1.9 GHz Compact Low Loss Dielectric Duplexer Designed by Dual Mode Waveguide Transmission Line Method
A new small sized and low loss 1.9 GHz band dielectric duplexer has been developed. 1.9 GHz TM110 dual mode monoblock dielectric resonators, which designed to have much smaller volume (27 cc) and high unloaded Q(5000), have been constructed by using new precise molding techniques. And to insure that we are able to simulate and design optimized electrical performance of the duplexer accurately, we have proposed a dielectric dual mode waveguide transmission line design, method. The duplexer thus designed and manufactured has excellent performanc. The volume is 200 cc, insertion loss is 0.45 dB, and attenuation is 85 dB.
Miniatrzed Dielectric Duplexer Using TM Triple Mode Resonators For 800MFHz Band Cellular Base Station
This paper describes a new technology of very compact 800MHz band dielectric duplexer. We has developed a dielectric TM triple mode resonator, that consists of monoblock high K ceramics. By using this, a much size-reduced dielectric duplexer has been designed and manufactured at 800MHz band. The duplexer which has each 6 poles has elliptic function characteristics and low insertion loss of about 0.8dB, high attenuation of 90dB. The volume is about 222cc, that is 1/5 of conventional cavity duplexer. This duplexer is very useful for cellular base station.
Dielectric High-Power Bandpass Filter Using Quarter-Cut TE/sub 01delta/ Image Resonator for Cellular Base Stations
A dielectric high-power bandpass filter using "Quarter-cut TE/sub 01delta/ Image Resonators" has been developed. This resonator construction has a high unloaded Q over 7000 and also provides a sufficient thermal diffusion path to the metal housing. The insertion loss and the attenuation level of the 8-Pole elliptic function type filter are 0.37 dB and 95 dB respectively. The physical size of the dielectric filter is 280x135x65 (mm), one third to one fifth the volume of conventional cavity resonator filters.