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In the upper (FR2) mm-wave 5G frequency band, the coverage area of a single antenna is very limited. Therefore, many antennas with electronical steering capability are needed for a good quality of service. These antennas have to be cost-effective and reliable, such as reflectarray antennas. The developed 10x10 reflectarray antenna has a gain of approximately 10 dBi and a continuous steering range from -30° to 30°.

This paper presents the implementation of two easy-to-implement methods for radar imaging with a radar system on a linear drive for educational purposes. This method is a so-called synthetic aperture radar (SAR) approach which is commonly used in the space and aeronautical earth observation. In this paper the two methods are compared with each other and drawbacks and advantages are discussed.

Connected cars will be equipped with several wireless transmission technologies. The corresponding exposure of the general public will be significantly influenced by these technologies and must be correctly evaluated. A new measurement procedure suitable for the European vehicle communication standard ITS-G5 together with exposure measurements performed in different cars are described. In comparison with WiFi and Bluetooth, ITS-G5 generated the highest exposure inside a car.