The use of mesh filters for millimeter-wave applications using capacitive and inductive grids is well known, and they are widely used in cosmic microwave background instrumentation. We report on an investigation into whether the capacitive square shape typically used in low-pass filter designs could be improved. The microgenetic algorithm and the finite-difference time-domain, and electromagnetic modeling method were used to look for shape variations to the standard square shape. Any shape changes discovered were then analyzed to establish which variations had the most effect. We show that improvements found using pixelated patterns evolved by the genetic algorithm were somewhat mixed.

中文翻译：

---

毫米波应用的网状低通滤波器：方型电容形状是否最佳？

众所周知，在使用电容性和电感性网格的毫米波应用中使用网状滤波器是众所周知的，它们已广泛用于宇宙微波背景仪器中。我们报告了有关是否可以改善低通滤波器设计中通常使用的方形电容的调查。使用微遗传算法和时域有限差分法以及电磁建模方法来寻找标准方形形状的变化。然后分析发现的任何形状变化，以确定哪些变化影响最大。我们表明，使用遗传算法进化的像素化模式发现的改进有些混杂。