In this study, designing procedure of a monopole plasma antenna excited by microwave surface waves was investigated. Improving the antenna efficiency, the surfaguide structure was used as a surface wave launcher at 2.45 GHz which could produce a plasma column and increase the plasma conductivity. Moreover, the antenna was fed directly via the input connector instead of the coupling sleeve in the conventional feeds using capacitive coupling method. Using these two techniques, the antenna performance was increased and it reduces the loss due to the coupling power from the source to the plasma column. Plasma column was modelled using Finite Element Method (FEM) with COMSOL MULTIPHYSICS software. The antenna parameters such as return loss, radiation pattern and gain were investigated using CST simulation. The designing procedure was performed for monopole antennas with lengths of l = 62 cm and l = 32 cm which resonate at 145 MHz and 200 MHz, respectively. The simulation results show acceptable adaptation in respect to the experimental measurement and increase significantly in the antenna gain compared with the previous ones.

在这项研究中，研究了微波表面波激发的单极等离子体天线的设计过程。为了提高天线效率，将超导结构用作2.45 GHz的表面波发射器，可以产生等离子体柱并增加等离子体电导率。此外，在传统的使用电容耦合方法的馈电中，天线直接通过输入连接器馈电，而不是通过耦合套管馈电。使用这两种技术，可以提高天线性能，并减少由于从源到等离子体柱的耦合功率而造成的损耗。使用有限元方法（FEM）和COMSOL MULTIPHYSICS软件对等离子色谱柱进行建模。使用CST仿真研究了天线参数，例如回波损耗，辐射方向图和增益。l = 62 cm和l = 32 cm，分别在145 MHz和200 MHz处谐振。仿真结果表明，对于实验测量而言，其适应性是可接受的，并且与以前相比，天线增益显着提高。