Around-the-mast rotary coupler

Details Around-the-mast rotary coupler Around-the-mast rotary coupler

1979-05-18

1980-09-09

Lieberman, Eli

Communications: radio wave antennas

Antennas

With means for moving directive antenna for scanning,...

343890, 333261, H01Q 302, H01P 106

Patent

active

042220556

ABSTRACT:
An annular rotary RF coupler for installation about a vertical support structure, particularly the mast of a ship. Two annular troughs are regularly divided in circumferential increments providing a cellular structure of individual waveguide cross-sections. A lower annulus remains fixed, the individual waveguide sections therein being fed from a power-divided, equal-phase, feed configuration. The oppositely facing upper annulus rotates with respect to the lower one about a common mechanical center of rotation of a mechanically rotating antenna system. Connection to the rotating waveguide sections may be through power combiner/divider means, or individual subarrays may be discretely connected to one or more waveguide sections in the rotating annulus. For power tapering across an antenna array aperture, the waveguide section dimensions in the circumferential direction within the rotating annulus are appropriately tailored.

REFERENCES:
patent: 3546699 (1970-12-01), Smith

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