A low-pass filter by using a meandered slot

Author

Yu-Wei Cheng ; Jhong-Wei Wu ; Tz-Hsiung Lin ; Chien-Jen Wang

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Tainan, Tainan, Taiwan

fYear

2014

fDate

4-6 Aug. 2014

Firstpage

187

Lastpage

188

Abstract

A new low-pass filter (LPF) with a wide stopband has been presented in this study. The proposed filter is based on a defected ground structure (DGS), including a modified-meandered slot, a spurred C-like slot, and a microstrip transmission line with a 50 Ω. Two rectangular-headed slots are etched at terminals of the meandered slot, thus giving increase of the inductance and then the purposed frequency reduction. To improve rejection capability, the width of the meandered-slot resonator is also widened. An arm aperture is embedded to create new resonant path; in addition, a C-like slot with a spur slit is embedded inside the meandered slot so that the filter not only creates two transmission zeros in the stopband, but also exhibits a wide upper stopband. The filter possesses a measured minimum insertion loss of 0.7 dB over the passband and a wide stopband with rejection better than -20 dB from 2.9 to 12.0 GHz.

Keywords

UHF filters; band-stop filters; defected ground structures; inductance; losses; low-pass filters; microstrip resonators; microwave filters; transmission lines; DGS; LPF; arm aperture; defected ground structure; frequency 2.9 GHz to 12.0 GHz; frequency reduction; inductance; loss 0.7 dB; low-pass filter; microstrip transmission line; minimum insertion loss; modified-meandered slot resonator; rectangular-headed slots; rejection capability improvement; resistance 50 ohm; resonant path; spur slit; spurred C-like slot; transmission zeros; wide upper stopband; defected ground structure; meandered slot; transmission zero;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics (iWEM), 2014 IEEE International Workshop on

Conference_Location

Sapporo

Type

conf

DOI

10.1109/iWEM.2014.6963699

Filename

6963699