Around-the-mast rotary coupler with individual power module exci

Details Around-the-mast rotary coupler with individual power module exci Around-the-mast rotary coupler with individual power module exci

1981-12-24

1984-01-03

Lieberman, Eli

Communications: radio wave antennas

Antennas

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

333261, H01Q 302

Patent

active

044245165

ABSTRACT:
An annular rotary RF coupler for installation about a vertical support structure, particularly the mast of a ship. Two annular volumes are regularly divided into circumferential increments providing a cellular structure of individual waveguide cross-sections. A first annulus (stator) remains fixed, the individual waveguide sections therein being fed in equal phase from individual solid-state transmit/receive modules. The oppositely facing annulus (rotor) rotates with respect to the first annulus about the common mechanical center of rotation both share with a mechanically rotating antenna system. Connection to the rotating waveguide sections may be through power combiner/divider means (more than one rotor cell per antenna element or subarray), or individual antenna elements or subarrays may be discretely connected to corresponding waveguide sections in the rotor. For power tapering across the antenna aperture, the waveguide (cell) section dimensions in the circumferential direction within the rotating annulus may be appropriately tailored.

REFERENCES:
patent: 4253101 (1981-02-01), Parr

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