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.
Compact duplexer using capacitive loaded dual mode resonator for GSM microcellular base station
This paper describes a compact dielectric resonator duplexer for GSM microcellular base station. A new size-reduced capacitive loaded TM dual mode resonator that consist of monoblock high K ceramics is proposed. The electrical performance of the duplexer is designed by using elliptic type equivalent circuit method. A 6 pole type duplexer at 900 MHz band is manufactured. It has low insertion loss of 1.1 dB, high attenuation of 58 dB. The volume is about 318 cc that is 1/3 of conventional cavity type.
4GHz Band Band-Pass Filter using an Orthogonal Array Coupling TM110 Dual Mode Dielectric Resonator
A novel TM110 dual mode resonator using a monoblock ceramic was developed. The coupling principle of the resonator is explained by even and odd mode, and the design procedure is expressed. The trial 4GHz band band-pass filter is 12×12×30mm in the size, and shows 0.2dB in the insertion loss for the bandwidth of 500MHz and 0.35MHz in the temperature stability.