Non-Resonant E-Field Coaxial Probe for Very Near and Near Field Measurements

This paper proposes a non-resonant E-field probe consisting of open ended semi-ridged cable with partly shorted by conductor strip. Non-resonant and electrically small coupling aperture do not affect measured antenna characteristics in very near and near filed measurement. The principle of its single polarization characteristic is explained by showing electric field distributions near the aperture and the coupling with measured antennas are also presented. We fabricate prototype probe by semi-ridge cable of 3.58mm in diameter and evaluate its antenna factor by Near-field to Far-field transformation(NFFFT).