Duplexer based on a cavity resonators for PSR

This paper deals with a design of a frequency duplexer based on a cavity resonator for a primary surveillance radar. The duplexer in this radar system for receiving of two different frequencies is used. Using of two different frequencies allows us achieve a greater system reliability. The proposal of frequency duplexer is based on a cavity resonator. Design and optimization of the duplexer was performed in a CST Microwave Studio. After designing and optimizing, the final circuit was fabricated and required parameters were verified by a measurement.