Hybrid mode waveguide or feedhorn antennas

Details Hybrid mode waveguide or feedhorn antennas Hybrid mode waveguide or feedhorn antennas

H - Electricity

01

Q

333/15, 351/30

H01Q 13/02 (2006.01) H01P 1/16 (2006.01) H01P 3/127 (2006.01)

Patent

CA 1137219

NOERPEL 1 13. HYBRID MODE WAVEGUIDE OR FEEDHORN ANTENNA Abstract of the Disclosure The present invention relates to a hybrid mode waveguide or feedhorn antenna for transforming the TE11 mode into the HE11 mode. The waveguide or antenna comprises a first waveguide section of uniform cross- section at the TE11 mode entrance port which in the antenna arrangement changes to a second section which flares outward toward the antenna mouth, and a spiro-helical projection bonded with a dielectric layer to the inner surface of the waveguide or antenna. The spiro-helical projection comprises a closely spaced helically wound wire structure formed of dielectrically coated wires which in the first section decrease in gauge size in small adjacent portions thereof as the helix progresses away from the TE11 mode entrance port and in the remainder of the helical projection, the same or decreasing gauge wire in adjacent portions can be used.

358762

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