基于电容加载的宽带小型化扼流结构的设计与研究

设计并研究了基于电容加载的宽带小型化扼流结构来抑制同轴线外导体表面的寄生电流。提出了能定量分析其扼流效果的通用性方法。此扼流结构与同轴线外导体相连,由两侧对称I型开缝的金属板组成,并在缝隙处加载电容使其实现小型化。其工作原理等效于一组串联的LC电路,当同轴线外导体外表面存在有寄生电流时,扼流结构的高阻抗特性会在一个宽频带内抑制电流的传导。该文对扼流结构的特性原理及理论基础进行了研究,结果表明此扼流结构能在5250~5925MHz范围内对寄生电流的传输特性有-12d B的抑制性能。

Design and Research of Broadband and Miniaturized Structure for Current Reduction Based on Capacitors Loaded

A broadband and miniaturized current reduction structure based on capacitors loaded is de- signed and researched.The complete design method is investigated,and the method is of generality.The structure,which is electrical contact with coaxial cable,consists of a metallic sheet with five pairs of sym- metrical I-shaped slots embedded,Lumped capacitors loaded for the purpose of miniaturize.The operation of the entire structure is similar to a series of parallel LC resonators.When the parasitic current flowing on the outer conductor of the coaxial cable,the property of the high impedance can suppress the current efficient- ly at the broad bandwidth.The characteristics and theory of the current reduction structure are also studied. The simulation results are shown that the structure can suppress the parasitic current at the 5250 5925MHz band for a -12dB transmittance.