Light filtering is an important aspect of device technology. It can be accomplished by various techniques viz., microwave filters: lumped-element inductive capacitive filters, planar filters, coaxial filters, cavity filters, dielectric filters, electro-acoustic filters, waveguide filters and energy and tunnelling-based filters. All the above conventional filters suffer from various inconsistencies arising from their individual active and passive components. We report a technique of IR filtering using ferroelectric liquid crystal; this technique may also be extended to other types of liquid crystals. The hydrogen bonded ferroelectric liquid crystal used in this technique is derived by mixing dodecyloxy carboxylic benzoic acid to dextro tartaric acid and is discussed. In the present communication, observation of light filtering action in the three notch filters of various frequencies in the region of (10–80 GHz) is examined.

滤光是设备技术的重要方面。它可以通过各种技术来实现，例如微波滤波器：集总电感电容滤波器，平面滤波器，同轴滤波器，空腔滤波器，介电滤波器，电声滤波器，波导滤波器以及基于能量和隧穿的滤波器。所有上述常规滤波器都因其各自的有源和无源组件而引起各种不一致性。我们报告了一种使用铁电液晶进行IR滤波的技术。该技术还可以扩展到其他类型的液晶。该技术中使用的氢键合铁电液晶是通过将十二烷氧基羧酸苯甲酸与右旋酒石酸混合而得到的，并进行了讨论。在本来文中，