Spurious suppression of a microstrip filter using three types of rectangular PBG loops

Author

Weng, Min-Hung ; Yuan, Ru-Yung ; Huang, Tsung-Hui ; Chen, Han-Jan ; Chen, Wu-Nan ; Houng, Mau-Phon

Author_Institution

Nat. Nano Device Labs., Tainan, Taiwan

Volume

52

Issue

3

fYear

2005

fDate

3/1/2005 12:00:00 AM

Firstpage

487

Lastpage

490

Abstract

A novel microstrip bandpass filter with three types of rectangular, photonic bandgap (PBG) loops on a middle layer was designed and demonstrated using a full-wave electromagnetic (EM) simulator, with the predicted results verified by experiment. This investigation presents the configurations of conventional parallel-coupled 2 GHz filters with arid without a PBG. The middle-layer of PBG loops adds an extra stopband-rejection mode to filter stop-band; and it provides attenuation in excess of 25 dB at the second, third, and fourth harmonics, thus demonstrating that superior stopband characteristics at high frequency can be obtained using the proposed PBG loops in microwave filters.

Keywords

band-pass filters; electromagnetic wave absorption; microstrip filters; microwave filters; photonic band gap; 2 GHz; full-wave electromagnetic simulator; harmonics; microstrip bandpass filter; microstrip filter; microwave filters; parallel-coupled filters; rectangular photonic bandgap loops; spurious suppression; stopband-rejection mode; Attenuation; Band pass filters; Circuits; Etching; Frequency; Microstrip filters; Microwave filters; Photonic band gap; Power harmonic filters; Wireless LAN;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/TUFFC.2005.1417271

Filename

1417271