Title :
Design method of X band coaxial duplexer
Author :
Qiang, Wei ; Ying, Huang ; Bin, Wang ; Jinsong, Tang
Author_Institution :
Sichuan Inst. of Piezoelectr. & Acousto-Opt. Technol., Chongqing, China
Abstract :
Based on the design of the general Chebyshev bandpass filter with finite transmission zeros, the filter simulation model has been established according to the calculated couple matrix. Combining EM software with an optimization method, the size of the duplexer has been optimized and designed by using the group delay fitting method. The test results show that the insertion loss of the proposed duplexer is less than 1.5 dB, the VSWR is less than 1.5, the band-stop-rejection is greater than 85 dB. The measured curves agree well with the design specifications and the correctness of this method has been verified.
Keywords :
Chebyshev filters; band-pass filters; microwave filters; multiplexing equipment; poles and zeros; Chebyshev bandpass filter; EM software; band-stop-rejection; coaxial duplexer; filter simulation model; group delay fitting method; insertion loss; optimization method; transmission zeros; Cavity resonators; Couplings; Delay; Integrated circuit modeling; Microwave circuits; Microwave filters; Optimization; co-simulation; couple matrix; duplexer; general Chebyshev filter;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2012 International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-2184-6
DOI :
10.1109/ICMMT.2012.6230257
