A Quad Band Antenna for RFEH From ISM Band, 5G Band, Wi-Fi Band, and Upper C-Band

RF energy harvesting is a technique to receive energy from the ambient environment. A quad band antenna with elliptical and circular with DGS is designed. The suggested antenna is capable of capturing radio frequency power from four different bands: 2.4 to 2.5 GHz (100 MHz bandwidth), 4.74 to 4.88 GHz (140 MHz bandwidth), 5.7 to 5.82 GHz (120 MHz bandwidth), and 7 to 7.9 GHz (900 MHz bandwidth). A variety of frequency bands, including the 2.45 GHz ISM, 4.8 GHz 5G, 5.8 GHz Wi-Fi, and Upper C-Bands, can be harvested by the suggested antenna. Maximum gains of 2 dBi at 2.45 GHz, 4.9 dBi at 4.8 GHz, 2.9 dBi at 5.8 GHz, and 5.1 dBi at 7.3 GHz are provided, accordingly, by the suggested antenna.