Small loop antennas parameters measurement in GTEM cell

Abstract

The antenna is an essential part of many electronic systems. Selecting the best antenna may be very important, but selecting the right antenna can be a difficult task, because of variation in the way manufacturers specify and describe them. This paper introduces a method to measure an antenna gain and antenna factor of small loop antennas. It is well known, that the antenna measurement in an anechoic chamber requests the calibrated reference antenna. Unfortunately, the space, cost, and time requirements for that chamber installation are quiet high. In this paper, GTEM cell has been proposed for this measurement as a more effective alternative, where the additional reference antenna isn't necessary. The principle of this method is described and the validity is asserted through measurements comparison of obtained results between GTEM cell and anechoic chamber.