Title :
High isolation and compact size microstrip hairpin diplexer
Author :
Srisathit, Sarayut ; Patisang, Sumongkol ; Phromloungsri, Ravee ; Bunnjaweht, Sawat ; Kosulvit, Sompol ; Chongcheawchamnan, Mitchai
Author_Institution :
Res. Centre of Electromagn. Wave Applic., Mahanakorn Univ. of Technol., Bangkok, Thailand
Abstract :
Since conventional microstrip hairpin filter and diplexer are inherently formed by coupled-line resonators, spurious response and poor isolation performance are unavoidable. This letter presents a simple technique that is suitable for an inhomogeneous structure such as microstrip to cure such poor performances. The technique is based on the stepped impedance coupled-line resonator and is verified by the experimental results of the designed 0.9GHz/1.8GHz microstrip hairpin diplexer.
Keywords :
microstrip filters; microstrip lines; microstrip resonators; multiplexing equipment; 0.9 GHz; 1.8 GHz; isolation performance; microstrip hairpin diplexer; microstrip hairpin filter; spurious response; stepped impedance coupled line resonator; Band pass filters; Coupling circuits; Impedance; Microstrip filters; Microstrip resonators; Radio frequency; Resonator filters; Topology; Transmission lines; Wireless communication;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.842839
