A compact diplexer for telemetry and telecommand transmit-receive system for space applications

The presented work details design of a compact diplexer for space applications. The proposed diplexer is destined for on-board S-band telemetry and tele-command transmit-receive system. Such an application dictates stringent requirements, of performance and compactness, over the design of components. The design offers compactness and will reduce the requirement of two antennas to one dual-band transmit-receive antenna. The proposed design is based on rod resonator waveguide filters. The required isolation between the transmit/receive channels is achieved through the efficient use of cross couplings. The paper focuses on simulation, optimization, and implementation of the design.