millimeter waves refer to electromagnetic waves with a frequency range between 30 GHz and 300 GHz, which have the advantages of large bandwidth and high data transmission rate. Traditional physically connected high-speed connectors have problems with connector wear during repeated plugging and unplugging processes. The non-contact connection established using millimeter-wave short-range communication, that is, a wireless connection is adopted between the transceiver and the physical structure is separated, can effectively avoid wear. In order to achieve an efficient non-contact connection, the antenna needs to support the propagation of multiple orthogonal modes to enable parallel transmission of multiple data streams within the same frequency band.

[0003] A multi-mode antenna is an antenna design that can support multiple-mode transmissions and has a common-aperture characteristic, that is, multiple orthogonal modes can be simultaneously excited and transmitted within the same physical aperture. Due to this common-aperture characteristic, the structure of the multi-mode antenna is highly compact, thus having significant advantages in terms of miniaturization and being convenient for integration into high-density communication devices. By achieving multi-mode transmission within the same frequency band, the multi-mode antenna can significantly improve the spectral efficiency and communication capacity. This technology provides an efficient and flexible solution for non-contact connectors, which is conducive to promoting the wide application of millimeter-wave communication in fields such as intelligent device interaction, industrial automation, and high-density network deployment.

[0004] However, the antennas of the existing technologies are limited by the structure and often have a small communication capacity and a low data transmission efficiency. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a multi-mode antenna for a non-contact high-speed connector to eliminate or improve one or more defects existing in the prior art.

[0006] One aspect of the present invention provides a multi-mode antenna for a non-contact high-speed connector. The multi-mode antenna includes a multi-mode feeding network. The key of the multi-mode antenna is the multi-mode feeding network, and the multi-mode feeding network includes a mode converter structure, an orthogonal mode converter structure, and a common circular waveguide structure; the common circular waveguide structure includes a first circular waveguide, a second circular waveguide, and a third circular waveguide that are sequentially connected and have gradually decreasing diameters. The first circular waveguide can propagate TE 01 , TM 01 , and modes, the second circular waveguide can propagate TM 01 , and modes, and the third circular waveguide can propagate and Mode;

[0007] The mode converter structure includes a first waveguide transmission structure and a second waveguide transmission structure. The first waveguide transmission structure is connected to a first circular waveguide, the second waveguide transmission structure is connected to a second circular waveguide, and the orthogonal mode converter structure is connected to a third circular waveguide.

[0008] In a specific implementation process, the multimode antenna further includes a horn antenna, and the horn antenna in this solution adopts an existing horn antenna structure.

[0009] Adopting the above solution, the multimode antenna of this solution can support the transmission of multiple orthogonal modes within the same frequency band, significantly improving the spectral utilization rate and communication capacity. These four modes can propagate simultaneously in the common circular waveguide structure, reflecting the common aperture characteristic of the multimode antenna. This design not only makes the antenna structure compact, but also significantly reduces the size, facilitating integration into high-density communication devices and improving the communication capacity and data transmission efficiency.

[0010] In some embodiments of the present invention, the diameter of the first circular waveguide is greater than 6.8 mm, the diameter range of the second circular waveguide is 4.3 mm - 5.5 mm, and the diameter range of the third circular waveguide is 3.14 mm - 3.45 mm.

[0011] In some embodiments of the present invention, the diameter of the first circular waveguide is 7.4 mm, the diameter of the second circular waveguide is 5.44 mm, and the diameter range of the third circular waveguide is 3.36 mm.

[0012] In some embodiments of the present invention, one end of the first circular waveguide of the common circular waveguide structure where a circular surface is located is used to connect to the horn antenna and access the millimeter wave introduced by the horn antenna. The other end of the first circular waveguide where the other circular surface is located is used to connect to a circular surface of the second circular waveguide. One end of the second circular waveguide where the other circular surface is located is used to connect to a circular surface of the third circular waveguide, and the other circular surface of the third circular waveguide is used to connect to the orthogonal mode converter structure.

[0013] In some embodiments of the present invention, the first waveguide transmission structure is a symmetrically arranged first transmission channel and a second transmission channel. One end of the first transmission channel and the second transmission channel are both connected to the arc surface of the first circular waveguide. The other ends of the first transmission channel and the second transmission channel are connected, and a fourth port is connected to the connection end of the first transmission channel and the second transmission channel.

[0014] In some embodiments of the present invention, the first transmission channel includes a first main channel, a first sub-channel, and a second sub-channel. One ends of the first sub-channel and the second sub-channel are both connected to a first circular waveguide. The other ends of the first sub-channel and the second sub-channel are connected to each other and connected to the first main channel. The second transmission channel includes a second main channel, a third sub-channel, and a fourth sub-channel. One ends of the third sub-channel and the fourth sub-channel are both connected to the first circular waveguide. The other ends of the third sub-channel and the fourth sub-channel are connected to each other and connected to the second main channel.

[0015] In some embodiments of the present invention, the second waveguide transmission structure is a symmetrically arranged third transmission channel and fourth transmission channel. One ends of the third transmission channel and the fourth transmission channel are both connected to the arc surface of a second circular waveguide. The other ends of the third transmission channel and the fourth transmission channel are connected to each other, and a third port is connected to the connection end of the third transmission channel and the fourth transmission channel.

[0016] In some embodiments of the present invention, the orthogonal mode converter structure includes a first port and a second port. The first port is at one end of a first port transmission channel, and the second port is at one end of a second port transmission channel. The first port transmission channel is perpendicular to the second port transmission channel. The first port is used to excite the TE 11 x mode, and the second port is used to excite the TE 11 y mode.

[0017] In some embodiments of the present invention, the other end of the first port transmission channel is connected to a third circular waveguide of the common circular waveguide structure, and the other end of the second port transmission channel is connected to the first port transmission channel.

[0018] In some embodiments of the present invention, both the first port transmission channel and the second port transmission channel extend linearly, and one end of the first port transmission channel is connected to the circular surface of the third circular waveguide.

[0019] Additional advantages, objects, and features of the present invention will be partly set forth in the description below, and will partly become apparent to those of ordinary skill in the art after study of the following, or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by specifically pointing out in the specification and the drawings.

[0020] Those skilled in the art will understand that the objects and advantages that can be achieved by the present invention are not limited to the above specifically described, and the above and other objects that the present invention can achieve will be more clearly understood according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not limit the present invention.

[0022] Figure 1 It is a perspective schematic diagram of the multimode antenna for the non-contact high-speed connector of this solution;

[0023] Figure 2 It is a perspective schematic diagram of another angle of the multimode antenna for the non-contact high-speed connector of this solution;

[0024] Figure 3 It is a perspective structural schematic diagram of the common circular waveguide structure of this solution;

[0025] Figure 4 It is a perspective structural schematic diagram of the orthogonal mode converter structure of this solution;

[0026] Figure 5 It is a perspective structural schematic diagram of another angle of the orthogonal mode converter structure of this solution;

[0027] Figure 6 It is a perspective structural schematic diagram of the mode converter structure of this solution;

[0028] Figure 7 It is a perspective structural schematic diagram of another angle of the mode converter structure of this solution;

[0029] Figure 8 It is a schematic diagram of the simulation result of the experimental example of this solution;

[0030] Figure 9 It is a schematic diagram of the complete structure of the multimode horn antenna;

[0031] Figure 10 It is a distribution diagram of the electric field of four orthogonal modes in the circular waveguide;

[0032] Figure 11 It is the overall logic relationship diagram of this solution.

[0033] Explanation of Reference Numerals

[0034] 1. Mode converter structure; 11. First waveguide transmission structure; 111. First transmission channel; 1111. First main channel; 1112. First sub-channel; 1113. Second sub-channel; 112. Second transmission channel; 1121. Second main channel; 1122. Third sub-channel; 1123. Fourth sub-channel; 113. Fourth port; 12. Second waveguide transmission structure; 121. Third transmission channel; 122. Fourth transmission channel; 123. Third port; 2. Orthogonal mode converter structure; 21. First port; 22. Second port; 23. First port transmission channel; 24. Second port transmission channel; 3. Common circular waveguide structure; 31. First circular waveguide; 32. Second circular waveguide; 33. Third circular waveguide; Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the implementation manners and the accompanying drawings. Herein, the illustrative implementation manners of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0036] Herein, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0037] As Figure 1 、 3 shown in 4, 6, 7 and 11, the present invention provides a multi-mode antenna for a non-contact high-speed connector, and the multi-mode antenna includes a mode converter structure 1, an orthogonal mode converter structure 2 and a common circular waveguide structure 3;

[0038] The common circular waveguide structure includes a first circular waveguide 31, a second circular waveguide 32 and a third circular waveguide 33 that are sequentially connected and have gradually decreasing diameters. The first circular waveguide can propagate TE 01 , TM 01 , and modes, the second circular waveguide can propagate TM 01 , and modes, and the third circular waveguide can propagate and modes;

[0039] The mode converter structure 1 includes a first waveguide transmission structure 11 and a second waveguide transmission structure 12. The first waveguide transmission structure 11 is connected to the first circular waveguide, the second waveguide transmission structure is connected to the second circular waveguide, and the orthogonal mode converter structure is connected to the third circular waveguide.

[0040] With the above - mentioned solution, the multi - mode antenna of this solution can support the transmission of multiple orthogonal modes within the same frequency band, significantly improving the spectrum utilization rate and communication capacity. These four modes can propagate simultaneously in the common circular waveguide structure, reflecting the common - aperture characteristic of the multi - mode antenna. This design not only makes the antenna structure compact but also significantly reduces the size, facilitating integration into high - density communication devices and improving the communication capacity and data transmission efficiency.

[0041] As Figure 3 shown, in some embodiments of the present invention, the diameter of the first circular waveguide is greater than 6.8 mm, the diameter range of the second circular waveguide is 4.3 mm - 5.5 mm, and the diameter range of the third circular waveguide is 3.14 mm - 3.45 mm.

[0042] In some embodiments of the present invention, the diameter of the first circular waveguide is 7.4 mm, the diameter of the second circular waveguide is 5.44 mm, and the diameter range of the third circular waveguide is 3.36 mm.

[0043] As Figure 1 、 4 and 6 show, this network includes four excitation ports, namely the first port 21, the second port 22, the third port 123, and the fourth port 113, as well as a port for connecting a horn antenna to radiate signals. Among them, the first port, the second port, the third port, and the fourth port are respectively used to excite TE 11 x 、TE 11 y 、TM 01 and TE 01 four orthogonal modes, as Figure 10 shown. These four modes share a common circular waveguide mode - conversion part, and its detailed structure is as Figure 1 and 2 shown. This part is the key component for isolating TE 11 x 、TE 11 y 、TM 01 and TE 01 modes. The cut - off frequencies of the circular waveguide modes are listed in Table 1. The bold words in Table 1 are the corresponding cut - off frequencies of the modes;

[0044] Table 1

[0045]

[0046] With the above - mentioned solution, by designing the multi - mode feeding network in this way, the multi - mode antenna can support the transmission of multiple orthogonal modes within the same frequency band, significantly improving the spectral efficiency and communication capacity. These four modes can propagate simultaneously in the common circular waveguide, reflecting the co - aperture characteristic of the multi - mode antenna. This design not only makes the antenna structure compact but also significantly reduces the size, facilitating integration into high - density communication devices.

[0047] The multi - mode feeding network can be split into two parts: an orthogonal mode transducer (OMT) and a mode converter. The core function of the OMT is to excite the TE 11 x and TE 11 y modes, while the mode converter is used to generate the TM 01 and TE 01 modes.

[0048] As Figure 3 shown, in some embodiments of the present invention, one end of the first circular waveguide of the common circular waveguide structure, where a circular surface is located, is used to connect to the horn antenna and receive the millimeter - wave incoming from the horn antenna. The other end of the first circular waveguide, where another circular surface is located, is used to connect to one circular surface of the second circular waveguide. One end of the other circular surface of the second circular waveguide is used to connect to one circular surface of the third circular waveguide, and the other circular surface of the third circular waveguide is used to connect to the orthogonal mode converter structure.

[0049] As Figure 6 and 7 shown, in some embodiments of the present invention, the first waveguide transmission structure 11 is a symmetrically arranged first transmission channel 111 and second transmission channel 112. One end of each of the first transmission channel 111 and the second transmission channel 112 is connected to the arc surface of the first circular waveguide. The other ends of the first transmission channel 111 and the second transmission channel 112 are connected, and a fourth port is connected at the connection end of the first transmission channel 111 and the second transmission channel 112.

[0050] As Figure 6 and 7As shown, in some embodiments of the present invention, the first transmission channel 111 includes a first main channel 1111, a first sub-channel 1112, and a second sub-channel 1113. One end of the first sub-channel 1112 and the second sub-channel 1113 is connected to the first circular waveguide. The other ends of the first sub-channel 1112 and the second sub-channel 1113 are connected to each other and connected to the first main channel 1111. The second transmission channel 112 includes a second main channel 1121, a third sub-channel 1122, and a fourth sub-channel 1123. One end of the third sub-channel 123 and the fourth sub-channel 113 is connected to the first circular waveguide. The other ends of the third sub-channel and the fourth sub-channel are connected to each other and connected to the second main channel 1121.

[0051] In some embodiments of the present invention, the second waveguide transmission structure is a symmetrically arranged third transmission channel 121 and a fourth transmission channel 122. One end of the third transmission channel and the fourth transmission channel is connected to the arc surface of the second circular waveguide. The other ends of the third transmission channel and the fourth transmission channel are connected to each other, and a third port is connected to the connection end of the third transmission channel and the fourth transmission channel.

[0052] Adopting the above scheme, the mode converter structure 1 is as Figure 6 shown. The third port and the fourth port are respectively used to excite TM 01 and TE 01 modes. The top port of the common circular waveguide structure is used to connect to the OMT, and the bottom port of the common circular waveguide structure is used to connect to the horn antenna to radiate the signal. This design efficiently converts the fundamental mode (TE 10 ) in the rectangular waveguide into high-order modes (TM 01 and TE 01 ) in the circular waveguide through the sidewall coupling method, thereby realizing multi-mode transmission. The sidewall coupling structure not only simplifies the design of the mode converter but also improves the excitation efficiency of the mode, ensuring the stable performance of the multi-mode antenna in a wide frequency band.

[0053] As Figure 4 and 5 shown, in some embodiments of the present invention, the orthogonal mode converter structure includes a first port and a second port. The first port is at one end of the first port transmission channel 23, and the second port is at one end of the second port transmission channel 24. The first port transmission channel is perpendicular to the second port transmission channel. The first port is used to excite the TE 11 x mode, and the second port is used to excite the TE 11 y mode.

[0054] In some embodiments of the present invention, the other end of the first port transmission channel is connected to the third circular waveguide of the common circular waveguide structure, and the other end of the second port transmission channel is connected to the first port transmission channel.

[0055] In some embodiments of the present invention, both the first port transmission channel and the second port transmission channel extend along a straight line, and one end of the first port transmission channel is connected to the circular surface of the third circular waveguide.

[0056] With the above scheme, the first port and the second port are used to excite TE 11 x and TE 11 y modes. The other port of the orthogonal mode converter structure is connected to the mode converter. This structure has good isolation performance, can effectively excite two orthogonal modes, and at the same time ensures a high degree of isolation between the modes, reduces interference, and guarantees the purity and transmission efficiency of the signal.

[0057] In addition, the compact design of the orthogonal mode converter enables it to have a small volume and a high degree of integration while achieving a high degree of isolation. This design not only saves space but also facilitates integration with the mode converter, further improving the performance of the entire multimode feeding network. Therefore, the orthogonal mode converter plays a crucial role in the multimode antenna system, providing strong support for the efficient transmission of multiple orthogonal modes and the co-aperture characteristics.

[0058] In the specific implementation process, the multimode feeding network of this scheme can simultaneously excite TE 11 x 、TE 11 y 、TM 01 and TE 01 four orthogonal modes. Through this design, the multimode antenna can support the transmission of multiple data streams simultaneously within the same frequency band, thus significantly improving the spectrum utilization rate and communication capacity. In addition, the optimized design of the feeding network also ensures low-loss transmission and high isolation between the modes, further improving the overall performance of the antenna.

[0059] Experimental example;

[0060] As Figure 9 shown, Figure 9 in the figure, port 1 and port a correspond to the first port; port 2 and port b correspond to the second port; port 3 and port c correspond to the third port; port 4 and port d correspond to the fourth port; in order to construct a complete multimode horn antenna, the multimode feeding network is connected to the horn antenna to form as Figure 9The structure shown. Two multimode horn antennas are simulated using HFSS, and the simulation conditions are a communication spacing of 20 mm and an offset of 0 mm. The simulation results are as Figure 8 shown. The transmission coefficient between ports is better than -22.5 dB, and the port isolation is better than 32 dB. It should be noted that the surface waves and reflected waves generated by the parallel plate structure are the main reasons for the decrease in isolation. Therefore, an absorbing material is used to absorb the surface waves and reflected waves to improve the isolation performance from the perspective of suppressing multipath effects.

[0061] In summary, the non-contact connector has significant advantages by achieving multi-channel transmission and miniaturization. Multi-channel transmission can significantly improve the communication capacity and data transmission efficiency, make full use of the spectral resources in the millimeter-wave band, and meet the high-capacity and low-latency requirements in high-density user environments. At the same time, the miniaturized design makes the connector easier to integrate into compact devices, reduces the deployment difficulty and cost, and improves the portability and flexibility of the device. To achieve these advantages, multimode antenna technology becomes the key. Multimode antennas have a common aperture characteristic, which can support multiple orthogonal modes to be simultaneously excited and transmitted within the same physical aperture, thus realizing the parallel transmission of multiple data streams. Also due to the common aperture characteristic, the structure of multimode antennas is highly compact, thus having significant advantages in terms of miniaturization and being convenient to integrate into high-density communication devices. Through the efficient design of multimode antennas in this solution, the non-contact connector can achieve efficient and reliable millimeter-wave communication in complex and changing communication environments, providing strong support for future wireless communication systems.

[0062] The beneficial effects of this solution include:

[0063] 1. The multimode feeding network supports the simultaneous propagation of four orthogonal modes

[0064] The multimode feeding network can simultaneously excite and support the propagation of TE 11 x , TE 11 y , TM 01 and TE 01 four orthogonal modes. By realizing multi-mode transmission within the same frequency band, the spectral utilization rate and communication capacity are significantly improved, which is especially suitable for high-density and high-capacity communication scenarios.

[0065] 2. The advantages of the miniaturized design at the application level

[0066] The common aperture characteristic of the multi-mode antenna makes its structure highly compact and significantly reduces its size. This miniaturized design facilitates integration into non-contact connectors, especially suitable for application scenarios with strict space requirements, such as smartphones, wearable devices, Internet of Things terminals, industrial sensors, and compact base stations. Through the miniaturized design, non-contact connectors can better meet the requirements of modern communication devices for high integration and portability, providing an efficient and flexible solution for future wireless communication systems.

[0067] Those of ordinary skill in the art should understand that the various exemplary components, systems, and methods described in conjunction with the embodiments disclosed herein can be implemented in hardware, software, or a combination of both. Specifically, whether to implement in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present invention are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium or transmitted via a data signal carried in a carrier wave over a transmission medium or a communication link.

[0068] It should be clear that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art can make various changes, modifications, and additions, or change the order between steps after understanding the spirit of the present invention.

[0069] In the present invention, the features described and / or illustrated for one embodiment can be used in the same or a similar manner in one or more other embodiments, and / or combined with the features of other embodiments or replace the features of other embodiments.

[0070] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multimode antenna for a non-contact high-speed connector, characterized in that, The multi-mode antenna includes a multi-mode feeding network, and the multi-mode feeding network includes a mode converter structure, an orthogonal mode converter structure, and a common circular waveguide structure; the common circular waveguide structure includes a first circular waveguide, a second circular waveguide, and a third circular waveguide that are sequentially connected and have gradually decreasing diameters, and the first circular waveguide can propagate TE 01 , TM 01 , and modes, the second circular waveguide can propagate TM 01 , and modes, and the third circular waveguide can propagate and modes; The mode converter structure includes a first waveguide transmission structure and a second waveguide transmission structure. The first waveguide transmission structure is connected to a first circular waveguide, the second waveguide transmission structure is connected to a second circular waveguide, and the orthogonal mode converter structure is connected to a third circular waveguide.

2. The multi-mode antenna for a non-contact high-speed connector according to claim 1, wherein The diameter of the first circular waveguide is greater than 6.8 mm, the diameter of the second circular waveguide ranges from 4.3 mm to 5.5 mm, and the diameter of the third circular waveguide ranges from 3.14 mm to 3.45 mm.

3. The multimode antenna for a non-contact high-speed connector according to claim 2, wherein The diameter of the first circular waveguide is 7.4 mm, the diameter of the second circular waveguide is 5.44 mm, and the diameter of the third circular waveguide is 3.36 mm.

4. The multimode antenna for a non-contact high-speed connector according to claim 1, characterized in that, One end of the first circular waveguide of the common circular waveguide structure, where a circular surface is located, is used to connect to a horn antenna and receive the millimeter wave transmitted by the horn antenna. The other end of the first circular waveguide, where the other circular surface is located, is used to connect to a circular surface of the second circular waveguide. One end of the second circular waveguide, where the other circular surface is located, is used to connect to a circular surface of the third circular waveguide. The other circular surface of the third circular waveguide is used to connect to the orthogonal mode converter structure.

5. The multimode antenna for a non-contact high-speed connector according to claim 1, characterized in that, The first waveguide transmission structure (11) is a symmetrically arranged first transmission channel (111) and second transmission channel (112). One end of each of the first transmission channel (111) and second transmission channel (112) is connected to the arc surface of the first circular waveguide. The other ends of the first transmission channel (111) and second transmission channel (112) are connected, and a fourth port is connected to the connection end of the first transmission channel (111) and second transmission channel (112).

6. The multimode antenna for a non-contact high-speed connector according to claim 5, characterized in that The first transmission channel (111) includes a first main channel (1111), a first sub-channel (1112), and a second sub-channel (1113). One end of each of the first sub-channel (1112) and second sub-channel (1113) is connected to the first circular waveguide. The other ends of the first sub-channel (1112) and second sub-channel (1113) are connected and then connected to the first main channel (1111). The second transmission channel (112) includes a second main channel (1121), a third sub-channel, and a fourth sub-channel. One end of each of the third sub-channel and fourth sub-channel is connected to the first circular waveguide. The other ends of the third sub-channel and fourth sub-channel are connected and then connected to the second main channel (1121).

7. The multimode antenna for a non-contact high-speed connector according to claim 6, characterized in that, The second waveguide transmission structure is a symmetrically arranged third transmission channel (121) and fourth transmission channel (122). One end of each of the third transmission channel and fourth transmission channel is connected to the arc surface of the second circular waveguide. The other ends of the third transmission channel and fourth transmission channel are connected, and a third port is connected to the connection end of the third transmission channel and fourth transmission channel.

8. The multimode antenna for a non-contact high-speed connector according to claim 1, characterized in that, The orthogonal mode converter structure includes a first port and a second port. The first port is at one end of the first port transmission channel, and the second port is at one end of the second port transmission channel. The first port transmission channel is perpendicular to the second port transmission channel. The first port is used to excite the TE 11 x mode, and the second port is used to excite the TE 11 y mode.

9. The multimode antenna for a non-contact high-speed connector according to claim 8, characterized in that, The other end of the first port transmission channel is connected to the third circular waveguide of the common circular waveguide structure, and the other end of the second port transmission channel is connected to the first port transmission channel.

10. The multimode antenna for a non-contact high-speed connector according to claim 9, characterized in that, Both the first port transmission channel and the second port transmission channel extend along a straight line, and one end of the first port transmission channel is connected to the circular surface of the third circular waveguide.

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