UHF-TV broadcast system having circular, non-coaxial waveguide t

Details UHF-TV broadcast system having circular, non-coaxial waveguide t UHF-TV broadcast system having circular, non-coaxial waveguide t

1990-05-01

1991-05-21

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Mast or tower type

343890, 333251, H01Q 934, H01P 1162

Patent

active

050179381

ABSTRACT:
A UHF-TV broadcast system comprising an antenna mounted on an elevated supporting structure for broadcasting UHF-TV to a prescribed region, and a transmission line having a horizontal run leading to the supporting structure for the antenna, and a vertical run leading to the antenna, the transmission line comprising a circular non-coaxial waveguide having an inside diameter large enough to support the propagation of electromagnetic energy therethrough in at least the circular, non-coaxial TE.sub.11 mode, and a multiplicity of conductive elements extending transversely across the interior of the waveguide at intervals along the length of the waveguide perpendicular to the electric field vector of TE.sub.11 -mode energy having a desired polarization, for suppressing unwanted TE.sub.11 -mode energy that is cross-polarized relative to the desired polarization.

REFERENCES:
patent: 2425345 (1947-08-01), Ring
patent: 2438119 (1948-03-01), Fox
patent: 2603709 (1952-07-01), Bowen
patent: 2603710 (1952-07-01), Bowen
patent: 2628278 (1953-02-01), Zaleski
patent: 2981906 (1961-04-01), Turner
patent: 3296558 (1967-01-01), Bleackley
patent: 4100514 (1978-07-01), DiTullio et al.
patent: 4549310 (1985-10-01), Woodward
patent: 4599744 (1986-07-01), Vaughan
patent: 4755777 (1988-07-01), Cohen et al.

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