Communications: radio wave antennas – Antennas – Slot type
Patent
1983-12-16
1986-09-23
Lieberman, Eli
Communications: radio wave antennas
Antennas
Slot type
343771, 343777, 343371, H01Q 1310
Patent
active
046138692
ABSTRACT:
An electronically scanned array antenna useful for millimeter wavelength energy is disclosed. The antenna comprises a fully ferrite loaded square or round waveguide having radiating apertures spaced along part of its length. Rf energy is circularly polarized in the waveguide. The phase velocity of the wave is controlled by applying a longitudinal magnetic field to the ferrite to produce a controllable linear progressive phase of the energy radiated from the apertures to form a beam in the desired direction. The phase control is of a latching type using flux drive. The particular structure of the invention enables combining a plurality of branching array elements with a feed element to form an array capable of two dimension beam scanning.
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M. I. Skolnik, "Introduction to Radar Systems", Second Edition, 1980, McGraw-Hill, pp. 291-297.
Horn, Jacobs, Freibergs, and Klohn, "Electronic Modulated Beam-Steerable Silicon Waveguide Array Antenna," IEEE Transactions on Microwave Theory and Techniques, vol. MTT-28, No. 6, Jun. 1980, pp. 647-653.
Ajioka James S.
Strahan James V.
Hughes Aircraft Company
Karambelas A. W.
Lieberman Eli
Runk T. A.
Wimer Michael C.
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