A Dual Linearly Polarized Rectenna Using Defected Ground Structure for Wireless Power Transmission

In this letter, a new dual linearly polarized rectenna using defected ground structure (DGS) is presented. The rectenna is designed on the low-cost FR-4 substrates with the size of
$70 \times 70\,\,\text {mm}^{2}$
and works at 2.45 GHz. A high-order harmonic-rejection property is obtained and antenna miniaturization is realized at the same time by using the DGS. The rectifier’s maximum efficiency can be up to 83.7% when the input power is equal to 22.5 dBm. The efficiency for various polarization tilt angles can always be higher than 72.0% under the condition of the input power of 22.5 dBm.