Addressable three-dimensional beam scanning liquid crystal microwave phased array and control method

Abstract

The invention discloses an addressable three-dimensional beam scanning liquid crystal microwave phased array and a control method. The addressable three-dimensional beam scanning liquid crystal microwave phased array comprises a layered structure which is composed of microwave radiators, phase shifters, a bias electrode and a power divider from top to bottom, wherein the bias electrode is located on the same layer as the phase shifters and connected to the outer rings of the phase shifters. The addressable three-dimensional beam scanning liquid crystal microwave phased array further comprises a wave controller and an upper computer, wherein the upper computer is connected with and controls the wave controller through a USB line, the electrodes of the phase shifters are connected to the wave controller, and bias voltage is loaded to the electrodes of the phase shifters through the wave controller; the microwave radiators are double-layer broadband microstrip antenna arrays and are respectively etched on the two layers of substrates; and the phase shifter adopts an Archimedes spiral suspended strip line structure etched on a substrate engraved with a liquid crystal groove, and couples a radio frequency signal to an antenna through a gap coupling mode. The addressable three-dimensional beam scanning liquid crystal microwave phased array is low in profile, low in cost and low in power consumption, can be integrated in a small range, achieves wide-angle beam scanning, and can be used for new-generation microwave radar detection and communication.

Description

technical field [0001] The invention relates to microwave phased array technology, in particular to an addressable three-dimensional beam scanning liquid crystal microwave phased array. Background technique [0002] Antenna is an indispensable module of all radio systems, and its performance directly affects the overall performance and application of the system. At present, the widely used antennas can be divided into two categories, one is mechanical scanning antenna, this type of antenna has large geometric size, heavy weight, slow beam scanning speed and high maintenance cost; the other is integrated on the printed circuit board (PCB). A phased array antenna made of a microwave integrated circuit (IC) chip. Compared with antennas based on mechanical scanning, phased array antennas have the advantages of high sensitivity, high tracking accuracy and short response time due to the absence of mechanical servo control mechanisms, but this type of antenna has complex structure...

AI Technical Summary

Problems solved by technology

However, as the line length increases, more wiring space is required, and dense wiring will cause resonance and narrow the operating bandwidth, thereby reducing the phase shift and affecting the beam scanning range

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