UHF-TV broadcast system having circular, non-coaxial waveguide transmission line for operation in the TE.sub.11 mode
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United States of America Patent
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May 21, 1991
Issued Date -
N/A
app pub date -
May 1, 1990
filing date -
Apr 6, 1988
priority date (Note) -
Expired
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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.
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