Small Antenna Characterization in GTEM Cell

With the start of EM wave hazard evaluation from mobile towers, the E-field measurements become a point of increasing interest among people. Antenna characterization in terms of their radiation patterns is a key microwave measurement in precise E-field measurement. The probes used for E-Field measurements are calibrated as per IEEE 1309. This standard has been modified thrice in the last fifteen years, yet, it only discusses E-Field sensors and probes characterization and excludes antenna parametric study. In this paper, simulation of Vivaldi shape antenna is done using HFSS software and its parameters like antenna factor and gain are studied. Thereafter, measurements of these parameters are done inside GTEM cell and in free space. The simulated results are then compared with the measured results. The antenna factor and gain of the designed antenna has been calculated from this.