Design Of High Frequency Ground Wave Radar Responder

According to the requirement of high frequency ground wave radar's test and the extraction reference of target information in HF ground wave radar, a responder is designed to complete the tasks of radar scaling, multichannel receiver calibration, echo simulation, and target management combining with the secondary radar's work principle.As a device match of the high frequency ground wave radar, the responder' working is correlating with the radar. The paper introduces the method of the HF ground wave radar to pick-up the usable information, gives the detailed scheme to obtain the simulant echo. Bottom on the responder's function, the article analyses the structure of responder, gives the design of circuit.The designs of echo delay, signal modulating, and the synchro controller are explained as the emphases. The devices' theory, structure, and the problem must be pay attention to are expounded. The simulation and the measured results are proposed. Finally, the development of responder and the feasibility of using responder as secondary radar are discussed.