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矩形栅慢波系统的理论与实验研究

消耗积分:3 | 格式:rar | 大小:261 | 2009-05-24

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为了克服单模近似法在分析矩形栅慢波系统高频特性时的局限性,采用了一种新的方法,即在表示槽区内的场时,保留其高次项,表为一无限本征驻波之和的形式,利用场匹配法得到其色散特性,进而求得耦合阻抗。然后针对矩形栅慢波系统进行了数值计算,并分析了金属栅的几何尺寸对系统高频特性的影响,以作为器件设计的参考。设计出3cm、8mm波段的矩形栅高频结构模型,进行实验测量,得到的实验值与理论值符合良好。

In order to overcome the limit of Single-Mode Approximation (SMA), this paper adopts a new method that when expressing the fields inside the grooves, the higher orders are retained as an infinite sum of standing eigen-waves. The dispersion relation is obtained by field-matching method, while the coupling impedance is subsequently obtained from the relevant equations. A lot of numerical computations and analysis are done for rectangular grating slow-wave system. And the effects of the geometrical characteristics of the grating are analyzed. Finally, rectangular waveguide gratings at 3 cm band and 8 mm band are designed and measured, experimental values match theoretical values very well.

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