Circular Polarized Quasi-Self-Complementary Antenna for Spectrum Sensing and IoT

The proposed work exhibits the design and performance analysis of a circular polarized quasi-self-complementary antenna for spectrum sensing applications in modern wireless systems. The antenna exhibits dual band response in frequency ranges 3.82 to 6.47 GHz and 7.61 to 8.45 GHz. The antenna is circular polarized in the sub-6 GHz frequency range from 4.2 to 4.8 GHz. The identification of available spectrum is useful for dynamic allocation in 5G and higher technologies. The antenna proposed here has peak gain 3.5 dBic and an efficiency >80% and >70 % in the two bands. It has an electrical size equal to
$0.55\lambda_{0}\times 0.55\lambda_{0}\times 0.0024\lambda_{0}$
.