Case Study: ESEO (Ecole Supérieure d’Electronique de l’Ouest) achieves 2.45 GHz wireless power scavenging with Keysight ADS (68% peak efficiency)

STMicroelectronics & ESEO Use ADS To Design a 2.45 GHz Wireless Power Scavenging Circuit

ESEO (Ecole Supérieure d’Electronique de l’Ouest) faced the challenge of designing a 2.45 GHz rectenna to scavenge ambient RF for IoT devices — a task requiring an extreme impedance transformation (antenna tens of ohms to several kiloohms) and compensation for Schottky diode nonlinearity and forward-voltage limitations. To address these issues, ESEO (with STMicroelectronics) turned to Keysight and its Advanced Design System (ADS) for design and simulation support.

Using Keysight ADS co-simulation — combining the Momentum 3D planar field solver with the Harmonic Balance circuit solver, plus diode package parasitic models and layout tuning — ESEO optimized the antenna+rectifier “rectenna.” The Keysight-enabled solution delivered measurable results: DC output down to −20 dBm and a peak RF–DC conversion efficiency of 68% at 20 dBm input (validated with a ~20 mm patch antenna).

ESEO

Mohamed Latrach

Head of the Radio-Frequency & Microwave Research Group