Title :
A diplexer using modified stepped-impedance resonators
Author :
Yang, Ru-Yuan ; Hung, Cheng-Yuan ; Hsiung, Chin-Min ; Lin, Chih-Chin
Author_Institution :
Dept. of Mater. Eng., Nat. Ping-Tung Univ. of Sci. & Technol., Neipu Township, Taiwan
Abstract :
We presented a high performance diplexer is designed and fabricated for Global System for mobile communications (GSM) applications in this paper,. Two square open-ring bandpass filters (BPFs), operated at 0.9 GHz and 1.8 GHz, and are used for the diplexer mainly. The size reduction, the deep and wide stop-band from 0.51 GHz to 4.9 GHz can be obtained when modifying the stepped-impedance resonator (SIR) in the BPFs, The improved passband selectivity is obtained since several transmission zeros are located at the passband edges The simulated and measured results have a good agreement with the proposed design concept.
Keywords :
band-pass filters; cellular radio; multiplexing equipment; resonators; BPF; GSM; SIR; diplexer; frequency 0.51 GHz to 4.9 GHz; frequency 0.9 GHz; frequency 1.8 GHz; global system for mobile communication; open-ring bandpass filter; passband selectivity; stepped-impedance resonator; transmission zero; Resonator filters; Bandpass filter (BPF); diplexer; isolation; stepped-impedance resonator (SIR);
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
