Frequency variable power transmitter and receiver in Fresnel region and power transmitting system
First Claim
1. A frequency variable power transmitter in Fresnel region used in a frequency variable power transmitting system in Fresnel region having a capacitive element and an inductive element formed in an antenna for transmitting power by electromagnetic wave between a transmitter and a receiver in order to use static field and induction field at the same time in power transmission, setting a transmitting frequency of the transmitter to be variable, and modulating the electromagnetic wave transmitted from the transmitter and reflected by the receiver to control power transmission efficiency between the transmitter and the receiver by using the modulated reflection wave,the frequency variable power transmitter in Fresnel region comprising:
- the antenna;
a frequency variable carrier generator;
a directional coupler;
a demodulator; and
a control circuit, whereinthe reflection wave received by the antenna is divided by the directional coupler, and then, the reflection wave is demodulated by the demodulator, and the frequency of the frequency variable carrier generator can be varied by using the demodulated signal.
1 Assignment
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Accused Products
Abstract
An object is to achieve a radio power transmitting system capable of adaptively controlling power transmission efficiency, and the following means for achieving it is proposed. The power transmitting system includes a receiver having a loaded antenna and a transmitter whose transmitting frequency is variable, and it controls power transmission efficiency by using a modulated electromagnetic wave reflected from the receiver. A capacitive element and an inductive element are formed in the antenna, the transmitting frequency of the transmitter is set to be variable, the electromagnetic wave transmitted from the transmitter and reflected by the receiver is modulated, and the power transmission efficiency between the transmitter and the receiver is controlled by using the modulated reflection wave.
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Citations
17 Claims
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1. A frequency variable power transmitter in Fresnel region used in a frequency variable power transmitting system in Fresnel region having a capacitive element and an inductive element formed in an antenna for transmitting power by electromagnetic wave between a transmitter and a receiver in order to use static field and induction field at the same time in power transmission, setting a transmitting frequency of the transmitter to be variable, and modulating the electromagnetic wave transmitted from the transmitter and reflected by the receiver to control power transmission efficiency between the transmitter and the receiver by using the modulated reflection wave,
the frequency variable power transmitter in Fresnel region comprising: - the antenna;
a frequency variable carrier generator;
a directional coupler;
a demodulator; and
a control circuit, whereinthe reflection wave received by the antenna is divided by the directional coupler, and then, the reflection wave is demodulated by the demodulator, and the frequency of the frequency variable carrier generator can be varied by using the demodulated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the antenna;
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9. A frequency variable power receiver in Fresnel region used in a frequency variable power transmitting system in Fresnel region having a capacitive element and an inductive element in an antenna for transmitting power by electromagnetic wave between a transmitter and a receiver in order to use static field and induction field at the same time in power transmission, setting a transmitting frequency of the transmitter to be variable, and modulating the electromagnetic wave transmitted from the transmitter and reflected by the receiver to control power transmission efficiency between the transmitter and the receiver by using the modulated reflection wave,
the frequency variable power receiver in Fresnel region comprising: - the antenna;
a switching element inserted in parallel to the antenna;
a control circuit;
a memory; and
a rectifying circuit, whereinthe control circuit turns on/off the switching element at a constant timing previously memorized in the memory. - View Dependent Claims (10, 11, 12, 13, 14)
- the antenna;
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15. A frequency variable power transmitting system in Fresnel region, wherein
a capacitive element and an inductive element are formed in an antenna for transmitting power by electromagnetic wave between a transmitter and a receiver in order to use static field and induction field at the same time in power transmission, a transmitting frequency of the transmitter is set to be variable, and the electromagnetic wave transmitted from the transmitter and reflected by the receiver is modulated and power transmission efficiency between the transmitter and the receiver is controlled by using the modulated reflection wave.
Specification