Laminated dielectric antenna duplexer and a dielectric filter

Details Laminated dielectric antenna duplexer and a dielectric filter Laminated dielectric antenna duplexer and a dielectric filter

1997-11-07

2000-02-01

Vu, David H.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333219, H01P 1203

Patent

active

06020799&

ABSTRACT:
A dielectric antenna duplexer used in a high frequency radio device such as a portable telephone, and a dielectric filter for forming the duplexer of the SIR (stepped impedance resonator) composed by cascade connection of first transmission lines having one end grounded and second transmission lines having one end open and lower in characteristic impedance than in the first transmission lines, first transmission lines and second transmission lines are individually coupled in electromagnetic field, thereby forming an antenna duplexer and a dielectric filter of small insertion loss, high bandwidth selectivity, excellent band pass characteristic, and low cost.

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