A study of cancelling the leakage signal with a RPC for single antenna LFMCW radar altimeter

To fulfill the practical demands of airborne equipment's miniaturization and integration, topic around single antenna radar altimeter become one hot topic. But the problem of leakage signal greatly limits its applied scope. To solve this problem, first, carry out qualitative analysis on the leakage single of the single antenna altimeter; secondly, apply the Reflected Power Canceller(RPC) to the receiver of the altimeter system, and then propose the optimized design; then, a detailed analysis and deduction of the RPC's working process is given; finally, simulation of the cancellation performance is carried out, and the results indicate that the effect on cancelling is significant.