Title :
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
fDate :
4/1/1995 12:00:00 AM
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;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings
DOI :
10.1049/ip-map:19951798
