DocumentCode
1144274
Title
Two-Cavity Filter With Three Transmission Zeros
Author
Zhu, Yong-Zhong ; Xie, Yong-Jun ; Feng, He
Author_Institution
Nat. Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´´an
Volume
18
Issue
5
fYear
2008
fDate
5/1/2008 12:00:00 AM
Firstpage
317
Lastpage
319
Abstract
It is well known that an N-order coupling network with source-load coupling can realize a maximum number of transmission zeros equal to N. However, in the letter, by utilizing open-circuited stubs and increasing the velocity ratio, a novel two-pole hairpin filter can obtain three transmission zeros, which can improve selectivity in the lower stopband. The filter is analyzed extensively by using the relations between the types of coupled microstrip lines and transmission zeros of transfer response. Good agreement between measured and simulated data has been demonstrated.
Keywords
microstrip filters; poles and zeros; N-order coupling network; coupled microstrip lines; open-circuited stubs; three transmission zeros; transfer response; two-cavity filter; two-pole hairpin filter; Even and odd-mode; filter; microstrip line; transmission zero;
fLanguage
English
Journal_Title
Microwave and Wireless Components Letters, IEEE
Publisher
ieee
ISSN
1531-1309
Type
jour
DOI
10.1109/LMWC.2008.922116
Filename
4497879
Link To Document