A very small dielectric planar filter for portable telephones

Author

Ishizaki, Toshio ; Fujita, Mitsuhioro ; Kagata, Hiroshi ; Uwano, Tomoki ; Miyake, Hideyuki

Author_Institution

Components & Devices Res. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

Volume

42

Issue

11

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

2017

Lastpage

2022

Abstract

A high performance, high-dielectric stripline filter with the size of 4.5 mm×3.2 mm×2.0 mm has been developed. The filter consists of planar resonators and its structure is made of high permittivity multilayer ceramic in the Bi-Ca-Nb-O system. The performance is distinctive with its attenuation pole. An equivalent lumped circuit is derived to explain the behavior of the attenuation pole quantitatively. A precise design procedure is also described

Keywords

UHF filters; cellular radio; ceramics; cordless telephone systems; equivalent circuits; passive filters; resonator filters; strip line filters; 1.2 GHz; 2 mm; 3.2 mm; 4.5 mm; 800 MHz; 950 MHz; Bi-Ca-Nb-O; MLC type; UHF band; attenuation pole; design procedure; dielectric planar filter; equivalent lumped circuit; high permittivity multilayer ceramic; planar resonators; portable telephones; radiotelephony; stripline filter; Attenuation; Band pass filters; Capacitors; Ceramics; Dielectrics; Nonhomogeneous media; Permittivity; Resonator filters; Stripline; Telephony;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.330112

Filename

330112