Wave transmission lines and networks – Long line elements and components – Waveguide elements and components
Patent
1995-09-18
1996-08-20
Gensler, Paul
Wave transmission lines and networks
Long line elements and components
Waveguide elements and components
29600, H01P 108, H01Q 1300
Patent
active
055482570
ABSTRACT:
A vacuum output window comprises a planar dielectric material with identical systems of parallel ridges and valleys formed in opposite surfaces. The valleys in each surface neck together along parallel lines in the bulk of the dielectric. Liquid-coolant conduits are disposed linearly along such lines of necking and have water or even liquid nitrogen pumped through to remove heat. The dielectric material can be alumina, or its crystalline form, sapphire. The electric-field of a broadband incident megawatt millimeter-wave radio frequency energy is oriented perpendicular to the system of ridges and valleys. The ridges, about one wavelength tall and with a period of about one wavelength, focus the incident energy through in ribbons that squeeze between the liquid-coolant conduits without significant losses over very broad bands of the radio spectrum. In an alternative embodiment, the liquid-coolant conduits are encased in metal within the bulk of the dielectric.
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S. D. Nelson, et al., "Electromagnetic and Thermal Analysis of Distributed Cooled High Power Millimeter Wave Windows," Lawrence Livermore National Laboratory Report UCRL-JC-119969, May 12, 1995, Lawrence Livermore National Laboratory, Livermore, CA 94550.
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Caplan Malcolm
Shang Clifford C.
Gensler Paul
Main Richard B.
Sartorio Henry P.
The Regents of the University of California
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