Comparative study of envelope models for multi-tone simulation of traveling-wave tubes

Safi, Djamschid; Birtel, Philip; Meyne, Sascha; Jacob, Arne F.

doi:10.23919/eumc.2017.8230978

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2018

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“…This work extends the results presented in [9]. Three models, two of them frequency-dependent, are considered to extend prior physics-based steady-state simulation and assessed in comparison to measured TWT data.…”

Section: Introductionmentioning

confidence: 67%

Comparative study of envelope models for hybrid time- and frequency-domain simulation of traveling-wave tubes

Safi

Birtel

Meyne

et al. 2018

Int. J. Microw. Wireless Technol.

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A selection of hybrid frequency- and time-domain approaches is evaluated with respect to their suitability for predicting the multi-tone behavior of a reference Ku-band helix traveling-wave tube. For this, a frequency-domain code is extended by a selection of frequency-dependent and frequency-independent envelope models and compared to a number of simulated and measured responses to two-tone signal excitation with varying frequency spacing. The selected envelope methods are investigated both in the hybrid approach and based on measured TWT characteristics. Output levels and classical multi-tone metrics, such as intermodulation products and phase transfer factors, are considered. By reducing a modulation scenario to a number of significant sequences, a comparison to full physics-based frequency-domain simulation is presented to show the potential of the proposed approach.

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Section: Introductionmentioning

confidence: 67%