A Wideband Bandpass Filter With Wide Upper Stopband Using Stepped-Impedance Cascadable 180 ^ Hybrid Rings

This letter proposes a wideband bandpass filter by cascading two 3-dB stepped-impedance cascadable 180deg hybrid rings with a pair of stepped-impedance lines. Thanks to the stepped-impedance lines, a broad upper stopband is achieved. The stepped-impedance vertically installed planar (VIP) coupler is...

Full description

Saved in:
Bibliographic Details
Published in:IEEE microwave and wireless components letters 2007-08, Vol.17 (8), p.589-591
Main Authors: CHI, Chun-Hsiang, CHANG, Chi-Yang
Format: Article
Language:English
Subjects:
Applied sciences
Band pass filters
Bandwidth
Circuit properties
Circuits of signal characteristics conditioning (including delay circuits)
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Frequency
Frequency filters
Insertion loss
Inverters
Microstrip
Passband
Phase inverter
Power harmonic filters
Resonator filters
stepped-impedance
vertically installed planar (VIP) coupler
Wideband
wideband bandpass filter (BPF)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This letter proposes a wideband bandpass filter by cascading two 3-dB stepped-impedance cascadable 180deg hybrid rings with a pair of stepped-impedance lines. Thanks to the stepped-impedance lines, a broad upper stopband is achieved. The stepped-impedance vertically installed planar (VIP) coupler is used to implement the ideal 180deg phase inverter and crossovers. The experimental results show that this 2-GHz center frequency, fourth order filter has a 10-dB return loss bandwidth of 92.5% and upper stopband rejection levels of better than -20 dB up to 6.8 GHz. This proposed filter achieves wide passband and broad stopband performance simultaneously.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2007.901771