新型大功率毫米波螺旋线行波管高频系统研究
doi: 10.3724/SP.J.1146.2005.01462
Study of Novel Slow Wave Circuit for Millimeter Wave Power Helical TWT
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摘要: 该文探讨了CVD金刚石材料在宽带毫米波螺旋线行波管中的应用，研究了两类非杆状新型CVD金刚石夹持的螺旋线高频结构，利用MAFIA分析了它们的色散特性、耦合阻抗和衰减常数，与传统的矩形BeO夹持杆和矩形CVD夹持杆高频结构进行了对比，最后将这两类新型高频结构替代国内某毫米波行波管(26-40GHz)中的矩形BeO夹持杆螺旋线高频结构，利用宽带大功率行波管CAD集成环境中的注波互作用模块分析了其大信号工作特性。结果表明，分立CVD金刚石夹持高频系统兼顾了超宽带和大功率，同时由于金刚石直接和螺旋线及金属翼片大面积接触，该结构还具有极好的散热能力，是一种有重要应用前景的高频结构。Abstract: CVD diamond material, applying in broad band millimeter wave helical Traveling Wave Tube (TWT), is discussed. Two kinds of novel helical slow wave circuit, supported by CVD diamond, are presented. Dispersion, interaction impedance and attenuation of these circuits are simulated by MAFIA, compared with circuit supported by BeO rods. Nonlinear beam and wave interaction of the TWTs, replaced slow wave circuit supported by BeO rods with new circuit, are analyzed using BWI module in TWTCAD Integral Framework, which is a suite of helix TWT design code. The results show that Stud-Diamond helical slow wave circuit has broader band and excellent cooling capability is implied, it should has important apply to broad band millimeter wave power helical TWT.
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