UWB Bandpass Filter Using Microstrip-to-CPW Transition With Broadband Balun

Author

Baik, Jung-Woo ; Lee, Tae-Hak ; Kim, Young-Sik

Author_Institution

Korea Univ., Seoul

Volume

17

Issue

12

fYear

2007

Firstpage

846

Lastpage

848

Abstract

A novel ultra-wideband bandpass filter (BPF) is presented using a back-to-back microstrip-to-coplanar waveguide (CPW) transition employed as the broadband balun structure in this letter. The proposed BPF is based on the electromagnetic coupling between open-circuited microstrip line and short-circuited CPW. The equivalent circuit of half of the filter is used to calculate the input impedance. The broadband microstip-to-CPW transition is designed at the center frequency of 6.85 GHz. The simulated and measured results are shown in this letter.

Keywords

baluns; band-pass filters; coplanar waveguides; electromagnetic coupling; microstrip lines; ultra wideband technology; UWB bandpass filter; broadband balun; electromagnetic coupling; microstrip-to-CPW transition; open-circuited microstrip line; short-circuited CPW; ultra-wideband bandpass filter; Band pass filters; Coplanar waveguides; Electromagnetic coupling; Electromagnetic waveguides; Equivalent circuits; Frequency; Impedance matching; Microstrip filters; Ultra wideband technology; Waveguide transitions; Bandpass filter (BPF); broadband balun; micro strip-to-coplanar waveguide (CPW); transition; ultra-wideband (UWB);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2007.910480

Filename

4385731