| Patent application number | Description | Published |
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| 20090284082 | METHOD AND APPARATUS WITH NEGATIVE RESISTANCE IN WIRELESS POWER TRANSFERS - Exemplary embodiments are directed to wireless power transfer. Antenna circuits use negative resistance to offset resistance from other elements in the circuit. The antenna circuits include an antenna for coupling with a near field radiation at a resonant frequency and a capacitance element connected in series with the receive antenna. The antenna circuits also include a negative resistance generator connected in series with the capacitance element. In the case of a receive antenna, and possibly a repeater antenna, a load is connected in series with the negative resistance generator. The load may draw power from the near field radiation when the antenna circuit oscillates near the resonant frequency. In the case of a transmit antenna, a signal generator is coupled in series with the antenna for applying signal power to the antenna circuit to generate an electromagnetic field at the resonant frequency creating a coupling-mode region within a near field. | 11-19-2009 |
| 20090284218 | METHOD AND APPARATUS FOR AN ENLARGED WIRELESS CHARGING AREA - Exemplary embodiments are directed to wireless power transfer including a plurality of antenna circuits spatially arranged and each including an antenna configured to resonate and generate a near field coupling mode region thereabout in response to a driving signal from a power amplifier. The apparatus further includes a processor configured to control activation of resonance of each of the plurality of antenna circuits. The method for wirelessly charging includes driving a signal from a power amplifier and controlling activation of resonance of a plurality of antenna circuits spatially arranged and each including an antenna configured to resonate in response to the driving signal. | 11-19-2009 |
| 20090284227 | RECEIVE ANTENNA FOR WIRELESS POWER TRANSFER - Exemplary embodiments are directed to wireless power transfer to an electronic circuit including a wireless charging receive antenna comprising a first loop of an energy receiving conductor and at least another loop of said energy receiving conductor electrically coupled to the first loop. The loops form a multi-turn loop antenna to resonate at a wireless charging frequency and provide wirelessly received power to the electronic device. The multi-turn loop antenna is configured for affixing to a housing of the wireless device. | 11-19-2009 |
| 20090284245 | WIRELESS POWER TRANSFER FOR APPLIANCES AND EQUIPMENTS - Exemplary embodiments are directed to wireless power transfer. A transmitting device or a receiving device for use in a wireless transfer system may be equipment or a household appliance. The transmitting device includes a transmit antenna to wirelessly transfer power to a receive antenna by generating a near field radiation within a coupling-mode region. An amplifier applies an RF signal to the transmit antenna. A presence detector detects a presence of a receiver device within the coupling-mode region. A controller adjusts a power output of the amplifier responsive to the presence of a receiver device. The presence detector may also detect a human presence. The power output may be adjusted at or below the regulatory level when the presence signal indicates human presence and above a regulatory level when the presence signal indicates human absence. | 11-19-2009 |
| 20090286470 | REPEATERS FOR ENHANCEMENT OF WIRELESS POWER TRANSFER - Exemplary embodiments are directed to wireless power transfer. A wireless power transfer system include a transmit circuit with a transmit antenna driven from a power amplifier to generate a near field radiation at a resonant frequency within a first coupling mode region surrounding the transmit antenna. One or more repeater antennas are disposed at different locations within the first coupling mode region. Each repeater antenna generates an enhanced near field radiation at the resonant frequency within a coupling mode region corresponding to that repeater antenna. One or more receive circuits including a receive antenna receive power when they are disposed in one of the coupling mode regions corresponding to that repeater antenna. | 11-19-2009 |
| 20100136912 | Antenna having a defined gap between first and second radiating elements - An apparatus including an antenna for wireless communications is disclosed. The apparatus includes a first radiating element and a second radiating element that substantially surrounds the first radiating element to define a gap therebetween. The first radiating element is electromagnetically coupled to an electrically insulated from the second radiating element. The apparatus may further include a third radiating element that is electromagnetically coupled to the first and second radiating element. The third radiating element may be electrically coupled to the second radiating element and electrically insulated from the first radiating element. The second radiating element may include at least one characteristic feature that is substantially the same as at least one characteristic feature of the third radiating element. | 06-03-2010 |
| 20100219981 | Antenna including first and second radiating elements having substantially the same characteristic features - An apparatus including an antenna for wireless communications is disclosed. The antenna includes a first radiating element and a second radiating element electromagnetically coupled to and electrically isolated from the first radiating element. The first radiating element includes at least one characteristic feature that is substantially the same as at least one characteristic feature of the second radiating element. The first radiating element may be configured as a planar monopole having various shapes, such as elliptical, circular, triangular, square, rectangular, diamond, or polygon. The planar monopole may further be electrically coupled to a flat or curved metallic load. The first radiating element may also be configured as a cone. The second radiating element may be configured as a flat or curved metal structure. | 09-02-2010 |
| 20100323616 | DEVICES FOR CONVEYING WIRELESS POWER AND METHODS OF OPERATION THEREOF - Exemplary embodiments are directed to wireless power. A method may comprise receiving wireless power with a receiver and charging an accumulator with energy from the received wireless power. The method may further include conveying energy from the accumulator to an energy storage device upon a charging level of the accumulator reaching a threshold level. | 12-23-2010 |
