Design And Implementation Of A Wideband Superheterodyne Array Receiver

With the development of science and technology,the use of wireless communication equipment is becoming wider and wider.While bringing convenience to people's life,it also brings severe challenges to radio supervision.The signal receiver is used as the receiving front end in the radio supervision equipment,and its performance is crucial to the monitoring effect.According to actual needs,this paper analyzes and implements a wideband superheterodyne array receiver.The main work content includes the following points:(1)Based on the common structure of the receiver,a superheterodyne structure is selected for the performance index requirements of the receiver as the basis for the design and research of this article.On this basis,it analyzes how to realize a signal receiver with strong anti-interference ability,high receiving sensitivity and large dynamic range.(2)Based on the superheterodyne double frequency conversion structure,the specific link design of the receiver is given,and the frequency band preselector is simulated,tested and optimized.The feasibility of the receiver design is verified by simulation,and then the realization process of the receiver is described from two aspects: radio frequency circuit design and receiver configuration.(3)In radio monitoring-related algorithms,in many cases it is required to use an array receiving front-end instead of a single receiver.Based on the performance requirements of a single receiver,the receiver array needs to further consider the problem of channel consistency and crosstalk between channels.This paper presents a specific solution to the channel consistency problem,and carries out a simulation analysis around the crosstalk problem between channels.From the PCB design level,the design points to reduce the crosstalk between channels are put forward.(4)Based on the analysis in this article,an eight-receiving channel array receiver is realized.Tests show that the receiver has a frequency range of 9k Hz?6GHz,a receiving sensitivity of-100 dBm,and a dynamic range of 60 dB.