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High power water load for microwave and millimeter-wave radio frequency sources

United States Patent

5,949,298
September 7, 1999
View the Complete Patent at the US Patent & Trademark Office
A high power water load for microwave and millimeter wave radio frequency sources has a front wall including an input port for the application of RF power, a cylindrical dissipation cavity lined with a dissipating material having a thickness which varies with depth, and a rear wall including a rotating reflector for the reflection of wave energy inside the cylindrical cavity. The dissipation cavity includes a water jacket for removal of heat generated by the absorptive material coating the dissipation cavity, and this absorptive material has a thickness which is greater near the front wall than near the rear wall. Waves entering the cavity reflect from the rotating reflector, impinging and reflecting multiple times on the absorptive coating of the dissipation cavity, dissipating equal amounts of power on each internal reflection.
Ives; R. Lawrence (Saratoga, CA), Mizuhara; Yosuke M. (Palo Alto, CA), Schumacher; Richard V. (Sunnyvale, CA), Pendleton; Rand P. (Saratoga, CA)
Calabazas Creek Research (Saratoga, CA)
08/ 956,350
October 23, 1997
This invention was made with U.S. Government support under grant DE-FG03-95ER81938 awarded by the Department of Energy. The U.S. Government has certain rights in this invention.