Prediction and test research on isolation between transmitting and receiving station for distributed radar

Isolation between transmitting and receiving station for distributed radar is a key factor for determination of station sites. The appropriate sites can avoid direct wave interference from the transmitting station to the receiving station. This paper analyzes mechanisms of trans-horizon radio waves propagation. Isolation between transmitting and receiving station in typical western China region was predicted by using the ITU recommendations relevant to radio waves propagation and empirical formula of troposcatter propagation, and test validation was carried out. Prediction and test results show that the troposcatter propagation is dominant when the separation distance between two stations is above several hundred kilometers. Test results also show that the appropriate mountain obstacles can effectively increase the isolation between transmitting and receiving station, and at the same time the diurnal variation of isolation is obviously decreased.