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Microwave Tubes

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    1. Microwave Tubes

    3. Important Parameters Peak power Average power Efficiency Gain Bandwidth Frequency Harmonic and spurious power Intermodulation products Manufacturability at low cost

    5. Klystron

    6. TWT

    7. Major applications for TWTs include: Amplifiers: Space applications Radar Electron Counter Measure Missile Driver for other high power RF amplifiers

    8. Missile TWTs for Active Seekers Features that influence the design include: Minimal size and weight; Narrow-to-moderate bandwidths;. Off-to-fully-operational turn-on times of one second or less; High efficiency; High reliability after long inactive storage periods. Normally, these TWTs are of the periodic-permanent-magnet (PPM) focused helix variety. They normally utilize unique cathode-heater designs to provide the very fast warm-up required. They typically have multiple stage depressed collectors with conduction cooling.