A Wide Power Dynamic Range High Efficiency Triple-path Charge Pump System for RF Energy Harvesting Applications

Abstract

This paper proposes an ultra-wide power dynamic range (PDR) charge pump system for RF energy harvesting, operating at 2.45 GHz, with three selectable operating modes. Two distinct RF-DC rectifiers are designed to deal with low-power, mid-power and high-power conditions, and a basic control circuit is used to select the operating mode, thereby expanding the input power range over which high power conversion efficiency (PCE) is also maintained. The proposed charge pump system was simulated using a standard 0.18 μm CMOS process, achieving a sensitivity of -21 dBm and a peak PCE of 61.4% at -10 dBm. When operating at 2.45 GHz with a 100 kΩ load, the proposed charge pump maintains a PCE above 20% over an input power range of -22 dBm to 7 dBm.

Zeyu Yang

Master’s Student

My research interests include circuit design of charge pump and radio frequency energy harvesting system.

Yichen Zhang

Master’s Student

My research interests include circuit design of low dropout regulator and hybrid energy harvesting system.

Weijie Ge

PhD Student

My research interests include the design of radio frequency integrated circuits and energy harvesting circuits.

Jian Guan

PhD Student

My research interests include the design of solar cells and energy harvesting circuits.

Xinying Su

Master’s Student

My research interests include circuit design of CMOS memristor simulators and neuromorphic chips.

Jingjing Liu

Associate Professor

My research interests include low-power smart micro-sensor integrated circuit design, image sensors, biomedical sensors, and energy harvesting circuits.