Optimum microstrip antenna for the use of rectana in the band GSM

In this article, a rectana microstrip antenna with optimal dimensions in the GSM band is proposed to harvest Rf energy and convert it into electricity. The proposed antenna is a special model of bow-tie antenna whose triangles are placed at 90 degrees to each other and it is fed in dipole form with SMA connector. The dimensions of the antenna are 10 x 10 cm with an FR4 substrate with a thickness of 1.6 mm, which is designed to receive in the GSM frequency band, i.e. 900 and 1800 MHz. The recommended antenna gain is 1.8dBi. The advantage of the proposed antenna compared to the examined antennas is the high efficiency of the RF to DC converter circuit and its small size. So that the efficiency factor obtained for it is 76%, which is 12% more than the previous examples. Also, the volume occupied by the proposed structure is at least 87.2% less than the structures presented in other references for this frequency band. On the other hand, due to the flatness of the proposed structure, this antenna has the ability to be used on flat surfaces such as the wall or body of various objects, while the antennas proposed in other references are 3D and lack this capability.