400MHz band elliptic function type miniaturized diplexer using dielectric resonators

A newly designed 400MHz band antenna diplexer has been developed for land mobile communication system. The diplexer has been miniaturized to the volume of about 400cc by using dielectric resonators and the design technic of elliptic function type band elimination filter. The diplexer has high performance for insertion loss, isolation, transmitting power capacity and temperature stability.