# Backward Energy Transmission in Resonant RF Energy Harvesters

## TL;DR

This paper explores how energy is lost in resonant RF energy harvesting circuits through backward transmission.

## Contribution

The study identifies and analyzes backward energy transmission in resonant RF energy harvesters.

## Key findings

- Some received energy in resonant circuits is retransmitted and lost.
- This backward transmission reduces the efficiency of RF energy harvesting.

## Abstract

RF Energy Harvesting (RFEH) circuits have been extensively researched in recent years. Researchers have proposed dozens of RFEH models with various architectures and topologies. Due to the small amount of energy available to be harvested, RFEH circuits must be as efficient as possible, both in terms of receiving energy and its further processing. Recent research has identified that in resonant circuits, some of the received energy is retransmitted and therefore lost.