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In this paper, the application of metamaterial-loaded Vivaldi antenna in RF energy harvester is presented. The associated Vivaldi antenna was loaded with anisotropic zero-index metamaterial (ZIM), which was designed to enhance the radiation gain. Measured results show that the radiation gain of the antenna with the anisotropic ZIM was improved by 1.2 dB to 8.37 dBi at 2.45 GHz and the measured −10...
This paper presents a wideband collar-shaped antenna, which was designed for multiband RF energy harvesting. The antenna consists of two folded dipoles, which are laid on a circular FR-4 substrate. The center parallel-wire transmission line and marginal bent dipoles work together to provide a broadband feature. An additional reflector ground is employed to raise the antenna directivity and suppress...
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