Title :
Quarter-wavelength resonator bandpass filter with wide stopband using discriminating coupling
Author :
Li, Yuan Chun ; Zhang, Xiu Yin ; Xue, Quan
Author_Institution :
State Key Lab. of Millimeter Waves, City Univ. of Hong Kong, Kowloon, China
Abstract :
A simple quarter-wavelength bandpass filter (BPF) with wide stopband is proposed. The harmonic suppression is achieved by discriminating coupling. Using an appropriate coupling region, coupling coefficient at the third harmonic is almost zero whereas that in the passband can be tuned to the desired value. An example filter is designed, manufactured and tested. The measurements show 20-dB rejection level from 1.16f0 to 6f0. It confirms the feasibility of the method.
Keywords :
band-pass filters; band-stop filters; coupled circuits; resonator filters; appropriate coupling region; discriminating coupling; harmonic suppression; quarter-wavelength resonator bandpass filter; third harmonic; wide stopband; Band pass filters; Couplings; Harmonic analysis; Microstrip filters; Microwave filters; Power harmonic filters; Resonator filters; Bandpass filter (BPF); discriminating coupling; harmonic suppression;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
