Intelligent energy storage rf chip

How does a high-efficiency RF energy harvesting chip work?

A high-efficiency radio frequency (RF) energy–harvesting chip was designed and fabricated. With an off-chip antenna and rectifier, the system scavenges ambient RF energy and converts it into usable energy, which is then stored in energy storage elements (such as a supercapacitor or a rechargeable battery).

What is RF energy harvesting system?

Abstract: This paper introduces a fully integrated RF energy-harvesting system. The system can simultaneously deliver the current demanded by external dc loads and store the extra energy in external capacitors, during periods of extra output power. The design is fabricated in 0.18-μm CMOS technology, and the active chip area is 1.08 mm 2 .

What is RF input power sensitivity?

The measured RF input power sensitivity is -14.8 dBm at a 1-V dc output. This paper introduces a fully integrated RF energy-harvesting system. The system can simultaneously deliver the current demanded by external dc loads and store the extra energy in external capacitors, during periods of extra output power.

What is RF energy harvesting & wireless power transfer (WPT)?

In response, radio frequency (RF) energy harvesting (EH) and wireless power transfer (WPT) technologies have emerged as pivotal innovations, enabling wirelessly powered systems that extend devices’ lifetimes and reduce their maintenance costs.

Which resistor is fabricated off-chip?

The resistor R CH is fabricated off-chip and operates between 700 kΩ and 800 kΩ , depending on the type of the energy storage element. Fig. 7. The schematic of the charging circuit. BATT is where the energy storage element is connected.

Can a cold start system Harvest RF energy?

Although the system was optimized for harvesting RF energy, it can be easily adapted to harvest other energy sources (i.e., mechanical and thermal energy sources). Using an optimized cold start architecture, the circuit has a cold start voltage of 380 mV.