Power Density Evaluation of Simulated and Measured Data Based on Equivalent Currents Method

In 5G applications, commercial devices must be tested to verify compliance of the electromagnetic field (EMF) emission with the relevant EMF exposure limits in terms of peak average power density [1]–[3]. Proximity to the device testing is required for frequencies above 6 GHz [4]. This procedure, for 5G beamforming DUT, can require very long measurement times. To overcome this limitation a fast technique has been recently presented [5]–[7]. This technique combines Near Field (NF) measurements with the equivalent currents (EQC) method [8]–[9]. Thus, starting from a NF measurement of the DUT, the technique allows to evaluate power density, at any distance from the Device Under Test (DUT). This would allow to verify the pre-compliance of the DUT with EMF exposure limits. In a previous study, validation was performed on a Dual Ridge Horn [5]. In this paper, a Closed Boundary Quad-Ridge Horn is considered. Results and achievable accuracy are presented.