Top four benefits of using radiofrequency energy harvesting and latest developments

Over the last two years, energy harvesting technology has made significant progress, particularly in the area of radiofrequency (RF) energy harvesting, which has seen a two to threefold increase in its energization range capabilities allowing a whole new range of usages.

Today, Paragon ID is able to energise up to 25 metres Ultra-Wideband (UWB) and Bluetooth Low Energy (BLE) battery-less devices, by simply using standard off-the shelves low-cost RFID or Wi-Fi sources.

This growth has been fueled by advances in technology and breakthrough architectures enhancing the sensitivity of energy harvesters, making it possible to harvest energy from the radio frequency waves that permeate our environment in factories, in city centers or at home.

One of the primary advantages of RF energy harvesting is that it allows for the embedding or moulding of devices, such as trackers, in products or containers. This makes the devices invisible, tamper-proof, and physically resistant to damage such as scratches. Additionally, devices powered through RF energy harvesting are automatically waterproof, removing the need for additional waterproofing measures and bringing down their costs.

Another significant benefit of RF energy harvesting is that there is no need to replace batteries. The feasibility of replacing numerous batteries in an operational flux is often a barrier, and the cost of battery replacement is often very high due to the resources required and the impact on operations when replacement is needed. This means that devices powered through RF energy harvesting can operate without interruption for extended periods, saving costs and reducing operational disruption. Achievable lifespans are comparable to what is typical today for passive RFID tags, so 20 years or more.

RF energy harvesting can operate at a wider range of temperatures than standard low-cost batteries. The normal performance operation range of standard batteries is typically 0-50°C, whereas energy harvesting powering can operate across a broader temperature spectrum (typically -40°C to 100°c). This makes it particularly useful in harsh environments, such as explosive environments requiring ATEX certification. In these settings, battery-powered trackers require costly design modifications.

In addition, RF energy harvesting provides a more environmentally friendly solution than batteries. Li-ion or Ni-Cad batteries contain toxic components, and over 50% of small batteries are not recycled today. By using RF energy harvesting, companies can reduce their environmental impact and comply with ESG regulations.

The aerospace, automotive, and consumer electronics industries are just a few examples of industries that will greatly benefit from using RF energy harvesting. In the aerospace industry, it can power sensors that monitor the structural health of airplanes. In the automotive industry, it can be built into sensors that monitor tire pressure and vehicle performance.Furthermore, RF energy harvesting can benefit the consumer electronics industry by powering wearable devices and smart home sensors.

The MADRAS project, in co-operation with leading manufacturers and research centres, has developed the world’s first battery-less UWB and sensing flexible tag for logistics and industrial applications, based on new advanced and organic materials.

In conclusion, the benefits of using RF energy harvesting in low-power electronic devices are very significant and diverse. By using RF energy harvesting, companies can reduce costs, comply with ESG regulations, and operate more effectively in harsh environments.