SWR Measurement Instrument Circuit Implementation

摘要

In this paper, we proposed a transmission line SWR measurement instrument circuit that is based on Wheatstone bridge. We analyzed the principle of SWR and described an improved Wheatstone bridge circuit. Hardware circuit works in short-wave band between 2-30MHz. Also we analyzed the hardware system errors and demonstrated the calibrated solution way in software, which allows us to achieve a good measurement result.