Design Of The Detecting And Control System For The Short-wave Antenna Tuning Circuit

In recent years,radio communication technology is developing at an incredible speed.Short-wave communication is widely used in the sphere of military affairs,maritime aviation and meteorology areas with its special advantages of remote transmission,small size and extremely excellent mobility.Antenna feeder is an important part of short-wave communication.The transmission signal and feed network can achieve a good match by tuning technology.Tuning technology can improve the quality of communication.So we design a detecting and control system for automatic tuning circuit based on adjustable inductance and standing wave ratio in this thesis.The design scheme of the detecting and control system for the short-wave antenna tuning circuit is given.The hardware system is designed with MSP430 as the core,including the circuit of micro controller module,DDS signal source module,standing wave detecting module,stepping motor drive module,power supply module and so on.The software flow of the micro controller,including reset command processing,automatic tuning command processing,manual tuning command processing,work command processing and other program modules is given in this thesis.It achieves the function of feed network automatic tuning and manual tuning by the control of the step motor sports and standing wave ratio test.At the same time,we design a interface of upper computer software,which realizes the communication of the upper computer and detecting and control system for the short-wave antenna tuning circuit and the real-time display of the standing wave ratio.Finally,through the actual testing of detecting and control system for the short-wave antenna tuning circuit,the results show that the system has reached the design requirements.