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Miniaturization of patch antenna based on hybrid topology optimization

机译：基于混合拓扑优化的贴片天线小型化

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摘要

A hybrid topology optimization method that combines the scalar isotropic material with penalization and the level set method is utilized to achieve the miniaturization of patch antennas while maintaining good radiation and polarization characteristics. In order to achieve this goal, the Heaviside projection filter is applied to obtain topologies that are more complex. Both the radiation power and the reflection coefficient of the antenna are utilized as sub-objectives. Besides, by setting the radiation patch to be symmetrical, not only the numbers of optimization variables and optimization sub-objectives are reduced, but also the cross-polarization level is suppressed effectively, so that the optimization is accelerated. The optimized patch antenna achieves good performance in patch size, impedance matching, radiation pattern, gain, and polarization characteristics. Compared with the reference patch antenna, the patch size of the optimized antenna is reduced by 63%, while the maximum realized gain and efficiency remain basically unchanged, achieving more than 5.9 dBi and 90%, respectively. Due to its very small size patch, the antenna is particularly suitable for compact multi-antenna and antenna array applications.
机译：一种混合拓扑优化方法，其结合了标量子级材料与惩罚和水平集合方法用于实现贴片天线的小型化，同时保持良好的辐射和偏振特性。为了实现这一目标，施加沉重的投影滤波器以获得更复杂的拓扑。天线的辐射功率和反射系数都被用作子目标。此外，通过将辐射贴​​片设置为对称，不仅减少了优化变量和优化子目标的数量，而且有效地抑制了交叉偏振电平，从而加速了优化。优化的贴片天线在贴片尺寸​​，阻抗匹配，辐射模式，增益和偏振特性方面实现了良好的性能。与参考贴片天线相比，优化天线的贴片尺寸减少了63％，而最大的实现增益和效率仍然基本不变，分别实现了5.9 dBi和90％。由于其非常小的尺寸贴片，天线特别适用于紧凑的多天线和天线阵列应用。

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