Title :
A novel Nth-order microstrip dual-mode bandpass filter with N+2 transmission zeros
Author :
Shen, Wei ; Yin, Wen-Yan ; Sun, Xiao-Wei ; Wu, Lin-Sheng
Author_Institution :
Center for Microwave & RF Technol., Shanghai Jiao Tong Univ., Shanghai, China
Abstract :
A novel Nth-order microstrip filter with N+2 transmission zeros using two dual-mode resonators is presented in this paper. Two different coupling schemes are obtained by changing couplings between dual-mode resonators and ports. Then, two fourth- and second-order filter characteristics with three and four transmission zeros are obtained correspondingly. The generation mechanism of transmission zeros is interpreted in detail by coupling matrix theory. A microstrip dual-mode filter is designed and fabricated, with good agreement achieved between the measured and the simulated S-parameters.
Keywords :
band-pass filters; matrix algebra; microstrip filters; microstrip resonators; N+2 transmission zeros; Nth-order microstrip dual-mode bandpass filter; S-parameters; coupling matrix theory; dual-mode resonators; fourth-order filter characteristic; second-order filter characteristic; Arm; Band pass filters; Couplings; Filtering theory; Frequency; Microstrip filters; Microstrip resonators; Optical resonators; Resonator filters; Transmission line matrix methods; S-parameters; bandpass filter; coupling matrix; dual-mode resonator; transmission zeros;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5705-2
DOI :
10.1109/ICMMT.2010.5524914
