A dual-plane comb-line filter having plural attenuation poles

Author

Kitamura, Toshiaki ; Horii, Yasushi ; Geshiro, Masahiro ; Sawa, Shinnosuke

Author_Institution

Coll. of Eng., Osaka Prefecture Univ., Japan

Volume

50

Issue

4

fYear

2002

fDate

4/1/2002 12:00:00 AM

Firstpage

1216

Lastpage

1219

Abstract

In this paper, a dual-plane comb-line filter having plural attenuation poles is proposed. We investigate the filtering characteristics from both experiments and numerical simulations by means of the finite-difference time-domain method. It is shown that this filter has attenuation poles just above, as well as below the passband and that intersections between the curves of input susceptance of the even and odd modes agree with the attenuation-pole frequencies. Furthermore, it is demonstrated that, by changing the position of the metal pin, which connects two resonators, we can change the input susceptance of the odd mode alone and, hence, regulate the attenuation-pole frequencies

Keywords

S-parameters; comb filters; finite difference time-domain analysis; poles and zeros; waveguide filters; dual-plane comb-line filter; even modes; filtering characteristics; finite-difference time-domain method; input susceptance; numerical simulations; odd modes; plural attenuation poles; Attenuation; Coplanar waveguides; Filtering; Finite difference methods; Frequency; Metallization; Numerical simulation; Passband; Resonator filters; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.993427

Filename

993427