Design of waveguide narrow-wall short-slot couplers

Author

Hendrick, Louis W. ; Levy, Ralph

Author_Institution

Hughes Aircraft Co., El Segundo, CA, USA

Volume

48

Issue

10

fYear

2000

fDate

10/1/2000 12:00:00 AM

Firstpage

1771

Lastpage

1774

Abstract

It is shown that the broad-band coupling properties of narrow-wall short-slot directional couplers and hybrids are due to the effect of the evanescent TE₃₀ mode in the coupling region. This causes a change to the effective phase length of the even-mode circuit, especially when a central tuning element is used. Using the results of a previous paper on the formation of an equivalent circuit from the generalized scattering matrix, an equivalent circuit for the even mode of the coupler is formed, clearly depicting the effect of the TE₃₀ mode

Keywords

S-matrix theory; directional couplers; equivalent circuits; tuning; waveguide couplers; broadband coupling properties; central tuning element; coupling region; directional couplers; equivalent circuit; evanescent TE₃₀ mode; even mode coupler; even-mode circuit; hybrids; phase length; short-slot couplers; waveguide narrow-wall couplers; Antenna feeds; Circuit optimization; Coupling circuits; Directional couplers; Directive antennas; Equivalent circuits; Hybrid junctions; Scattering; Transmission line matrix methods; Waveguide junctions;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.873910

Filename

873910