A new mathematical design method of microstrip tapped-line filters

Author

Lee, Il-Woo ; Han, Seung-Hyun ; Yun, Tae-Soon ; Yoon, Ki-Cheol ; Fang, Zhang ; Lee, Jong-Chul

Author_Institution

Kwangwoon Univ., Seoul

fYear

2006

fDate

12-15 Dec. 2006

Firstpage

1276

Lastpage

1279

Abstract

In this paper, a new mathematical design method of tapped-line pseudo-combline and interdigital filters is proposed. The parameters of tapped feeding are obtained by the input admittance of filter´s prototype, and the tapped feeding structure is designed by the open stub and the additional transmission line with negative electrical length. The electrical lengths of the stub and line are functions of line impedance. The designed tapped feeding method is applied to pseudo-combline and interdigital filters and the results are well matched to the filter´s theory.

Keywords

comb filters; digital filters; microstrip filters; microstrip resonators; transmission lines; interdigital filters; line impedance; microstrip tapped-line filters; negative electrical length; pseudo-combline filters; Admittance; Band pass filters; Design methodology; Equivalent circuits; Filtering theory; Impedance; Matched filters; Microstrip filters; Prototypes; Transmission line theory; J-inverter; Tapped-line; band-pass filters; interdigital; pseudo-combline;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. APMC 2006. Asia-Pacific

Conference_Location

Yokohama

Print_ISBN

978-4-902339-08-6

Electronic_ISBN

978-4-902339-11-6

Type

conf

DOI

10.1109/APMC.2006.4429638

Filename

4429638