一、引言随着电子对抗和通讯技术的发展,迫切要求有一种高功率、抗干扰能力强的宽带放大器。行波管的宽带特性是众所周知的,这种特性在大功率、高频率时受到热耗散能力的限制。尤其功率大、频率高、尺寸小的行波管,散热问题更为突出,细小的螺旋线结构要散掉大的热量是急待解决的问题。 I. INTRODUCTION With the development of electronic warfare and communication technologies, there is an urgent need for a wideband amplifier with high power and strong anti-interference ability. The broadband characteristics of traveling wave tubes are well known, and this feature is limited by the heat dissipation capability at high power, high frequency. In particular, large power, high frequency, small size traveling wave tube, cooling problems are more prominent, small spiral structure to dissipate large heat is an urgent problem to be solved.