Low loss triplexer design for high power application in radars

The low loss design of input and output triplexers for high power application is presented. The input triplexer is realized as a microstrip structure, which consists of three third order filters and a star-junction. For the output triplexer design, it is suggested to use a combination of the microstrip star-junction and three interdigital cavity filters. Both structures provide a low insertion loss level and low cost manufacturing.