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Nonlinear Phase Shift in Traveling-Wave Tubes as Applied to Multiple Access Communications Satellites

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2 Author(s)
Berman, A. ; Communications Satellite Corporation, Washington, D.C ; Mahle, C.E.

A modern communications satellite typically amplifies many frequency-modulated radio-frequency carriers in a single common amplifier. The nonlinear phase versus input power behavior of traveling-wave tubes (TWT) and its impact on intermodulation noise and intelligible crosstalk is treated. A theoretical model is presented, which allows calculation of the multicarrier performance of the TWT, and an experimental verification of the model is given.

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Communication Technology, IEEE Transactions on  (Volume:18 ,  Issue: 1 )