A quasi-TEM design method for 3 dB hybrid couplers using a semi-reentrant coupling section

Author

Nakajima, Masahiro ; Yamashita, E.

Author_Institution

Univ. of Electro-Commun., Tokyo

Volume

38

Issue

11

fYear

1990

fDate

11/1/1990 12:00:00 AM

Firstpage

1731

Lastpage

1733

Abstract

An effective quasi-TEM design method for 3-db hybrid couplers using a semi-reentrant coupling section is presented. The analysis is based on the use of the rectangular boundary division method for solving the boundary value problem, including thick-strip conductors in an inhomogeneous medium. A trial design of a microstrip 3-dB coupler using substrates of low dielectric constant has been carried out by adding a sequential optimisation algorithm to the analysis method. Measured parameters of the designed 3-dB hybrid coupler are compared with the theoretical ones

Keywords

boundary-value problems; strip line components; waveguide couplers; 3 dB hybrid couplers; boundary value problem; inhomogeneous medium; low dielectric constant substrate; microstrip; quasi-TEM design method; rectangular boundary division method; semi-reentrant coupling section; semireentrant coupling; sequential optimisation algorithm; thick-strip conductors; Algorithm design and analysis; Boundary value problems; Conductors; Couplers; Design methodology; Design optimization; Dielectric constant; Dielectric measurements; Dielectric substrates; Microstrip;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.60021

Filename

60021