Television transmission system using overmoded waveguide
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United States of America Patent
Stats
-
Dec 9, 1986
Grant Date -
N/A
app pub date -
May 13, 1985
filing date -
May 13, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A television transmission system for transmitting UHF signals from a UHF signal generator, the system comprising an antenna for radiating UHF signals generated by said UHF signal generator, an overmoded section of waveguide for carrying the signals at least part of the way between the UHF signal generator and the antenna with a low level of power loss, and a high-power mode filter coupled between the antenna and the overmoded section of waveguide. The filter comprises an overmoded waveguide section for propagating the signals in both a desired mode and undesired higher order modes; an undermoded waveguide section coupled to the overmoded section for propagating the signals only in the desired mode, the transition between the overmoded and undermoded waveguide sections in the high-power mode filter reflecting the higher-order-mode signals into the overmoded section; at least one pair of resonant slots formed in opposing walls of the overmoded section for coupling the higher-order-mode signals out of the transmission system; a pair of side-arm waveguides for receiving the higher-order-mode signals from the slots and for dissipating the higher-order-mode signals.
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Cited Art Landscape
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