This paper presents the design, simulation, and analysis of a compact rectenna system including antenna, matching network, and rectifier, for powering ultra-low-power IoT devices via ambient RF energy harvesting. The proposed solution targets operation in the 2.45 GHz ISM band and is implemented using PCB-compatible technologies. A planar inverted-F antenna (PIFA) with a coplanar stub achieves a compact footprint of 32.6 mm×16.87 mm while featuring a bandwidth of 110 MHz and a gain of 1.49 dBi. The rectifier employs a double-voltage Dickson topology optimized for a 5 kΩ load and -15 dBm input, showing a peak efficiency of 47.28% in the ideal lumped case and 46.58% when accounting for microstrip interconnections, with a footprint of 34.8 mm×10 mm. The complete rectenna system, including a distributed matching network, demonstrates reliable performance with a footprint of 67.4 mm× 16.87 mm. These results validate its suitability for battery-less or battery-assisted IoT applications.
Analysis, Design and Simulation of a Compact Rectenna System for Ultra-low Power IoT Systems
Porta A.;Noccetti E.;Bagnoli F.;Rossi D.;Saponara S.
2026-01-01
Abstract
This paper presents the design, simulation, and analysis of a compact rectenna system including antenna, matching network, and rectifier, for powering ultra-low-power IoT devices via ambient RF energy harvesting. The proposed solution targets operation in the 2.45 GHz ISM band and is implemented using PCB-compatible technologies. A planar inverted-F antenna (PIFA) with a coplanar stub achieves a compact footprint of 32.6 mm×16.87 mm while featuring a bandwidth of 110 MHz and a gain of 1.49 dBi. The rectifier employs a double-voltage Dickson topology optimized for a 5 kΩ load and -15 dBm input, showing a peak efficiency of 47.28% in the ideal lumped case and 46.58% when accounting for microstrip interconnections, with a footprint of 34.8 mm×10 mm. The complete rectenna system, including a distributed matching network, demonstrates reliable performance with a footprint of 67.4 mm× 16.87 mm. These results validate its suitability for battery-less or battery-assisted IoT applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
