Charging Time Characterization for Wireless RF Energy Transfer

Indoor Wireless RF Energy Transfer for Powering Wireless Sensors

For powering wireless sensors in buildings, rechargeable batteries may be used. These batteries will be recharged remotely by dedicated RF sources. Far-field RF energy transport is known to suffer from path loss and therefore the RF power available on the rectifying antenna or rectenna will be very low. As a consequence, the RF-toDC conversion efficiency of the rectenna will also be very low. B...

Optimal Battery Charging Methods for Wireless Power Transfer

Introduction Rechargeable batteries are present in a variety of devices. The act of recharging them generally involves a charger wired to a wall outlet being plugged into the device. The charger can determine the type of charge the batteries receive and therefore determine the cycle life of the batteries. Wireless power transfer is on the cutting edge of the battery charging world. There are el...

Simultaneous Wireless Power/Data Transfer for Electric Vehicle Charging

Rectifier Design Challenges for RF Wireless Power Transfer and Energy Harvesting Systems

The design of wireless power transfer (WPT) and energy harvesting (EH) solutions poses different challenges towards achieving maximum RF-DC conversion efficiency in these systems. This paper covers several selected challenges when developing WPT and electromagnetic EH solutions, such as the design of multiband and broadband rectifiers, the minimization of the effect that load and input power va...

Energy Efficient Data Transmission for Sensors with Wireless Charging

This paper studies the problem of maximizing the energy utilization for data transmission in sensors with periodical wireless charging process while taking into account the thermal effect. Two classes of problems are analyzed: one is the case that wireless charging can process for only a limited period of time, and the other is the case that wireless charging can process for a long enough time....