Radio frequencies in bands around 28 GHz are being discussed as candidates for mobile communications of the fifth generation (5G). Beam steering will be a key feature in the context of 5G. It will be a major challenge to test the beam steering capabilities of base stations and user equipment in every phase from research and development through production. Conducted measurements will be mainly replaced by over-the-air measurements of electromagnetic radiation. Rohde & Schwarz offers the R&SĀ®NRPM Over-the-Air (OTA) Power Measurement Solution that perfectly fits such measurement needs. This application note contains theoretical background on OTA power and pattern measurements.