Development Of Transceiver Components For Three Millimeter Wave All-solid-state Radar Systems

Millimeter wave radar is widely used in intelligent transportation,weather detection,weapon guidance and inter-satellite communication.94 GHz is one of the atmospheric windows in millimeter-wave band,and its wavelength is equivalent to the size of cloud particles,so the 3mm radar has great application value in the field of meteorological observation.3mm radar is a hot and difficult point in current research,and its related advanced technologies and equipment have been blocked and embarrassed by developed countries such as Europe and America.In this international background,in order to enrich the domestic meteorological detection methods,a functional prototype of 3mm radar T/R module(hereinafter referred to as the prototype)based on the W-band MMIC chip which can be produced independently in China is designed in this paper.According to the actual demand of meteorological observation,the quasi-continuous wave system of the prototype is determined in this paper,and the receiver of the prototype adopted a dual-channel quadratic conversion superheterodyne receiver.In order to facilitate the testing of the prototype,the prototype is divided into 10 modules.The task of this paper is to complete the design and test of the prototype’s 10 modules.Aiming at the difficulties in the design,this paper puts forward its own solutions.First,to solve the problem of long simulation time and low optimization efficiency of W-band waveguide filter,this paper combined pattern matching method and HFSS simulation tool to solve the W-band filter.Under the premise of guaranteeing the simulation accuracy,the design efficiency is greatly improved.Second,to meet the need of miniaturization of the filter used in the first IF,a new dual-stub loaded filter is proposed,which has the advantages of small size,large bandwidth and strong frequency selectivity.The test results show that passive modules such as filters and power divider all meet the design standards.In the test of the active modules,the drive amplifier module,the frequency multiplier module and the IF amplifier module all meet the design standards except the channel-1 of low noise amplifier module and frequency conversion modules.