A Wideband <i>E_zE_x </i> Field Probe Integrated With a Strip Line Magic-T

Abstract

A wideband <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">E_zE_x</i> probe covering the frequency range of 1.4 - 7.0 GHz is proposed through the integration of a strip line magic-T. By combining a Marchand balun with its complementary structure, the magic-T achieves a wide working frequency band. The magic-T can effectively streamline the complex data processing, enabling the proposed probe to offer a flexible instrument selection and achieve high measurement efficiency. A new calibration kit is further developed for the proposed probe. It effectively addresses the challenges associated with the asymmetry and probe movement commonly encountered in traditional probe calibration. A prototype of the probe is fabricated and measured. The results demonstrate a wide 1:5 working band, over 23 dB unwanted field suppression, and a good isotropy.