Battery Technology

Dynamic Range Extender - Optimized circuit for high frequency energy harvesting

Ref.-No. 4979

Keywords: Energierückgewinnung, elekromagnetische Felder, Batterielebensdauer, energy harvesting, electromagnetic fields, battery lifetime

Possibilities exist to charge via the so-called "Energy Harvesting" batteries or to provide a direct source of energy. As an example: the energy of electromagnetic radiation in the 2.4 GHz band can be used for this. However, the efficiency of such devices decreases rapidly with decreasing power. The basic structure of the dynamic range extender is the balanced rectifier as it can be seen in the picture. It consists of a quadrature coupler and two rectifiers, even in a significantly lower power range (improvement by 10 to 15dB), a high efficiency in energy production can still be achieved


  • Simple construction
  • Enlarge the dynamic range
  • Higher efficiency at low power
  • Broad field of application

Commercial Application

The Dynamic Range Extender can be used in many areas. It can extend the life of electronic devices or provide power to sensors.

Status Quo

The invention has been applied for a patent. We are happy to inform you about the status of the proceedings. The procedure was verified experimentally. On behalf of RWTH Aachen, we offer interested companies the opportunity to license and develop the technology.

An invention of RWTH Aachen.

Dipl.-Ing. Andreas Brennemann
+49 208 9410533