Electrostatically-focused extended-interaction S-band klystron amplifier

Abshoct-High-power klystrons, coqpled-cavity traveling-wave tubes (TWT's), and hybrid tabes, all of which utilize the microwave cavity as the basic circuit element, are described These amplifiers are used in communications, radars, electronic countermeasures, and other applications at power levels from a f e w hondred watts to megawatts, at frequencies from dtmhigh frequency on up, and are particularly suited for high average powers. High gain, 30 to 60 dB, is normally achieved, and bandwidth usually lies m the 1-*percent range. Elementary theory of operation is desaibed, together with design considerations and systems interface information. Typical tube designs and data are presented. Recent developments are disprovements in bandwidth, periodic focusing, and beam control electrodes. Most of the basic design techniques are well developed, and emphasis is being shifted to improvements m the detailed performance characteristics such as gain and pbase response ripples, noise, and the sensitivities to operating voltages and currents. cossed, including h i g techniques ( t o 75 percent), im-All linear-beam tubes consist of a n electron gun and focusing structure used to generate a long cylindrical electron beam, an RF structure which provides gain and power output by interaction with the beam, and a collector where the unused beam energy is converted to heat. Tubes differ one from another principally in the characteristics of the interaction circuit. Its function may be described by the interaction impedance it presents to the beam as shown in Fig.

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Electrostatically-focused extended-interaction S-band klystron amplifier

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Novel techniques for the thermal management of space-based, high-power microwave tubes

Novel techniques for the thermal management of space-based, high-power microwave tubes

High-power linear-beam tubes

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