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US 7,606,540 B2Granted
Apparatus and method for using ambient RF power in a portable terminal
AssigneeSamsung Electronics Co., Ltd.
InventorSeong-Ho Yoon
Life of this patent
Estimating the term…
Abstract
An apparatus and method for using ambient RF power in a portable terminal are provided. In the charging apparatus, an antenna array receives RF signals left derelict in the air, a rectifier rectifies the RF signals to DC voltages, and a power storage stores the DC voltages as power.
Claims9
An apparatus for using ambient radio frequency (RF) power in a portable terminal, the apparatus comprising:
- a plurality of rectifiers for rectifying the RF signals to direct current (DC) voltage;
- a power storage device for storing the DC voltages from the rectifiers as power;
- and
- an antenna array having a plurality of narrow-band antennas, each of the narrow-band antennas being coupled to one of the rectifiers, for receiving signals at channel frequencies in a communications use frequency band and signals frequencies adjacent to the communications use frequency band,
- wherein, when the portable terminal is powered off, all of the narrow-band antennas are activated, and, during communications, a narrow-band antenna corresponding to a channel frequency in use is deactivated and the other narrow-band antennas are activated.
2 more elements
A method of using ambient radio frequency (RF) power in a portable terminal, the method comprising:
- determining whether the portable terminal is in communication;
- deactivating a narrow-band antenna corresponding to a channel frequency in use and activating other narrow-band antennas during communications;
- receiving ambient RF signals through the activated narrow-band antennas;
- rectifying the RF signals to direct current (DC) voltages using a plurality of rectifiers coupled to the narrow-band antenna;
- and
- storing the DC voltages as power from the rectifiers.
3 more elements
Dependencies are inferred from the claim text.