Study Of High-power Microwave Effects And Mechanism On Microwave Receivers

Microwave receiver is a very important part of wireless communication system.It is widely used in navigation systems,radar systems,missile guidance systems,and is a typical target of high-power microwave(HPM)by 'front door'.At present,there are many researches on the high-power effects of device-level PIN limiter,low-noise amplifier and limiter,and there are few reports on the high-power microwave effect and mechanism of component-level microwave receivers.Understanding and mastering the microwave power effect and mechanism of high-power microwave receivers is very important for high-power microwave technology in receivers of communication systems.This thesis focuses on the HPM effect and mechanism of microwave receivers and radiation experiments.First,it briefly introduces the research background and significance of the topic,domestic and international trends,related research tools and methods;Secondly,the HPM effect of microwave receiver is studied by means of theoretical simulation and experiment.In order to simulate the transient thermal damage effect of sensitive devices under the action of high-power microwave pulses,the thermoelectric and electrical analogy method is used to realize the effect of HPM effect.The coupled calculation of the physical processes,the HPM damage effect circuit model,and the effect simulation under different microwave pulse parameters were performed.Thirdly,based on the circuit simulation model,the microwave receiver effect samples were designed and fabricated,including S-band filters,PIN limiters,low noise amplifiers,mixers,and IF amplifier modules,and the operating parameters were tested.To meet the requirements of experimental indicators of radiation effects;Finally,an S-band HPM irradiation effect experimental platform was set up,and four experimental power points of 420 kW,1 MW,4.5 MW,and 10 MW were selected to carry out irradiation experiments.Statistical analysis of the effect data was conducted and compared with the simulation results.Effect experiments and simulations show that under a single-band S-band HPM,the damage power from the front-door coupled into the receiver front-end circuit with limiting protection structure needs to be more than 80dBm(hundreds of kilowatts);under the action of multiple repetitive pulses,Typical pulse damage cumulative effect characteristics.