An Energy Harvesting Receiver Utilizing Microstrip Filter Technology for IoT devices in 5G Network

Energy scavenging from radiofrequency waves is getting more attention to energize low-power IoT sensors as the fifth-generation (5G) of wireless technology becomes mainstream. To efficiently extract energy from electromagnetic waves, the receiver antenna has to be properly matched with a rectifier to provide a steady dc output. A common solution is to design a matched bandpass filter with lumped LC components. However, in high frequencies using a conventional LC filter is not practical due to parasitic effects. In this paper, a 3rd order Chebyshev bandpass filter and a 5th order Elliptic function microstrip low-pass filter have been designed using Advance Design System (ADS). RO4003C material with a dielectric constant of 3.55 and height of 0.508 mm is utilized for the substrate. The Chebyshev filter shows perfect matching at 12-17 GHz. The Elliptic filter shapes the output of the rectifier, and the energy harvester provides 25 mW output with input power of -10 dBm and overall efficiency of 86%.