A compact multimode bandpass filter with extended stopband bandwidth
Yeo, Kiat Seng
Date of Issue2012
School of Electrical and Electronic Engineering
A compact multimode bandpass filter with low insertion loss, high stopband rejection and wide stopband bandwidth is introduced by using cascaded multimode resonators and compact loading cells in combination. The measured minimum insertion loss is of 1.7dB including the connector loss in the input and output ports in the passband of 5.7~8 GHz. Through the use of cascaded multimode resonators, steep skirt selectivity and wide stopband up to 18 GHz can be achieved. When incorporated with the lowpass loading cells, which have elliptical low-pass response by using the source-load coupling, the stopband of the proposed filter can be further extended up to 40 GHz, with only negligible influence on the passband performance.
DRNTU::Engineering::Electrical and electronic engineering
Progress in electromagnetics research letters
© 2012 EMW Publishing. This paper was published in Progress In Electromagnetics Research Letters and is made available as an electronic reprint (preprint) with permission of EMW Publishing. The paper can be found at the following official DOI: [http://dx.doi.org/10.2528/PIERL12042201]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.