论文部分内容阅读
空间行波管推向饱和工作时,其传输特性变得越来越非线性,将导致非线性失真。双渐变螺旋线慢波结构是目前最常用的既能提高效率又能减小非线性失真的慢波结构。本文在双渐变结构的基础上,提出了多渐变结构,分析新增渐变段对空间行波管工作状态的影响。通过多线路参数优化设计,K波段空间行波管在保证输出功率和效率几乎不变的情况下,非线性失真明显降低。相移由51.6°减小到20.8°,AM/PM值由3.9°/d B减小到1.9°/d B,并且电子效率几乎没有发生变化。
When the space traveling wave tube is pushed to saturation, its transmission characteristics become more and more nonlinear, which will lead to nonlinear distortion. The double-gradient spiral slow-wave structure is the most commonly used slow-wave structure that can not only improve the efficiency but also reduce the nonlinear distortion. Based on the double-gradient structure, this paper proposes a multi-gradient structure, and analyzes the influence of the newly-added gradient section on the working state of TWT. By optimizing the design of multi-line parameters, the nonlinear distortion of the K-band space traveling-wave tube is obviously reduced under the condition of keeping the output power and efficiency almost unchanged. The phase shift decreased from 51.6 ° to 20.8 °, the AM / PM value decreased from 3.9 ° / d B to 1.9 ° / d B, and there was almost no change in the electron efficiency.