Staff Members - Benha University
Microstrip Lowpass Filter with Wideband Rejection using Opened Circuit Stubs and Z-slots Defected Ground Structures
Microwave and Optical Technology Letters • 2011
Publication Information
Authors
Ashraf s.Mohra
Keywords
microstrip; defected ground structures; low pass filter;
wideband rejection; Z-slot
Journal
Microwave and Optical Technology Letters
Publisher
wiely interscience
Volume
53
Issue
4
Pages
811-815
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
A new microstrip low pass filter (LPF) with defected
ground structure (DGS) is proposed in this article. The DGSs consists of
reshaped rectangular dumbbell slot and four groups of Z-shape slots.
The microstrip line with DGS gave good rejection band extend from 3.0
to 9 GHz with acceptable pass band. The microstrip line with open
circuit stubs (without DGS) gave good rejection band at the high
frequency from 9 to 14 GHz. Using both structures results in LPF with
wideband rejection from 3.37 to 14 GHz with attenuation less than
(26.0dB) and good passband less than (25 dB). An equivalent circuit
for the proposed LPF was given. The realized filter size was 34.0
34.0 mm2, and it gave good agreement with simulated results
ground structure (DGS) is proposed in this article. The DGSs consists of
reshaped rectangular dumbbell slot and four groups of Z-shape slots.
The microstrip line with DGS gave good rejection band extend from 3.0
to 9 GHz with acceptable pass band. The microstrip line with open
circuit stubs (without DGS) gave good rejection band at the high
frequency from 9 to 14 GHz. Using both structures results in LPF with
wideband rejection from 3.37 to 14 GHz with attenuation less than
(26.0dB) and good passband less than (25 dB). An equivalent circuit
for the proposed LPF was given. The realized filter size was 34.0
34.0 mm2, and it gave good agreement with simulated results