Title :
A novel compact high-performance microstrip 26GHz ultra-wideband (UWB) bandpass filter for vehicle radar systems
Author :
Ma, Zhewang ; Ohira, Masataka ; Chen, Chun-Ping ; Anada, Tetsuo
Author_Institution :
Grad. Sch. of Sci. & Eng., Saitama Univ., Saitama, Japan
Abstract :
A novel compact quasi-millimeter-wave UWB bandpass filter (BPF) with a midband frequency of 26 GHz and a fractional bandwidth of 20% is developed for automotive radar systems. Based on the even- and odd-mode method, analytical closed-form formulas are derived first for accurate design of two microstrip stubs-loaded multi-mode ring resonators with pre-designated bandwidths and multiple transmission zeros in their stopbands. Then a UWB BPF is configured by cascading these two ring resonators and a parallel-coupled step-impedance resonator. The filter exhibits desired wide passband with a minimum measured insertion loss of 1.8dB, sharp attenuations near the passband, and very wide stopband with measured attenuations larger than 30dB over 10-40GHz. The Federal Communications Commission´s UWB indoor limit is satisfied quite well.
Keywords :
band-pass filters; indoor radio; microstrip filters; microwave resonators; millimetre wave radar; millimetre wave resonators; road vehicle radar; ultra wideband communication; ultra wideband radar; UWB BPF; UWB bandpass filter; analytical closed-form formula; automotive radar systems; communication commission UWB indoor limit; compact high-performance microstrip ultrawideband bandpass filter; even-mode method; frequency 10 GHz to 40 GHz; loss 1.8 dB; microstrip stubs-loaded multimode ring resonators; multiple transmission zeros; odd-mode method; parallel-coupled step-impedance resonator; vehicle radar systems; Attenuation; Band pass filters; Filtering theory; Optical ring resonators; Passband; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave Workshop Series on Millimeter Wave Wireless Technology and Applications (IMWS), 2012 IEEE MTT-S International
Conference_Location :
Nanjing
Print_ISBN :
978-1-4673-0901-1
Electronic_ISBN :
978-1-4673-0903-5
DOI :
10.1109/IMWS2.2012.6338212
