Magnetic Amplitude and Gradient Probe System (MAGPy)

What is MAGPy?


SPEAG’s Magnetic Amplitude and Gradient Probe System (MAGPy) is a cutting-edge all-in-one instrument for fast and reliable compliance testing according to the basic restrictions for wireless power transfer (WPT) systems and any other near-field sources operating at frequencies of 3 kHz − 10 MHz. The device is constructed of 24 small time-domain (TD) loop sensors arranged on the corner of a cube for determining the magnetic (H/B) amplitude and gradient and three dipole sensors to measure the electric (E-) field amplitude. Conservative estimates of the induced E-fields, current density, and specific absorption rate (SAR) in the human body at any position are compared to the basic restrictions, while the incident H/B- and E-fields are compared to the reference levels and displayed in real time in the time or frequency domain (FD) on the intuitive graphical user interface (GUI). By comparison with basic restrictions it lowers the overestimation introduced by compliance testing with reference levels by up to 40 dB.  MAGPy is fully compatible with the latest IEC standards.


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