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We have studied a high impedance antenna in order to improve the rectifier efficiency for energy harvesting applications. Folded dipole antenna (FDA) with high impedance of over 10 kΩ is proposed. To obtain higher impedance stepup ratio compared with the conventional FDA, an FDA consisting with three strip conductors is investigated. Impedance stepup ratio is calculated and the results in theory,...
A simple measurement method for the balanced and unbalanced modal power ratios of a small antenna is proposed. Because the conductance corresponding to each mode can be calculated by applying the S-parameter method to the power dissipated at the antenna, the modal power ratio can be obtained by measuring only the 2-port S-parameters. In this paper, we demonstrate a simulation for the analysis of the...
A single-layer single-fed endfire antenna with circularly polarized radiation has been designed and evaluated. The concept is the superposition of two closely spaced complementary dipoles. In terms of implementations, a shorted parallel-plate cavity serves as the magnetic dipole, while double-side-printed conductor arms act as the electric dipole. To satisfy the required magnitude/phase relationship...
A meandered slot antenna is proposed without matching network. For size reduction, the meander-line configuration combined with slot dipole antenna was applied in tag antenna. Also, effects of the conductor area on the performance of the antenna are investigated for tag impedance matching. The proposed design is verified by simulation and measurement which show good agreement. The measured bandwidth...
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