Calibration of Broadband Antenna Using the Standard Field Method With VNA Considering the Near Field

We proposed a standard electric field method using a VNA with an equation that takes into account the nearfield conditions of the electric field radiated from the transmitting antenna and compensates for the effect of the input power reflection of the transmitting antenna. Furthermore, the absolute gain of a conical monopole antenna with doubleBoltzmann tapered-line (DB-CMA) upto 20 GHz was measured using this method. As a result, although the average absolute gain of DB-CMA from 1 GHz to 20 GHz was slightly lower than that of tuned monopole, the DB-CMA has a broadband property and is suitable for measuring transient electromagnetic fields such as ESD electromagnetic fields.