Method for optimizing dynamic gain of liquid crystal microwave phased-array antenna

Abstract

The invention discloses a method for optimizing the dynamic gain of a liquid crystal microwave phased-array antenna, which is applied to the field of liquid crystal microwave electronic devices and aims at solving the problem that the wave beam control efficiency of the liquid crystal microwave phased-array antenna is reduced due to factors such as a return zone and a process error in the prior art, so that the microwave signal transmission loss of a system is increased. According to the invention, a microwave signal emitted by a microwave transmitter is deflected by a liquid crystal phased array; microwave signals are acquired by the receiving antenna and are transmitted to a PC through a vector network analyzer; gain calculation is performed on the acquired microwave signals through a particle swarm algorithm, and the control voltage of the liquid crystal phased array antenna is optimized; a beam controller FPGA converts the voltage into a voltage code to be loaded on the liquid crystal phased array antenna; liquid crystal deflection is controlled to reduce the influence of the liquid crystal fringe effect and the process error, and it is guaranteed that the performance of the liquid crystal phased array antenna is improved.

Description

technical field [0001] The invention belongs to the field of liquid crystal microwave electronic devices, in particular to an optimized phase control technology for liquid crystal microwave electronic devices. Background technique [0002] Liquid crystal microwave phased array antenna technology is a non-inertial, multifunctional real-time programmable electronically controlled beam scanning technology. The core device uses nematic liquid crystal as a tunable material for phase modulation, which has physical characteristics such as low driving voltage and large depth of phase modulation. At the same time, the device has the advantages of light weight, small size, low power consumption and easy implementation of microelectronic control circuits. , which not only solves the problems of fast pointing, flexible control and space scanning of microwave phased array antennas, but also makes the microwave system more integrated, with stronger flexible control capabilities and lower ...

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Problems solved by technology

Since the signal power is dispersed to other orders, it will inevitably cause the reduction of the main lobe power

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