摘要
本文研究了一种具有新型分立介质支撑的翼片加载螺旋带慢波系统 ,该种慢波系统具有较高的功率容量和较宽的带宽 .通过用切比雪夫多项式来展开螺旋带上的面电流 ,用真空层来模拟螺旋带的厚度 ,用均匀分层介质来等效新型分立介质支撑 ,考虑到过渡连接金属块的影响 ,用场论的方法得到了非常实用的色散方程和耦合阻抗的表达式 ,同时进行了HFSS模拟 ,发现用场论的方法所得出的结果与用HFSS模拟的结果吻合良好 .本文的结果对这种新型慢波结构的设计具有指导意义 .
A kind of novel tape helical slow wave structure (SWS) is supported by wedge-shaped discontinuous dielectric pillars and brazed with the helix and metal envelope through two metal connectors. The dielectric pillars exist only at the tape helix in each pitch. It has higher power capacity and broader bandwidth. The hybrid model for analyzing the tape helix is developed in this paper. In this model, by expanding the surface currents on the tape helix in a series of Chebyshev polynomials, simulating the helical radial thickness with vacuum layer, equalizing the discontinuous dielectric pillars with multiple azimuthally symmetric layers, assuming an infinite number of infinitely thin radial vanes and considering the metal connectors, the dispersion equation and interaction impedance of the novel helical SWS are obtained. In the meantime, the tape helical SWS is simulated by HFSS. The calculated results using the model presented in the paper show good agreements with HFSS simulation results. The theory presented here can provide a strong basis for designing the tape helical SWS.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2004年第9期1515-1519,共5页
Acta Electronica Sinica
基金
霍英东青年教师基金 (No .81 0 0 7)
自然科学基金 (No.1 0 2 760 1 1 )
