The challenge of electromagnetic field measurements for modern 5G Devices

This overview paper shows the challenges for antenna measurements facing with 5G devices. The new antenna related technologies: higher frequency bands to millimeter bands, broadband, new technologies as distributed MIMO, massive MIMO, phased arrays, adaptive beamforming or the fact that the sensors are fully integrated to the telecommunication system makes a real challenge the characterization of the antennas themselves. The figure of merit of interest for the users will be much more complicated than the far field performance. In fact, much of these devices will be interconnected in near field, not only in far field, and basically the interest will come in the reduction of the bit error rate and the increase of the capacity. All these facts make necessary to use Over the Air measurement systems, increasing the measurement speed (real time) and increasing the accuracy for measuring the millimeter frequencies