An Antenna System for Simultaneous and Same-Frequency Full-Duplex Communication
A co-frequency full-duplex, antenna system technology, applied in the direction of duplex signal operation, transmission system, electrical components, etc., can solve the problems of limited suppression capability, complex and different feeder networks or duplex networks, etc. Simple, miniaturization, and broad application prospects
Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
In the technical solution disclosed in this patent, the digital-to-analog conversion module is required to process the receiving signal and the transmitting signal separately, and the antennas at the receiving and receiving ends are different, and its self-interference suppression reconstruction and suppression can only be performed in the intermediate frequency domain, and the suppression ability limited
[0010] In addition, there have been corresponding reports on circularly polarized antennas that use the spin configuration to achieve local reception and transmission with high isolation performance, but these schemes have relatively complicated feeding networks or duplex networks, and are not conducive to miniaturization
At present, there is no full-duplex antenna system with strong self-interference suppression ability and simple structure at the same time that the transceiver ports share a feed network.
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0026] This embodiment provides an antenna system for simultaneous and same-frequency full-duplex communication, including an antenna array and a full-duplex network;
[0027] The antenna array includes four sub-arrays with the same structure, which are respectively recorded as the first sub-array, the second sub-array, the third sub-array, and the fourth sub-array; the four sub-arrays are distributed in a rectangular grid and evenly distributed on the same circumference ; The first sub-array, the second sub-array, the third sub-array, and the fourth sub-array rotate 0°, 90°, 180°, and 270° clockwise around their own phase centers respectively; each sub-array is two linear polarizations The dual-polarized antenna composed of units is respectively recorded as the first linearly polarized unit 011, 013, 015, 017 and the second linearly polarized unit 012,...
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The invention discloses an antenna system for simultaneous and same-frequency full-duplex communication, which belongs to the technical field of microwave antennas. The invention includes an antenna array and a full duplex network. The invention is different from the full-duplex network in the prior art which adopts an active source interference suppression scheme, adopts a passive structure, and has reciprocity as a whole, so that the system interface is more flexible. The local receiving and sending ends of the present invention all work in the same circular polarization state, the reflection generated by the impedance mismatch at the feed network and the antenna interface, the mutual coupling between each unit in the antenna array, and the local transmitter through the feed The self-interference signal generated by network leakage can be effectively canceled at the local receiving end. The present invention can be realized by low-profile microstrip technology. Compared with the active cancellation scheme, the passive cancellation scheme does not need to consider the nonlinear effect of the network and does not have a DC bias network, which makes the entire network more compact and contributes to small has broad application prospects.
Description
technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to an antenna system for simultaneous and same-frequency full-duplex communication. Background technique [0002] With the application and rapid development of wireless communication technology, wireless communication has become an indispensable means of communication and communication for individuals and society. The current wireless spectrum resources are nearly exhausted, while the demand for spectrum resources by wireless communication services is increasing exponentially. In order to make full use of limited spectrum resources, simultaneous and same-frequency full-duplex technology emerged as the times require. Different from the existing frequency-division duplex and time-division duplex, simultaneous same-frequency full-duplex wireless communication transmits and receives wireless signals at the same operating frequency, so that the capacity of wireles...
Claims
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IPC IPC(8): H04B1/40H04B1/10H04L5/14
CPCH04B1/10H04B1/1027H04B1/40H04L5/14
Inventor 李家林张瑞芳夏雷李华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA