Development of Closed-Form Formula for Quick Estimation of Antenna Factor

In this paper, a novel method is introduced to compute the antenna factor parameter. The proposed approach is based on the equivalence concept of electric field radiation source and the receiver antennas in which the response at the antenna terminal is calculated efficiently with a simple equivalent circuit model. The most significant parameters affecting the antenna factor, such as polarization mismatch, reflection coefficient, antenna impedance, and the ground effect, are considered. To verify the introduced method's accuracy, four antennas are examined, and the obtained results are compared.