INTEGRATED DUAL BAND DIELECTRIC DUPLEXER

摘要

PURPOSE: An integrated dual band dielectric duplexer is provided to reduce manufacture cost and size of a handheld phone. CONSTITUTION: An integrated dual band dielectric duplexer comprises a dielectric block(D20), a first duplexer, a second duplexer(22), a common antenna, a first transmission line and a second transmission line. The first duplexer and the second duplexer(22) are formed in the dielectric block(D20) such that opposite surfaces of their open surfaces are opposite to each other. The first duplexer includes many resonators(R11-R18) having holes passing from the open surface to the rear surface of the block(D20) and having an inner surface coated with conductive material. The resonators(R11,R18) at both ends function as a band reject filter and remaining resonators(R12-R17) function as a band pass filter. The second duplexer(22) includes many resonators(R21-R30). The resonators(R21,R30) at both ends function as a band reject filter and remaining resonators(R22-R29) function as a band pass filter.