Calibration of calculable wideband direct feed biconical antenna for EMC measurements

Abstract

An optimized wideband biconical antenna is presented for EMC measurement which potentially can be used as a standard-reference antenna. The antenna is "direct-fed" (no Balun is needed) with optimized dimension to match with 50 Ω coaxial cable from 200 MHz to 2 GHz. Radiation pattern of the antenna indicates that the common mode current existing on the coaxial cable is negligible. Meanwhile, the biconical antenna has a fixed phase-center for the various frequencies and the related uncertainties can be improved. The antenna factors (AF) of the antenna have been evaluated using analytical and numerical methods. Experimental "Standard Antenna Method SAM" has been used to verify the theoretical results and good agreements were observed.

Investigation of Broadband Printed Biconical Antenna with Tapered Balun for EMC Measurements

“…The antenna factor plays a critical role in measuring how useful the antenna is for use as a reference antenna for EMC measurements. Antenna factor can be defined as the ratio between the incident electrical field and the received voltage [33,34]. Equation ( 1) is used for calculating the antenna factor from the simulated and measured gain, respectively [35].…”