Low frequency rectenna system for wireless charging
a low-frequency wireless charging and rectenna technology, applied in the field of wireless charging of battery enabled devices, can solve the problems of genetic damage, more detrimental biological effects on exposed tissues, etc., and achieve the effect of increasing energy efficiency, reducing power consumption, and reducing the number of charges
Inactive Publication Date: 2018-02-01
AMI RES & DEV
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Benefits of technology
This patent describes a wireless charging system that uses RF power transmission at low frequencies to avoid the safety concerns associated with microwave frequencies. The system uses a circularly polarized transmit antenna that provides hemispherical coverage and directional cardioid-like patterns. The power is received through a parasitic loop element or a separate loop receive element. The effective area of the system is much greater than the physical area, which reduces the required incident field for charging while still keeping the safe human exposure limit low. Overall, the system provides a safer and efficient wireless charging solution.
Problems solved by technology
Scientific research has shown that the higher frequency electro-magnetic fields interact more strongly with human tissue and have a more detrimental biological impacts on exposed tissues.
Method used
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Circular Polarization RF Wireless Charging
[0026]An antenna based energy transmission system as described herein, and can be seen in FIG. 1. The system includes a transmitter 104 and a receiver 101. Energy is transmitted via radio waves between the transmitter 104 and the receiver 101. The receiver 101 detects 107 and / or rectifies 108 the received signal to extract a power signal, and uses it for some purpose, for example, to recharge a battery 109 or to power some electronic device.
[0027]The battery109 may be installed in any receiver device 101, for example a portable radio, a cell phone, a smart phone, a PDA, a tablet, a laptop computer, a smart watch, a tag, or a number of Internet of Things devices; as well as other devices that currently are not smart devices, such as a flashlight, interior and exterior ornamental lighting, children's toys, tools, etc. In some embodiments, this technique may be used to power devices directly without incorporating a battery, or could be used to ...
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A human safe wireless charging system using a circularly polarized source antenna that can radiate in either a hemispherical pattern or directional cardiod-like patterns at a 40-50, 150, or 200 MHz frequencies to a receiving loop antenna which is coupled to a parasitic receive element.
Description
RELATED APPLICATIONS[0001]This patent application claims priority to U.S. Provisional Patent Application No. 62 / 352,186 filed on Jun. 20, 2016 by John T. Apostolos et al. entitled Low Frequency Rectenna System For Wireless Charging and U.S. Provisional Patent Application No. 62 / 372,355 filed on Aug. 9, 2016 by John T. Apostolos et al. entitled Low Frequency Rectenna System For Wireless Charging, both of which are hereby incorporated by reference.BACKGROUND OF INVENTIONTechnical Field[0002]The present application is directed to the charging of electronic devices, and in particular to the wireless charging of battery enabled devices.Description of the Related Art[0003]Since the beginning of the mobile radio era, users have been plagued with limited battery life and the chore of plugging their devices into a charger. Where radios and wireless devices have separated the user from wires to transmit data, these devices remained chained to chargers for power.[0004]In recent years, there ha...
Claims
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Login to View More IPC IPC(8): H02J50/27H01Q7/00H01Q9/16H02J7/02
CPCH02J50/27H02J7/025H01Q7/00H01Q9/16H02J50/23H02J7/00043H02J7/00
Inventor APOSTOLOS, JOHN T.LOGAN, JAMES D.MOUYOS, WILLIAM
Owner AMI RES & DEV