A design of microstrip-disk-type directional couplers

Author

Kawai, Tadashi ; Fukumoto, Takeshi ; Kokubo, Yoshihiro ; Ohta, Isao ; Jui-Pang, Hsu.

Author_Institution

Dept. of Electron., Himeji Inst. of Technol., Hyogo, Japan

Volume

3

fYear

1997

fDate

2-5 Dec 1997

Firstpage

1145

Abstract

This paper describes a design of microstrip rectangular disk quadrature directional couplers on the basis of a modified eigenfunction expansion method with consideration of frequency dependences of an effective width and an effective relative permittivity of a microstrip disk circuit. Using this approximate method, we can optimize the disk configuration of directional couplers in a reasonable computational time. The validity of the design method is examined by comparison with the numerical results by the FDTD method

Keywords

eigenvalues and eigenfunctions; finite difference time-domain analysis; microstrip directional couplers; permittivity; FDTD method; approximate method; design method; directional couplers; disk configuration optimisation; effective relative permittivity; frequency dependence; microstrip disk circuit; microstrip-disk-type; modified eigenfunction expansion method; rectangular disk quadrature couplers; Design engineering; Design methodology; Directional couplers; Eigenvalues and eigenfunctions; Finite difference methods; Frequency; Impedance; Magnetic circuits; Microstrip; Permittivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific

Print_ISBN

962-442-117-X

Type

conf

DOI

10.1109/APMC.1997.656509

Filename

656509