NDLI: Design of compact notched UWB filter using coupled external stepped-impedance resonator

Content Provider	IEEE Xplore Digital Library
Author	Chun-Ping Chen Takakura, Y. Nihie, H. Zhewang Ma Anada, T.
Copyright Year	2009
Description	Author affiliation: Graduate School of Science and Engineering, Saitama University, 225 Ookubo,Saitama-ken, 338-8570, JAPAN (Zhewang Ma) \|\| Department of Electronics and Informatics Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohamashi, 221-8686, JAPAN (Chun-Ping Chen; Takakura, Y.; Nihie, H.; Anada, T.)
Abstract	A compact ultra-wideband (UWB) bandpass filter (BPF) with a controllable notch band is proposed and implemented for the application in UWB wireless communication system. In terms of a recently-proposed filter synthesis theory, a short-circuited-stub-loaded multi-mode resonator based UWB filter is designed to create an ultra-wide passband, within which a narrow notch (rejection) band is introduced by an external coupled stepped-impedance resonator (SIR). The location of the notch band is controlled by the proper selection of the high-low impedance ratio and electric length of the SIR. A simulative investigation exhibits that the external SIR is able to create narrower notch band than other conventional techniques, such as open-circuited stubs, spur-lines and embedded inline stubs. In addition, since the distortion of the filter characteristics, introduced by the external SIR at non-resonance frequencies, can be neglected, the proposed UWB notch filter can be implemented by the design of UWB BPF and external SIR respectively. As an example, an FCC UWB filter (BW: 3.1∼10.6GHz) with a WLAN notch band was designed, simulated and fabricated. A very good agreement between the measured and predicted filter characteristics validated the proposed filter prototype and corresponding design theory.
Starting Page	945
Ending Page	948
File Size	903873
Page Count	4
File Format	PDF
ISBN	9781424428014
DOI	10.1109/APMC.2009.5384326
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-12-07
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resonator filters Band pass filters Filtering theory Communication system control Ultra wideband technology Control systems Wireless communication Control system synthesis Passband Impedance ultra wideband (UWB) Microstrip filters notched band filters bandpass filter
Content Type	Text
Resource Type	Article

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