Optimization of a lumped element circulator based on eigen inductance evaluation and structural improvement

Author

Miura, T. ; Kobayashi, M. ; Nagata, H. ; Konishi, Y.

Author_Institution

Mater. Res. Center, TDK Corp., Chiba, Japan

Volume

1

fYear

1996

fDate

17-21 June 1996

Firstpage

117

Abstract

An optimization technique for a lumped element circulators has been established from the point of view of structure and characteristic design. Structural optimization was achieved by the application of multilayer ceramic technology and a novel conductor formation method to decrease the insertion loss of the circulator. A theoretical design based on an evaluation of eigen inductance made it possible to broaden the isolation bandwidth of a structurally improved circulator. The 20 dB isolation bandwidth of 5.8% and the insertion loss of 0.55 dB at 800 MHz obtained by this circulator have significantly exceeded the characteristics of conventional circulators of the same size.

Keywords

circulators; eigenvalues and eigenfunctions; inductance; lumped parameter networks; optimisation; 0.55 dB; 800 MHz; conductor formation; design; eigen inductance; insertion loss; isolation bandwidth; lumped element circulator; multilayer ceramic technology; structural optimization; Bandwidth; Ceramics; Conductors; Coupling circuits; Design optimization; Equivalent circuits; Inductance; Insertion loss; Resonance; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1996., IEEE MTT-S International

Conference_Location

San Francisco, CA, USA

ISSN

0149-645X

Print_ISBN

0-7803-3246-6

Type

conf

DOI

10.1109/MWSYM.1996.508476

Filename

508476