Ultra Miniaturized 24 GHz Wireless Sensor Nodes -- A Concept Study and First Results

This paper reviews realization concepts and achievements of wireless sensor nodes and focuses on new developments in the 24 GHz frequency range. The higher frequency offers the advantage of ultra miniaturization and therefore opens new application fields. On the other hand power consumption of the RF-front-end becomes still more challenging than at lower frequencies. It is shown that by applying very simple CMOS transceiver architectures and modulation schemes combined with efficient wake-up concepts very low energy consumption can be achieved. Technological realization concepts and first experimental results from a 24 GHz demonstrator are presented, too