SLIDE 4 BEAMED RF POWER TECHNOLOGY dc-RF CONVERTER HARMONICS MEASURED HARMONIC LEVELS ARE DISPLAYED FOR SELECTED SOLID STATE AND TUBE-TYPE CONVERTERS. THE KLYSTRON HIGH POWER MEASUREMENTS ARE DIFFICULT AS THEY REQUIRE A SPECIALLY DESIGNED, MULTI-APERTURED ("PORCUPINE"), WAVEGUIDE DEVICE TO ENSURE SAMPLING THE CONTRIBUTIONS IN ALL MODES TO DETERMINE THE TOTAL HARMONIC POWER. THE KLYSTRON DATA SHOWS THAT THE FOURTH HARMONIC LEVELS MAY BE SLIGHTLY REDUCED BY OPERATING THE UNIT INA LINEAR, RATHER THAN SATURATED, MODE-HOWEVER, THE EFFICIENCY SUFFERS.
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