Design of HF Wideband High Dynamic Range Receiver Channel

According to the requirement of modern electronic reconnaissance system,a short wave wideband digital reconnaissance receiver is designed based on the state of arts engineering implementation techniques.The architecture and features of the analog forepart circuit with wide dynamic range and high linearity are discussed.It must be weighed that the noise figure,gain and dynamic range,and all elements of the configuration must be chose carefully.The method of parameters allocation and optimization of the analog forepart circuit are studied.This paper presents a method for improving dynamic range by means of Automatic Gain Control system.There are some innovations in the design of high linearity and high dynamic range,also in the circuitry realization.It is proved that the device has a dynamic range of 85dB by experiments.The device satisfies electronic reconnaissance system's needs.