Transformed radial stub cell embedded resonator for high performance filter applications
Author
Ma, Kaixue
Mou, Shouxian
Wang, Keping
Mahalingam, Nagarajan
Yeo, Kiat Seng
Date of Issue
2012Conference Name
IEEE MTT-S International Microwave Symposium Digest (2012 : Montreal, Canada)
School
School of Electrical and Electronic Engineering
Abstract
Parasitic passbands of the traditional resonators or bandpass filters are drawbacks for the resonator or filter to achieve wide stopband. A bandpass filter topology designed based on the embedded transformed radial stub cells is proposed for the first time. The implemented filter with center frequency ƒc=1.73 GHz and absolute bandwidth of 200MHz (fractional bandwidth of 1.2%) using transformed radial stub cell embedding demonstrates more than 45dB rejection up to 10.4ƒc i.e. 18 GHz. The measured group delay is around 3.6∼4.3 nS. The sizes of the designed fourth order bandpass filter is only 0.42 λg × 0.26 λg, (λg is the guide wavelength at center cutoff frequency) without using any lumped elements.
Subject
DRNTU::Engineering::Electrical and electronic engineering
Type
Conference Paper
Rights
© 2012 IEEE
Collections
http://dx.doi.org/10.1109/MWSYM.2012.6258258
Get published version (via Digital Object Identifier)