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Broadband Butler matrix feed network with frequency-variable phase difference

A technology of Butler matrix and feeding network, which is applied to specific array feeding systems, circuits, electrical components, etc., can solve problems such as narrow bandwidth electronically controlled phase shifters, and achieve light weight, good application prospects, and simple processing Effect

Active Publication Date: 2021-07-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through this simple design method, they are increased from 4 beams to 16 beams from the original traditional 4×4 Butler matrix, but the operating bandwidth is very narrow and many electronically controlled phase shifters are required

Method used

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  • Broadband Butler matrix feed network with frequency-variable phase difference
  • Broadband Butler matrix feed network with frequency-variable phase difference
  • Broadband Butler matrix feed network with frequency-variable phase difference

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] see figure 1 and figure 2 As shown, the broadband Butler matrix feeder network with phase difference and frequency variation provided by this embodiment includes an upper ground metal plate 06, an upper dielectric substrate 03, an intermediate dielectric substrate 04, and a lower dielectric substrate stacked in sequence from top to bottom. The substrate 05 and the lower ground metal plate 07, wherein the upper dielectric substrate 03 and the lower dielectric substrate 05 have the same thickness, and the intermediate dielectric substrate 04 has a thickness smaller than the upper dielectric substrate 03 and the lower dielectric substrate 05;

[0029]The intermediate layer dielectric substrate 04 is provided with the first input port 11, the second input port 12, the third input port 13 and the fourth input port 14 of the feed network, and the first output port 21 and th...

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Abstract

The invention discloses a broadband Butler matrix feed network with frequency-variable phase difference. According to the invention, the working range of the feed network is 2-4 GHz, and the feed network is provided with four input ports, four output ports, two three-section couplers, four broadband couplers, three cross networks, two phase compensators, two 45-degree phase shifters and six broadband phase shifters, wherein two of the input ports are connected with a matched load, and the other two of the input ports feed independently; when a frequency is changed from 2 GHz to 4 GHz, signals with equal amplitude and with a phase difference that changes from + / - 45 degrees to + / - 90 degrees can be output; and a change process is close to a linear change, and the working frequency range of the feed network exceeds one frequency multiplication. According to the invention, phase difference frequency change is achieved through power synthesis, the radiation characteristic that an antenna array beam direction is stable is achieved, and the whole feed network is simple and compact in structure, easy to machine, light in weight, low in machining cost, wide in working bandwidth and good in application prospects.

Description

technical field [0001] The invention relates to the technical field of communication antennas, in particular to a wideband Butler matrix feeding network with frequency-variable phase difference. Background technique [0002] With the popularization of 5G technology, the advent of the Internet of Vehicles and the Internet of Things, it marks that wireless technology will usher in a peak period of vigorous development. On the other hand, with the rapid development of electronic information, more and more devices will be connected to wireless communication networks. With the limitation of spectrum resource and bandwidth, improving the capacity of wireless communication system is a hotspot of people's research. Multi-beam antennas are widely used in wireless communication systems due to their multi-directional high-gain characteristics and the ability to generate different beams pointing in different directions with the same radiation aperture. At present, the main technology ...

Claims

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Application Information

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IPC IPC(8): H01Q3/40H01Q21/00
CPCH01Q3/40H01Q21/0006
Inventor 陈付昌向凯燃
Owner SOUTH CHINA UNIV OF TECH
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