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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Comparative study of envelope models for hybrid time- and frequency-domain simulation of traveling-wave tubes
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Comparative study of envelope models for hybrid time- and frequency-domain simulation of traveling-wave tubes

机译：行波管时域和频域混合仿真的包络模型比较研究

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摘要

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.
机译：关于它们在预测参考Ku波段螺旋行波管的多音行为的适用性方面，评估了混合频域和时域方法的选择。为此，通过选择与频率有关和与频率无关的包络模型来扩展频域代码，并将其与模拟的和测量的对不同频率间隔的两音信号激励的响应进行比较。在混合方法中和基于测得的TWT特性对选定的包络线方法进行了研究。考虑了输出电平和经典的多音调指标，例如互调产物和相转移因子。通过将调制方案减少到许多重要序列，可以将其与基于物理的完整频域仿真进行比较，以显示该方法的潜力。

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