CN-121983785-A - Amplitude-phase adjustable multi-beam antenna system

CN121983785ACN 121983785 ACN121983785 ACN 121983785ACN-121983785-A

Abstract

The invention discloses an amplitude-phase adjustable multi-beam antenna system which comprises N input ports, N output ports, a coupler cascade module, an amplitude weight module and a phase adjustment module, wherein the coupler cascade module, the amplitude weight module and the phase adjustment module are sequentially cascaded, the signal input end of the coupler cascade module is connected with the N input ports, the signal output end of the coupler cascade module is connected with the input end of the amplitude weight module, the output end of the amplitude weight module is connected with the input end of the phase adjustment module, the output end of the phase adjustment module is connected with the N output ports, after a radio frequency signal is processed into a constant amplitude fixed phase difference signal through the coupler cascade module, the weight redistribution of the signal amplitude is realized through the amplitude weight module, the fine adjustment of the phase is realized through the phase adjustment module, and the amplitude and the phase of each output port can be independently configured according to actual requirements, so that multi-beam scanning and side lobe suppression or main lobe beam wave width adjustment in a directional diagram can be realized in a space range.

Inventors

OUYANG QIULING
Hong Jiaquan
LI CHUNBIN
LI ZEXIN
WU XIAOBIN
HUANG MINGLU
LI MINPING
CHEN QIANG

Assignees

广东通宇通讯股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260210

Claims (8)

1. The amplitude-phase adjustable multi-beam antenna system is characterized by comprising N input ports, N output ports, a coupler cascading module (10), an amplitude weight module (20) and a phase adjusting module (30), wherein the coupler cascading module, the amplitude weight module (20) and the phase adjusting module (30) are sequentially cascaded, and N is an integer greater than or equal to 2; The signal input end of the coupler cascade module (10) is connected with the N input ports, the signal output end of the coupler cascade module (10) is connected with the input end of the amplitude weight module (20), the output end of the amplitude weight module (20) is connected with the input end of the phase adjustment module (30), and the output end of the phase adjustment module (30) is connected with the N output ports; the N input ports are used for being electrically connected with a radio frequency interface, and the N output ports are used for being electrically connected with an antenna array (40); The coupler cascade module (10) is used for processing an input radio frequency signal into a signal with a constant amplitude and fixed phase difference and outputting the signal, the amplitude weight module (20) is used for carrying out amplitude weight redistribution on the signal output by the coupler cascade module (10), and the phase adjusting module (30) is used for carrying out phase adjustment on the signal output by the amplitude weight module (20).
2. The amplitude and phase tunable multi-beam antenna system according to claim 1, wherein the coupler cascade module (10) comprises a plurality of coupler assemblies cascaded in sequence, the coupler assemblies comprise a plurality of couplers, the input ends of the coupler assemblies are connected with the N input ports, and the output ends of the coupler assemblies are connected with the input ends of the amplitude weight module (20).
3. The amplitude phase tunable multi-beam antenna system according to claim 2, wherein the coupler is configured as a parallel coupling line type, a branch coupling type, a lange coupler type, or a matched double T type.
4. The amplitude and phase adjustable multi-beam antenna system according to claim 1, wherein the amplitude weight module (20) comprises a power divider group, a combiner group and a phase shifter group, the power divider group comprising a plurality of power dividers, the combiner comprising a plurality of combiners, the phase shifter group comprising a plurality of phase shifters; the power divider group, the combiner group and the phase shifter group are connected with the signal output end of the coupler cascading module (10); the power divider group, the combiner group and the phase shifter group are connected in a matched manner and are used for realizing integration and redistribution of the signal edge end and the middle end; The phase shifter is used for realizing a fixed phase difference when the signal edge end and the middle end are integrated.
5. The amplitude phase adjustable multi-beam antenna system according to claim 4, wherein the power divider is configured as a Wilkinson power divider or a T-type power divider.
6. The multi-beam antenna system with adjustable amplitude and phase as set forth in claim 1, wherein the phase adjustment module (30) comprises a plurality of phase shifters, wherein the plurality of phase shifters are arranged in a common set of travel phase shifters, and wherein the plurality of phase shifters are multiple phase shifters.
7. The multi-beam antenna system with adjustable amplitude and phase as set forth in claim 6, wherein the phase shifter is a digital phase shifter, a PCB sector phase shifter, a dielectric phase shifter or a U-shaped coupling phase shifter.
8. The amplitude and phase adjustable multi-beam antenna system according to claim 1, wherein N is set to 4 or 8.

Description

Amplitude-phase adjustable multi-beam antenna system Technical Field The invention relates to the field of antennas, in particular to a multi-beam antenna system with adjustable amplitude and phase. Background The multi-beam antenna system has the core of a multi-beam network, the traditional multi-beam network generally adopts an N multiplied by M type butler matrix network, the working principle is that an input radio frequency signal is processed into a signal with equal amplitude and a fixed phase difference and is output to an antenna array to form multi-beams, but the traditional butler matrix network has the inherent defects that the amplitude-phase relationship among output ports is a fixed value, the amplitude and the phase cannot be independently regulated, so that only the multi-beams with fixed pointing can be realized after the multi-beam antenna system is cascaded with the antenna array, the scanning of the multi-beams in a space range cannot be realized, the amplitude-phase parameters of the beams cannot be regulated according to actual scenes so as to realize the side lobe suppression or main lobe bandwidth regulation, and the dynamic communication channel and the multi-user coverage requirement cannot be adapted. In order to solve the problems of the traditional Butler matrix network, an improvement scheme based on the Butler matrix is provided in the prior art, for example, a phase compensation circuit is additionally arranged behind the Butler matrix, the beam pointing to the front is realized through the integral phase deflection, meanwhile, a power distribution circuit is additionally arranged to distribute the power of an inner antenna unit to an outer antenna unit so as to improve the side lobe suppression effect, but the improvement scheme is not separated from the core constraint of the Butler matrix, only global phase compensation of radio frequency signals can be realized, independent amplitude and phase adjustment can not be performed on a single output port, the beam pointing is still in a fixed form, no beam scanning capability is provided, the side lobe suppression can only realize limited promotion by increasing hardware expansion modes such as the outer antenna unit, the amplitude weight can not be dynamically adjusted so as to adapt to different interference scenes, the port number of the Butler matrix is in a fixed 2 n form, the expansibility is poor, the two-dimensional or multi-dimensional multi-beam network can not be realized through module stacking, the spherical beam scanning coverage requirement of 6G communication is difficult to be met, meanwhile, the extra power consumption of hardware is increased, the complexity, the antenna system is also caused, the cost is not easy to realize. In summary, the existing multi-beam antenna system cannot realize independent adjustment of the amplitude phase of an output port no matter in a traditional butler matrix scheme or in an improved scheme based on the butler matrix, has the problems of missing beam scanning capability, limited side lobe suppression and bandwidth adjustment effects, poor expansibility, single adaptation scene and the like, and is a technical problem to be solved in the field. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a multi-beam antenna system with adjustable amplitude and phase. The technical scheme adopted by the embodiment of the invention for solving the technical problems is that the amplitude-phase adjustable multi-beam antenna system comprises N input ports, N output ports, a coupler cascade module, an amplitude weight module and a phase adjusting module which are sequentially cascaded, wherein N is an integer greater than or equal to 2; The signal input end of the coupler cascade module is connected with N input ports, the signal output end of the coupler cascade module is connected with the input end of the amplitude weight module, the output end of the amplitude weight module is connected with the input end of the phase adjustment module, and the output end of the phase adjustment module is connected with N output ports; The N input ports are used for being electrically connected with the radio frequency interface, and the N output ports are used for being electrically connected with the antenna array; The coupler cascade module is used for processing the input radio frequency signals into signals with constant amplitude and fixed phase difference and outputting the signals, the amplitude weight module is used for carrying out amplitude weight redistribution on the signals output by the coupler cascade module, and the phase adjustment module is used for carrying out phase adjustment on the signals output by the amplitude weight module. As one of the preferred embodiments of the present invention, the coupler cascade module includes a plurality of coupler assemblies cascaded in s