Simple wake-up radio prototype

Today more and more wireless sensors are powered by batteries. To avoid frequent battery replacement and to provide easy maintenance, sensor nodes should operate energy-efficiently. One well-known and significant source of energy drainage is radio idle listening. One common method to avoid idle listening, is to design MAC protocols that max-imise the sleeping time and minimise the duty cycle of the radio. An alternative approach is to utilize hardware solutions such as a wake-up radio. The wake-up radio is designed as an ultra low-power radio, which is always on, and which triggers the sleeping device when communication with the device is required. This paper reports on the design, implementation and performance measurements for a simple wake-up radio construction with 4.7 µW power consumption