毫米波沟道梯型慢波结构行波管的线性理论
Linear theory of tunneladder traveling wave tubes
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摘要: 在电子通道内引入一薄层空心电子注，对沟道梯型慢波结构行波管进行了线性理论研究，推导出了沟道梯型结构行波管的工作色散方程，计算了沟道梯型行波管的小信号增益和工作相速。计算结果表明：沟道梯型结构行波管每周期的增益高，带宽窄；当沟宽度由零增加到环内径的2倍时，增益减小量不足1%，这表明沟宽度对增益的影响不大；当脊高度增大10%时，增益增加62%，当环内径增大10%，增益减小57%，因此增益与脊高度正相关，与环内径负相关，且相关性十分明显。Abstract: Through placing a thin hollow electron beam in the electronic tunnel of the tunneladder TNT, this article derived the linear theory of the tunneladder traveling wave tubes(TWT). A dispersion equation of the tunneladder TWT was derived, and the small signal gain and the working phase velocity were computed. The results manifest that the gain of the Tunneladder TWT is high, and the bandwidth is narrow. When the width of the channel varies from zero to the double of the ring radius, the linear gain decreases within 1%. When the ring radius augment 10%, the linear gain decreases 57%, and the ridge height augment 10%, the linear gain increases 62%. Thus, the width of the channel plays a small role on small signal gain, but the height of the ridge and the radius of the ring affect small signal g
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Key words:
- tunneladder twt /
- small signal gain /
- phase velocity /
- dispersion equation
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