H - Electricity – 01 – Q
Patent
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 1137218
TURRIN 4 12. HYBRID MODE WAVEGUIDE AND FEEDHORN ANTENNAS 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 feedhorn comprises a circular waveguide including a tubular section at the TE11 mode entrance port changing in the antenna configuration to a conical section that flares outward to the feedhorn mouth, and a spiro-helical projection bonded to the interior surface of the waveguide. In a first arrangemnent, the spiro-helical projection comprises an initially flattened dielectrically coated wire that gradually returns to a rounded configuration in closely spaced helical turns after which the spacings between turns gradually increase linearly in the tubular section and then continue with uniform spacings in the conical section. In a second arrangement, multiple layers of closely-wound helically wound dielectrically coated wires, which layers gradually taper down to a single layer, can replace the closely spaced flattened-to-round wire section of the first arrangement.
358761
Kirby Eades Gale Baker
Western Electric Company Incorporated
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