23 July 1993 Smart coating materials for frequency-selective surface
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An effort in designing and manufacturing a tunable frequency-selective multilayer coating material is reported. When a material (metallic or dielectric) is coated with such a composite layer, the reflection from this coated surface will follow a particular frequency spectrum which is application oriented. In addition, to achieve the required temporal frequency response, voltages of different magnitudes can be applied to different layers of the composite coating material at a different time. Because the dielectric constants of a number of layers can be altered temporally under this tuning process, the coated surface will respond to the observer in a specific manner at a given time. A multilayer coating whose constituent layers are made of different Porous Barium Strontium Titanate materials (BST) can provide great freedom and an unprecedented advantage in the design work. We can tailor and tune the properties of BST materials used in each layer provided these materials can be actually made in our research center. In addition, to satisfy the required spectral response, the detailed dispersion characteristics of the coating properties can be achieved by introducing sandwiched dielectric composite layers.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yushieh Ma, Yushieh Ma, Vijay K. Varadan, Vijay K. Varadan, Vasundara V. Varadan, Vasundara V. Varadan, } "Smart coating materials for frequency-selective surface", Proc. SPIE 1916, Smart Structures and Materials 1993: Smart Materials, (23 July 1993); doi: 10.1117/12.148489; https://doi.org/10.1117/12.148489

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