This is a study for the development of a diplexer for Navy Bouy application. Approaches to the diplexer are a receive band-pass and a transmit band-stop filter with a diplexing circuit. These are designed using lumped components or transmission lines. Preliminary analysis shows that for the transmit filter, a transmission line band-stop filter using cross-coupling can meet the Navy requirements. For the receive filter a rod coupled filter using cross-coupling will also meet the Navy requirements. The band-stop filter can be a surface mount structure and thus will meet the shock requirement of 55 G's. For the receive filter, foam filling and rugged design can be used to meet the shock requirement.
Keywords: Band-Stop, Band-Pass, Diplexer, Cross-Coupling, Shock-Resistant Filters
