A wide bandpass filter with defected ground structure for wide out-of-band suppression

Author

Chi-Jeon Hwang ; Lok, L.B. ; Thayne, I.G. ; Elgaid, K.

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. of Glasgow, Glasgow, UK

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

2018

Lastpage

2021

Abstract

This paper presents a wide bandpass filter (BPF) with low insertion loss and excellent harmonic out-of-band suppression over a very wideband. The filter consists of a standard ultra-wideband bandpass filters design approach combined with periodic defected ground structure (DGS), which is able to inhibit signal propagation over a wideband. To realize this filter, a wideband microstrip BPF with a bandwidth covering 3.7 GHz is implemented in an RO4350 substrate (ε_r = 3.66, h = 0.762 mm). This bandpass filter shows a wide bandwidth with measured insertion loss better than 0.9dB and spurious suppression better than 24 dB.

Keywords

band-pass filters; microstrip filters; ultra wideband technology; RO4350 substrate; bandwidth 3.7 GHz; filter design approach; low insertion loss; periodic defected ground structure; signal propagation; standard ultrawideband bandpass filters; wide bandpass filter; wide out-of-band suppression; wideband microstrip BPF; Band pass filters; Bandwidth; Coplanar waveguides; Impedance; Insertion loss; Microstrip filters; Power harmonic filters; Prototypes; Resonator filters; Ultra wideband technology; Bandpass filter; defected ground structure (DGS); wide bandwidth; wide out-of-band suppression;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Type

conf

DOI

10.1109/APMC.2009.5385299

Filename

5385299