A novel circular polarized rectenna with out-of-band suppression is proposed in this paper. The circular polarization is realized by\ncorner perturbation on a rectangular radiation patch and enhanced by a diagonal slim slot etched at the center of the patch. An\nopen stub connecting to the quarter wavelength impedance transformer is used to suppress out-of-band wave through harmonics\nnotching. The results of simulations and experiments agree very well, which show that the rectenna obtained âË?â??19 dB return loss at\n2.4GHz and âË?â??15.5 dB, âË?â??18.1 dB, and âË?â??11.4 dB suppression on second, third, and fourth harmonic frequency bands, respectively.The\nreflection coefficient in overall out-of-band, up to 10GHz, is limited up to âË?â??3 dB. Integrated with a voltage doubling rectification\ncircuit, the proposed rectenna can obtain 75.5% RF-to-DC conversion efficiency.
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