Title :
A Millimeter-Wave UWB BPF Using Novel Microstrip Dual-Mode Ring Resonators with Stepped-Impedance Coupling Stuctures
Author :
Ma, Zhewang ; Cai, Peng ; Kobayashi, Yoshio ; Hiramoto, Masanobu ; Kanzaki, Hitoshi
Author_Institution :
Sch. of Sci. & Eng., Saitama Univ., Saitama
Abstract :
In this paper, a novel millimeter-wave ultra-wideband (UWB) bandpass filter having a midband frequency of 26.5 GHz and a 3 dB bandwidth of 3.4 GHz is developed by using microstrip dual-mode rectangular ring resonators. Resonant properties of the microstrip dual-mode rectangular ring resonator are analyzed by using an electromagnetic simulator, and stepped- impedance parallel-coupled feed lines are invented in order to realize strong coupling between the input/output lines and the dual-mode ring resonators. The dual-mode ring resonators produce multiple transmission zeros in the stopband of the filter, as a consequence, the filter exhibits sharp attenuations near its passband, and very wide stopbands. The filter is compact in size and low-loss in passband. The measured frequency property of a fabricated filter shows favorable agreement with the predicted response.
Keywords :
band-pass filters; microstrip resonators; millimetre wave filters; microstrip dual-mode ring resonators; millimeter-wave ultra-wideband bandpass filter; stepped-impedance coupling; Band pass filters; Bandwidth; Electromagnetic coupling; Frequency; Microstrip filters; Microstrip resonators; Optical ring resonators; Passband; Resonator filters; Ultra wideband technology; Ultra-wideband bandpass filter; dual-modes; microstrip ring resonator; transmission zeros;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4555162
