Title :
Novel microstrip bandpass filter with controllable transmission zeros
Author :
Zhang, Long ; Yu, Zhi-Yuan ; Mo, Shao-Guo
Author_Institution :
Inst. of Appl. Phys., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper presents a bandpass filter using a novel single dual-mode resonator. The resonator with notch perturbation is investigated. The transmission zeros and current distribution are discussed. The location of the transmission zeros are shifted by changing the position of input/output ports and the size of circular notch. Different selectivity in stopband can be realized by the filter. Based on the proposed dual-mode resonator, an asymmetrical frequency responses filter at center frequency of 2.4 GHz is implemented with two transmission zeros. The measured results exhibit good agreement with the simulation.
Keywords :
band-pass filters; current distribution; frequency response; microstrip filters; notch filters; resonator filters; asymmetrical frequency response filter; circular notch; controllable transmission zeros; current distribution; frequency 2.4 GHz; microstrip bandpass filter; notch perturbation; selectivity; single dual-mode resonator; stopband filter; Band pass filters; Current distribution; Feeds; Filtering theory; Frequency; Geometry; Microstrip filters; Passband; Physics; Resonator filters; Microstrip filter; circular notch; controllable transmission zeros; dual-mode;
Conference_Titel :
Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications, 2009 3rd IEEE International Symposium on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-4076-4
DOI :
10.1109/MAPE.2009.5355857
