Wireless power transmission for portable wireless power charging

Abstract

Described herein are embodiments of a portable wireless power charger that includes a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region, and a cable for feeding input power to the high-Q source magnetic resonator.

1 . A portable wireless power charger, comprising:
 a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region; and   a cable for feeding input power to the high-Q source magnetic resonator.   
     
     
         2 . The portable wireless power charger of  claim 1 , wherein the high-Q source magnetic resonator is configured to generate the magnetic near-field for coupling to a wireless power receiver. 
     
     
         3 . The portable wireless power charger of  claim 2 , further comprising transmit circuitry configured to drive the high-Q source magnetic resonator and separated from the charging region by the cable, the cable configured to couple a resonant frequency signal between the transmit circuitry and the a high-Q source magnetic resonator. 
     
     
         4 . The portable wireless power charger of  claim 1 , wherein the high-Q source magnetic resonator comprises at least one capacitively loaded conducting loop. 
     
     
         5 . The portable wireless power charger of  claim 4 , further comprising a high-Q source magnetic resonator, configured to generate a magnetic near-field between the high-Q source magnetic resonator and at least one other capacitively loaded conducting loop for transmission of wireless power from the high-Q source magnetic resonator to the at least one other capacitively loaded conducting loop. 
     
     
         6 . The portable wireless power charger of  claim 5 , wherein the high-Q source magnetic resonator is located to cause the at least one other capacitively loaded conducting loop to resonate in response to a near-field generated around the high-Q source magnetic resonator. 
     
     
         7 . The portable wireless power charger of  claim 5 , further comprising circuitry configured to drive the high-Q source magnetic resonator and separated from the charging region by a cable. 
     
     
         8 . The portable wireless power charger of  claim 1 , wherein the high-Q source magnetic resonator is configured to resonate at one of a substantially unmodulated radio frequency (RF). 
     
     
         9 . The portable wireless power charger of  claim 8 , wherein the substantially unmodulated RF frequency comprises one of a first frequency band between 119 kHz to 135 kHz, a second frequency band between 6.765 MHz to 6.795 MHz, and a third frequency band between 13.553 MHz to 13.567 MHz. 
     
     
         10 . The portable wireless power charger of  claim 8 , wherein the substantially unmodulated RF frequency is within one of the frequency bands specially assigned for industrial, scientific and medical (ISM) equipment. 
     
     
         11 . The portable wireless power charger of  claim 1 , wherein the input power is separated from the charging region by the cable. 
     
     
         12 . The portable wireless power charger of  claim 1 , wherein the charging region comprises a wireless powered computer mouse. 
     
     
         13 . The portable wireless power charger of  claim 1 , wherein the charging region comprises a wireless powered/rechargeable item. 
     
     
         14 . A wireless power transmission system, comprising:
 a portable wireless power charger comprising:
 a charging region including a high-Q source magnetic resonator configured to generate a magnetic near-field, the high-Q source magnetic resonator substantially disposed around a perimeter of the charging region; and 
 a cable for feeding input power to the high-Q source magnetic resonator; and 
   a wireless powered device comprising a receiver including a high-Q receiver magnetic resonator, the high-Q receiver magnetic resonator formed substantially about a physical interface of the wireless powered device with the charging region.   
     
     
         15 . A method for transmitting wireless power, comprising:
 coupling a resonant frequency signal over a cable; and   generating a magnetic near-field about a charging region including a high-Q source magnetic resonator for coupling of wireless power to a wireless powered device comprising a high-Q receiver magnetic resonator in response to the resonant frequency signal received over the cable.   
     
     
         16 . The method for transmitting wireless power of  claim 15 , wherein generating a magnetic near-field comprises generating a magnetic near-field from a high-Q source magnetic resonator responsive to the resonant frequency signal. 
     
     
         17 . The method for transmitting wireless power of  claim 15 , wherein generating a magnetic near-field comprises generating a magnetic near-field from a capacitively loaded conducting loop separately excited by a high-Q source magnetic resonator responsive to the resonant frequency signal. 
     
     
         18 . A portable wireless power charger, comprising:
 means for coupling a resonant frequency signal over a cable; and   means for generating a magnetic near-field about a charging region including a high-Q source magnetic resonator for coupling of wireless power to a wireless powered device including a high-Q receiver magnetic resonator in response to the resonant frequency signal received over the cable.   
     
     
         19 . The portable wireless power charger of  claim 18 , wherein the means for generating a magnetic near-field comprises means for generating a magnetic near-field from a high-Q source magnetic resonator responsive to the resonant frequency signal. 
     
     
         20 . The portable wireless power charger of  claim 18 , wherein the means for generating a magnetic near-field comprises means for generating a magnetic near-field from a capacitively loaded conducting loop separately excited by a high-Q source magnetic resonator responsive to the resonant frequency signal.