Angle diversity signal separator using mode conversion

Details Angle diversity signal separator using mode conversion Angle diversity signal separator using mode conversion

1988-07-26

1990-04-03

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including polarized signal communication transmitter or...

343786, 455280, 333 21R, H01Q 2106, H01Q 1300, H01P 116, H04B 118

Patent

active

049144430

ABSTRACT:
In an angle diversity receiving system, the primary and diversity signals are produced by a waveguide signal separator coupled to a single receiving antenna.
The separator operates by converting selective higher order modes in the antenna into fundamental modes that will propagate in its two output waveguides. The result is a robust system that operates over a frequency band wide enough to cover both the 4 GHz and 6 GHz common carrier bands with both horizontally and vertically polarized signals, and that can use a wide variety of antennas.

REFERENCES:
patent: 3284725 (1966-11-01), Bowman
patent: 4160952 (1979-07-01), Seastrand
patent: 4373207 (1983-02-01), Hecken
patent: 4473828 (1984-09-01), Morz et al.
E. H. Lin, A. J. Giger, and G. D. Alley, "Angle Diversity on Line-of-Sight Microwave Paths Using Dual-Beam Dish Antennas" I.C.C., 1987, paper 23.5.
A. Malaga and S. A. Parl, "Experimental Comparison of Angle and Space Diversity for Line-of-Sight Microwave Links" Milcom, 1985, paper 19.5.
R. W. Hubbard, "Angle Diversity Reception for LOS Digital Microwave Radio" Milcom, 1985, paper 19.6.
E. T. Harkless and H. F. Lenzing, "Excitation of Higher Order Antenna Modes by Multipath Propagation", IEEE Transactions on Communications Technology, Aug. 1967, pp. 597-603.

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