利用衰减钮扣抑制耦合腔行波管的上边频振荡

耦合腔行波管由于其结构的特点，很容易产生白激振荡。采用在耦合腔腔壁中安装衰减钮这一谐振损耗技术可以有效地抑制耦合腔行波管中常见的带边振荡。但在实际应用中，遇到了满足要求的衰减钮扣的衰减材料的相对介电常数过小而不能制备的情况，此时通过改变衰减钮扣的结构——变实心衰减钮扣为衰减环，可以成功的解决这一难题。本文主要对这一方法的基本理论和在实际中的具体应用进行论述。

Application of Loss Button in Suppressing Band-Edge Oscillation in CCTWTs

The spurious oscillation in CCTWTs easily occurs for its special structure. The common band-edge oscillations can be effectively suppressed by fixing the loss button in the sidewall cavity which is a main method of resonant loss technique. Practically, when the loss button is solid, the proper relative permittivity of the loss material is too low to be made. This roadblock can be moved by replacing the solid loss button with loss ring. Basic theory and practical application case of this method will be discussed in this paper.