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NRL has developed and demonstrated a unique sheet-beam electron gun, which produces a 3.5-4-A, 0.3 × 4 mm electron beam at ∼20 kV. This electron beam has been successfully used to power multi-kW amplifiers at both Ka and W bands. The devices developed thus far employ a permanent magnet solenoidal field of 6 – 8 kG to transport the electron beam through the interaction circuit. While a periodic permanent...
A sheet-beam coupled-cavity traveling wave tube has produced over 10 kW of peak power at a center frequency of 34 GHz, with a 3-dB bandwidth of almost 5 GHz. The power of this amplifier is an order of magnitude higher than state-of-the-art conventional amplifiers of comparable frequency, bandwidth, and operating voltage (<20 kV). This unprecedented performance is made possible by a unique, NRL-developed...
NRL's unique sheet-beam electron gun, which produces a 3.5-4-A, 0.3×4 mm electron beam at ∼20 kV, has been successfully used to power multi-kW amplifiers at both Ka and W bands. The 94-GHz narrow-band EIK uses a 3-cavity circuit to produce a peak output power of over 7.5 kW, with saturated gain of ∼35 dB. The Ka-band amplifier uses a double staggered ladder coupled-cavity circuit to achieve a peak...
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