H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/54, 351/57
H01Q 19/13 (2006.01)
Patent
CA 1201199
TITLE A DIELECTRIC ROD FEED FOR REFLECTOR ANTENNAS INVENTORS Lotfollah Shafai Apisak Ittipiboon Ernest Bridges ABSTRACT OF THE DISCLOSURE The feed which may be designed for operation in a single or dual bandwidth within a broad frequency range extending from a fraction of a GHz to many GHz, up to and including the range of 8 to 13 GHz. The feed includes a circular waveguide wherein one end is fitted with an electrical coupler and the other end acts as the radiator. A cylindrical dielectric rod is located within the radiating end of the waveguide and extends out of the guide to a length L which is less than .lambda.c/2 where .lambda. is the wavelength at the midband of the operating frequency. The diame- ter D of the dielectric rod may be equal to the inside of the waveguide, and is less than .lambda.o/.epsilon.r , where .lambda.o is the wavelength of the highest op- erating frequency of the feed and .epsilon.r is the relative dielectric constant of the dielectric rod.
429125
Bridges Ernest
Ittipiboon Apisak
Shafai Lotfollah
Bridges Ernest
Ittipiboon Apisak
Rymek Edward
Shafai Lotfollah
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