Analysis and design of lumped- and lumped-distributed-element directional couplers for MIC and MMIC applications

Author

Vogel, Ryszard W.

Author_Institution

NobelTech, Jarfalla, Sweden

Volume

40

Issue

2

fYear

1992

fDate

2/1/1992 12:00:00 AM

Firstpage

253

Lastpage

262

Abstract

An analysis of lumped-element and lumped-distributed-element directional couplers is described. The assumed generality of the ring-type four-port enables different types of directionality to be developed. The equations that make possible an idealized design of co-, contra- and trans-directional couplers for arbitrary power division and transformation ratio are derived. A design procedure for three-branch, lumped-element directional couplers that allows an impedance transformation between the input and output ports is also included. Computer simulations of the performance of various couplers with lumped elements represented by realistic models are included

Keywords

directional couplers; distributed parameter networks; lumped parameter networks; MIC applications; MMIC applications; design procedure; directionality types; impedance transformation; lumped-distributed-element directional couplers; lumped-element directional couplers; power division; ring-type four-port; transformation ratio; Circuit simulation; Directional couplers; Equations; Equivalent circuits; Frequency; Impedance; MMICs; Microstrip; Microwave integrated circuits; Power transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.120097

Filename

120097