This paper covers the variation of electrical performance of air microstrip antennas due to its ground plane deformation. A typical sinusoidal function is utilized to characterize the shape of deformation, based on which different shapes of ground plane can be obtained by changing control parameters. From the simulation results by HFSS, there is a strong linear relationship between the offset of resonant frequency and the amplitude of deformation. The equivalent thickness of the air medium is introduced into the calculation model, and then the mathematical model is established to describe the resonant frequency offset and deformation amplitude. It can also be seen from the radiation pattern that the directivity decreases with the increase of deformation. The proposed method can be used to predict the effect of ground plane deformation on electrical performance of air microstrip antennas.

中文翻译：

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地平面变形对空中微带天线电性能的影响

本文介绍了由于接地平面变形而导致的空气微带天线电性能的变化。利用典型的正弦函数来表征变形的形状，在此基础上，可以通过更改控制参数来获得不同形状的接地平面。根据HFSS的仿真结果，谐振频率的偏移与变形幅度之间存在很强的线性关系。将空气介质的等效厚度引入计算模型，然后建立数学模型来描述共振频率偏移和变形幅度。从辐射图还可以看出，方向性随变形的增加而降低。