New Design Of RF Rectifier Circuit For Radio Frequency Energy Harvesting

• Main Author: Mohamed Saaid J Sakek
• Language: English
• Published: 2023
• Subjects: RF Harvesting Energy

In recent years, the use of wireless sensor networks has increased newly. These sensors generally work with a limited life battery. This problem can be overcome by energy harvesting system, which converts energy from the environment into usable electrical energy. It can be used in applications such as remote patient monitoring, implantable sensors, machine device monitoring and so on. The dissertation presents a new design structure of RF-to-DC convertor, which is one of the key components of the RF energy harvesting system. The thesis also presents the various rectifier structures, which are the PMOS bridge rectifiers, and CMOS rectifiers. Furthermore, the design proposed is a CMOS structure with self-voltage cancelation (SVC) technique, which has been tested with different frequency bands, loads and uneven number of stages. The functionality of the CMOS rectifier structure is investigated by simulation using Cadence software with a chosen input signal of 920 MHz and is implemented in 130 nm technology. The simulation results show that there is a trade-off between high output DC voltage and high energy efficiency. In this paper, a three stages rectifier has been proposed and simulated resulting a maximum DC output voltage of 1.5 V at an input of -10dBm. On the other hand, the CMOS differential rectifier reaches a maximum energy efficiency of 32.4% at 100kΩ