Tunable resonator employing comb-shaped transmission line and switches

Author

Kawai, Kunihiro ; Koizumi, Daisuke ; Okazaki, Hiroshi ; Narahashi, Shoichi

Author_Institution

Wireless Labs., NTT DoCoMo Inc., Yokosuka, Japan

Volume

1

fYear

2005

fDate

4-6 Oct. 2005

Abstract

This paper presents a novel digital tunable resonator. It comprises a λ/4-length microstrip transmission line with a comb-shaped pattern on both sides of the line and multiple switches. Each switch is placed on the edge of two adjoining comb teeth to connect them to each other. The resonant frequency of the resonator can be changed by controlling the high frequency current path length using the switches. Electro-magnetic simulations are performed and the estimated tuning ratio is 22%. A prototype of the proposed resonator is fabricated to verify the feasibility, and the measured characteristics agree well with the simulated ones.

Keywords

computational electromagnetics; microstrip components; microstrip lines; microstrip resonators; microswitches; tuning; 5 GHz; comb-shaped transmission line; digital tunable resonator; electromagnetic simulations; high frequency current path length; microstrip transmission line; multiple switches; resonant frequency; Bandwidth; Contacts; Radio frequency; Resonant frequency; Resonator filters; Switches; Teeth; Transmission lines; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1608826

Filename

1608826