Study and suppression of ripples in passbands of series/parallel loaded EBG filters

Author

Gao, Chu ; Chen, Zhi Ning ; Wang, Yun Yi ; Yang, Ning ; Qing, Xian Ming

Author_Institution

Dept. of Radio Eng., Southeast Univ., Nanjing, China

Volume

54

Issue

4

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1519

Lastpage

1526

Abstract

This paper presents a method to suppress the ripples in passbands of series/parallel loaded finite period electromagnetic-bandgap (EBG) filters. Based on the study of equivalent circuits, the ripples in passbands of EBG filters with different resonant loads are compared. A four-section resonant slot loaded microstrip EBG filter is exemplified to validate the proposed design method experimentally. Both simulation and measurement show 50-dB attenuation at the center of the first stopband and less than 0.29-dB ripples in the adjacent passbands.

Keywords

band-pass filters; band-stop filters; equivalent circuits; interference suppression; microstrip filters; photonic band gap; EBG filters; electromagnetic-bandgap filters; equivalent circuits; microstrip filter; resonant slot filter; ripple suppression; Attenuation; Band pass filters; Design methodology; Frequency; Metamaterials; Microwave filters; Passband; Periodic structures; Photonic band gap; Resonance; Bandstop filters; electromagnetic bandgap (EBG); equivalent circuits; ripples;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2006.871925

Filename

1618571