Paper Info
Title
Ultra-Wideband, Differential-Mode Bandpass Filters With Four Coupled Lines Embedded In Self-Complementary Antennas
Abstract
A design method for an ultra-wideband bandpass filter (BPF) with four coupled lines has been developed. For demonstration purposes, 50 Omega-matched self-complementary antennas integrated with the ultra-wideband, differential-mode BPF with four coupled lines, a notch filter, and a low-pass filter (LPF) were prepared and tested. An optimized structure for a single-stage, broadside-coupled and edge-coupled four-lines BPF was shown to exhibit up to 170% fractional bandwidth and an impedance transformation ratio of 1.2 with little bandwidth reduction, both analytically and experimentally. Using the optimized structure, 6-stage BPFs were designed to transform the self-complementary antenna's constant input impedance (60 pi epsilon(-1/2)(e)(Omega)) to 50 Omega without degrading bandwidth. In addition, two types of filter variations - a LPF-embedded BPF and a notch filter-embedded BPF - were designed and fabricated. The measured insertion loss of both filter systems was less than 2.6 dB over the ultra-wideband (UWB) band from 3.1 GHz to 10.6 GHz. The filter systems were embedded in the wideband self-complementary antennas to reject unnecessary radiation over the next pass band and 5-GHz wireless LAN band.
Year
DOI
Venue
2007
10.1093/ietele/e90-c.7.1524
IEICE TRANSACTIONS ON ELECTRONICS
Keywords
Field
DocType
differential mode antennas, band-pass filters, notch filters, low-pass filters, impedance transformer
Wideband,Band-stop filter,Band-pass filter,Electronic engineering,Bandwidth (signal processing),Low-pass filter,Engineering,Input impedance,Insertion loss,m-derived filter
Journal
Volume
Issue
ISSN
E90C
7
1745-1353
Citations 
PageRank 
References 
3
0.97
1
Authors
5
Name
Order
Citations
PageRank
Akira Saitou154.55
Kyoung-Pyo Ahn231.64
Hajime Aoki330.97
Kazuhiko Honjo41211.55
Koichi Watanabe530.97