Design of Millimeter-Wave Bandpass Filter Using Electric Coupling of Substrate Integrated Waveguide (SIW)

Author

Sai Wai Wong ; Kai Wang ; Zhi-Ning Chen ; Qing-Xin Chu

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

24

Issue

1

fYear

2014

fDate

Jan. 2014

Firstpage

26

Lastpage

28

Abstract

A millimeter-wave (mmW) bandpass filter (BPF) using substrate integrated waveguide (SIW) is proposed in this work. A BPF with three resonators is formed by etching slots on the top metal plane of the single SIW cavity. The filter is investigated with the theory of electric coupling mechanism. The design procedure and design curves of the coupling coefficient (K) and quality factor (Q) are given and discussed here. The extracted K and Q are used to determine the filter circuit dimensions. In order to prove the validity, a SIW BPF operating at 140 GHz is fabricated in a single circuit layer using low temperature co-fired ceramic (LTCC) technology. The measured insertion loss is 1.913 dB at 140 GHz with a fractional bandwidth of 13.03%. The measured results are in good agreement with simulated results in such high frequency.

Keywords

band-pass filters; coupled circuits; millimetre wave filters; substrate integrated waveguides; LTCC technology; SIW cavity; coupling coefficient; design curves; design procedure; electric coupling; filter circuit dimensions; fractional bandwidth; frequency 140 GHz; insertion loss; loss 1.913 dB; low temperature cofired ceramic; millimeter wave bandpass filter; quality factor; substrate integrated waveguide; Band-pass filters; Cavity resonators; Couplings; Frequency measurement; Millimeter wave technology; Q-factor; Substrates; 140-GHz; BPF; LTCC; SIW; millimeter-wave;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2288177

Filename

6689361