Since the first mobile terminals and phones entered the market, many works on their actual coverage in the network have been carried out and troubles with the coverage reported. Now we have 5G advanced systems and the coverage is surely much better, but is the problem of good coverage everywhere solved? The talk will give a historical overview of the development of the methods used for evaluating the ability of a mobile phone to provide good coverage, including the vast experimental setups used and concluding with the Over The Air (OTA) measurements used worldwide today. Results of OTA performance evaluation of mobile phones done over the years for the Danish authorities will be shown, including the latest report listing the most popular phone models from spring 2023. Also the latest experimental setup in Aalborg will be shown — a large anechoic room which can take objects up to 3500 kg and measure all frequencies from around 100 MHz to THz. Examples of large constructions which can be measured are given; Wind turbine blades, live fighter jets and surely cars.
In parallel, the presentation also includes our recent work in applying artificial intelligence (AI) in antennas. Our research focuses on generative antenna design and optimization, antenna array diagnosis and calibration, and the linearization of active antenna arrays. This integrated approach demonstrates how advanced OTA measurement techniques combined with AI-driven innovations can accelerate the development of next-generation communication systems.