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

fYear

2012

fDate

18-20 Sept. 2012

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IMWS2.2012.6338212

Filename

6338212