Abstract
Broadband absorber can achieve zero transmission, small reflection and high absorption in a certain frequency band. However, the design of high-performance broadband absorbers remains a challenge. Taking advantage of the broadband superposition property of a simple structure, we propose a conformal and transparent broadband microwave absorber, which consists of multi-layer polyethylene terephthalate (PET) dielectric layers, indium tin oxide (ITO) patches and loops. The absorber has an absorptivity of over 90 % in the range of 12.78–69.16 GHz, along with polarization stability and ±50° angle of incidence insensitivity. Experimental results indicate that the numerical simulation and actual performance show good agreement. In addition, the properties of flexibility and optical transparency are expected to be applied in scenarios such as curved surfaces and portholes.
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