A 2.4-GHz wireless sensor network using single diode rectennas

A novel RF power harvesting system is proposed for a fully wireless sensor network (e.g., monitoring home, office, etc). The proposed system allows various sensor networks for heat, smoke, humidity, etc. to operate continuously without the need for replacing batteries. The power receiver consists of a patch antenna, rectification system, and a power management circuit for voltage regulation. As a result, a wireless sensor can be operated from several meters away using nothing more than a simple internet router. This design offers ubiquitous integration of wireless power technology into daily sensing applications.