W波段回旋管谐振腔特性参数测量方法的研究  

Study on Measuring Method of Characteristic Parameters of Resonant Cavities for W-band Gyrotron

作　　者：曾旭[1] 王峨锋[1] 冯进军[1] 

机构地区：[1]北京真空电子技术研究所微波电真空器件国家重点实验室,北京100015

出　　处：《微波学报》2015年第4期47-50,共4页Journal of Microwaves

基　　金：微波电真空器件国家重点实验室基金(1110114)

摘　　要：W波段回旋振荡管是一种重要的高功率毫米波源,它通常采用圆柱开放式谐振腔作为其高频结构。谐振腔所具有的特性参数,如谐振频率和品质因数影响了整管的性能。在W波段,特性参数对于尺寸的变化特别敏感,因此,有必要对加工好的开放式谐振腔的特性参数进行测量。利用直接耦合法实现了对5组开放式谐振腔谐振频率和品质因数的无损检测,实验结果验证了该方法的可行性与有效性。同时,分析了加工误差对谐振腔性能造成的影响,结果表明,当开放式谐振腔渐变角度的加工误差达到7%以上时,谐振频率将偏移0.2GHz。W- band Gyrotron is an important source of high power millimeter wave,which usually use cylindrical open resonant cavities as its interaction structure. The characteristic parameters of a resonant cavity,such as resonant frequency,affect the properties of tube and are very sensitive to changes of the dimensions in W-band. It is necessary to measure the characteristic parameters of a resonant cavity which has been machined before assembling. A lossless measurement of resonant frequency and quality factor for 5 groups open resonant cavities is achieved by a method of direct coupling. The experiment proves the feasibility and effectiveness of the method. Afterwards,a study on impacts of machining errors on resonant frequencies has been done. The results indicate that the resonant frequency will offset 0. 2GHz,when machining error of the tapering angle reaches above 7%.

关 键 词：W波段 回旋振荡管 开放式谐振腔 谐振频率 品质因数 

分 类 号：TN12[电子电信—物理电子学]