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We present the first results of linearity measurements made on a Ka-band traveling-wave tube (TWT) driver-booster combination consisting of high power, broadband coupled-cavity TWT (CCTWT) cascaded with a folded-waveguide power booster TWT (FWTWT).
A series of Ka-band Coupled-Cavity Traveling-Wave Tubes (CCTWTs) has been successfully developed, built, and tested at Communications and Power Industries (CPI) in collaboration with the Naval Research Laboratory (NRL) and SAIC. These devices represent a significant advance in the state-of-the-art of millimeter-wave CCTWTs, exploring the limits of power, bandwidth, and stability. We discuss the design...
We discuss the design and implementation of a waveguide coupler for a sheet-beam coupled-cavity structure. Discussion includes excitation of the fundamental mode with low VSWR, wide bandwidth, circuit sensitivity, and tuning. We conclude with a comparison with round-beam structure, and experimental results of sheet beam coupler.
We present the results of experimental measurements on an 18-beam S-band multiple-beam klystron. The electron gun has met its perveance design goal of 4.8 μPerv with very good beam transmission (>97% in the absence of rf). Preliminary rf testing has shown amplification across the full 400-MHz band (2.9 to 3.3 GHz). The MBK was recently re-gunned to correct a high pressure gas issue; further results...
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