An Ultra-Wide Stopband Lowpass Filter Using a Cross-Diapason-Shaped Defected Ground Structure

Author

Weng, Ro-Min ; Cheng, Shih-Ming ; Hsiao, Pai-Yi ; Chang, Yin-Hsin

Author_Institution

Dept. of Electr. Eng., Nat. Dong Hwa Univ., Hualien

fYear

2008

fDate

23-25 Jan. 2008

Firstpage

143

Lastpage

146

Abstract

An ultra-wide stopband lowpass filter (LPF) based on the defected ground structure (DGS) is presented in this paper. The proposed LPF is comprised of a cross-diapason-shaped (CDS) pattern along with two dumbbell-shaped pattern DGS. The substrate material is FR4 with dielectric constant of 4.6 and thickness of 0.8 mm. The proposed LPF provides a sharp rejection at 2.4 GHz with an ultra-wide stopband of 30 dB attenuation up to 10 GHz. The etched size can be minimized to be 53.8% less than that of the cascaded configuration. The simulation and measurement results of the CDS-DGS-LPF are provided.

Keywords

UHF filters; band-stop filters; low-pass filters; ultra wideband technology; CDS-DGS-LPF; FR4; cross-diapason-shaped defected ground structure; dielectric constant; dumbbell-shaped pattern DGS; frequency 10 GHz; frequency 2.4 GHz; substrate material; ultra-wide stopband lowpass filter; Band pass filters; Cutoff frequency; Dielectric loss measurement; Dielectric measurements; Dielectric substrates; Etching; Insertion loss; Microstrip; Microwave filters; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Silicon Monolithic Integrated Circuits in RF Systems, 2008. SiRF 2008. IEEE Topical Meeting on

Conference_Location

Orlando, FL

Print_ISBN

978-1-4244-1855-8

Electronic_ISBN

978-1-4244-1856-5

Type

conf

DOI

10.1109/SMIC.2008.42

Filename

4446276