Optically transparent electromagnetic applications, such as EMC windows, require high optical transparency (OT) while maintaining good electrical performance which is difficult to achieve with conventional transparent electrodes (TEs). In this paper, we proposed a novel planar saltwater as a solution to overcome the difficulty. The electrical and optical characterizations of the planar saltwater are experimentally investigated with good agreement to theoretical prediction. The saltwater has a high average OT of 91.8% which is highest among conventional TEs. Moreover, the planar saltwater shows a shielding effectiveness (SE) above 22 dB with only 3 mm of thickness in the C-band. The SE can be significantly improved by an increase in the thickness of planar saltwater. Along with other advantages of cheap, safe, easy access, and flexible performance, the saltwater can be considered as a potential candidate for transparent electromagnetic shielding applications.

诸如EMC窗口之类的光学透明电磁应用需要高光学透明度（OT），同时又要保持良好的电性能，而传统的透明电极（TE）很难做到这一点。在本文中，我们提出了一种新颖的平面盐水作为解决该难题的解决方案。实验研究了平面盐水的电学和光学特性，与理论预测吻合良好。盐水的平均OT较高，为91.8％，在常规TE中最高。此外，平面盐水在C波段的厚度仅为3 mm时，显示出22 dB以上的屏蔽效果（SE）。该SE平面盐水厚度的增加可以显着改善。除了便宜，安全，易于访问和性能灵活的其他优点外，盐水还可被视为透明电磁屏蔽应用的潜在候选者。