Title :
Novel synthesis methodology for ultra-wideband filters based on frequency transformation technique
Author :
Chen, Chun-Ping ; Iinuma, Ryouhei ; Takahashi, Junya ; Ma, Zhewang ; Anada, Tetsuo ; Takeda, Shigeki
Author_Institution :
Dept. of Electron. & Inf. Eng., Kanagawa Univ., Yokohama, Japan
Abstract :
A novel methodology is proposed for the design of ultra-wideband filters by the combination of the transmission-line-theory-based frequency-transformation technique to a recently-proposed Chebyshev-filter-based synthesis technique. Firstly, the frequency-transformation technique is mathematically formulated and applied to the basic distributed transmission-line elements - short-circuited shunt stubs, open-circuited series stubs and unit elements. Then, the procedure of the filter synthesis is described in detail and demonstrated by designing an example filter with an FBW of 67%. For confirmation, the designed filter is optimized by an EM simulator, practically fabricated and then characterized by a network analyzer. The measured results are compared with the simulated ones and the theoretical ones. Good agreements are found and the correctness and effectiveness of the proposed technique are validated accordingly.
Keywords :
Chebyshev filters; ultra wideband technology; Chebyshev filter-based synthesis technique; EM simulator; distributed transmission line elements; frequency transformation technique; network analyzer; open-circuited series stubs; short-circuited shunt stubs; transmission line theory; ultrawideband filter design; unit elements; Band pass filters; Equivalent circuits; Filtering theory; Microwave filters; Passband; Ultra wideband technology; Wideband;
Conference_Titel :
Microwave Conference (EuMC), 2011 41st European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-235-6