Design Of Broadband Large Dynamic Instantaneous Frequency Measurement Receiver Channel

Broadband Large Dynamic Instantaneous Frequency Measurement Receiving Channel belongs to passive radar guidance system,the system indexes are mainly determined by the quality of its performance indexes.The topic of the thesis is to develop and manufacture the broadband large dynamic instantaneous frequency measurement receiving channel that can meets the system requirements.This thesis combines the development of this field at home and abroad.According to the needs of actual engineering and compare several common receiving scheme and frequency measurement scheme,a detail design method of broadband large dynamic instantaneous frequency measurement receiving channel that based on superheterodyne reception and the delay line of phase demodulation to measure frequency is proposed.According to the requirements of the total requirements of technical indicators,this thesis divides the design of broadband large dynamic instantaneous frequency measurement receiving channel into two parts:the broadband receiving channel module and instantaneous frequency measurement module.Besides,the thesis lays special stress on index decomposition,index calculation and simulation of the two parts detailedly.In the design of broadband receiving channel module,we analyze and calculate every index that include noise factor and sensitivity.And we divide the module design into three parts: RF front-end module,automatic gain control module and phaselocked loop module.At the same time,we expound the three parts in detail refers to the component data that we use.In the IFM module design,this thesis expounds the main functions,index calculation,program realization,actual frequency test and related discussion of the module.And the index calculation focuses on the calculation and simulation of the delay line,the calculation of the frequency to be measured and the calculation of the frequency precision.In the actual frequency test part,in order to test and verify the correctness of this design,it is necessary to input standard continuous wave signal from the signal source.So far,the thesis has completed part design and debug,and the datas meet the technical requirements.