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首页> 美国政府科技报告 >High Power, Pulsed Microwave Tube for a Synthetic Aperture Radar Electrical Model. Phase 2: Manufacture and Test
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High Power, Pulsed Microwave Tube for a Synthetic Aperture Radar Electrical Model. Phase 2: Manufacture and Test

机译：用于合成孔径雷达电气模型的高功率脉冲微波管。阶段2：制造和测试

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Manufacture, evaluation, and improvement of a klystron electrical model for synthetic aperture radar are summarized. An electrically and mechanically satisfactory gridded cathode design, with 1A/sqcm current loading was produced. Permanent magnet (PM) and periodic permanent magnet (PPM) systems to focus the electron beam in the klystron are demonstrated. Unmodulated beam transmission with a PM is 99% when the tube is fitted with a coaxial output and 94% with a waveguide output; 99.5% transmission is obtained with a PPM system. A low height waveguide output line is shown to be adequate to handle the output power. Despite modifications to the collector end of the permanent magnet, which result in a nonoptimum focusing field and worse beam transmission, the efficiency of the tube is or = 40%. Up to 1.5 kV depression on a single collector is demonstrated. Conversion efficiency can be improved by redesigning the magnet cap.

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