Title :
Multi-transmission-zero quad-band bandpass filter based on quad-mode resonator
Author :
Tsou, Ming-Ju ; Tu, Wen-Hua
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan
Abstract :
A sharp-rejection quad-band microstrip bandpass filter with five transmission zeros is proposed. The bandpass filter consists of a quad-mode resonator and two triple-line feeding lines. Analysis on how to control the passband frequencies and the transmission zero frequencies is given. The four passbands are at 1.6 / 2.3 / 3.1 / 5 GHz with the insertion loss of less than 1.2 / 2.2 / 1.2 / 2.3 dB and the return loss of greater than 22 / 14 / 21 / 16 dB. Furthermore, the five transmission zeros are evenly distributed beside the passbands at 1.3, 2.1, 2.7, 4.1, and 6.1 GHz.
Keywords :
band-pass filters; resonators; five transmission zeros; insertion loss; multitransmission-zero quad-band bandpass filter; passband frequencies; quad-mode resonator; return loss; sharp-rejection quad-band microstrip bandpass filter; transmission zero frequencies; triple-line feeding lines; Band pass filters; Filtering theory; Microstrip filters; Microwave filters; Passband; Resonant frequency; Resonator filters; Bandpass filter; quad-mode resonator; transmission zeros;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
