Plane Wave Spectrum Method Applied on Radiated Magnetic Field from RFID Reader Antenna

Abstract

Near electromagnetic field characterization for radiating devices requires the 3D field mapping in the space near this device, especially for dosimetric applications. In this work we present the plane wave spectrum (PWS) method to extract the 3D magnetic field components from the transverse ones, in addition to the extraction of the filed at different planes above the device under test (DUT). This operation was performed on an RFID reader antenna operating at 13.56 MHz that was designed and simulated on HFSS (high frequency structural simulator). Good agreements were found by comparing the theoretical, simulated, and extracted magnetic field quantities at different heights.