Multiple aperture higher order mode couplers: analysis and design

Author

Noerpel, A.R. ; Paul, A. ; Koiki, A. Sule

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

142

Issue

2

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

93

Lastpage

96

Abstract

A special class of multiple aperture couplers is used in terrestrial microwave radio to provide mode diversity protection to mitigate effects of multipath fading. In these couplers, one of the waveguides is overmoded and specific modes are extracted from this waveguide to a smaller waveguide through a set of circular apertures without affecting other propagating modes. A comprehensive analytical method applicable to both horizontal and vertical multi-aperture couplers is presented. The analysis, design and measured results for a horizontal mode coupler are discussed

Keywords

digital radio; electromagnetic wave polarisation; fading; microwave links; multipath channels; radio equipment; waveguide couplers; waveguide theory; analytical method; circular apertures; design; digital radio; higher order mode couplers; horizontal mode coupler; measured results; mode diversity protection; multipath fading; multiple aperture couplers; overmoded waveguides; polarised modes; propagating modes; terrestrial microwave radio; vertical multiaperture couplers;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19951798

Filename

386299