Wireless charging performance measurement
First Claim
Patent Images
1. A method of measuring wireless charging performance comprising:
- providing an oscillation signal to a power measurement apparatus, the oscillation signal comprising a wave that oscillates between a known first voltage level and a known second voltage level;
setting a receiver gain of the measurement apparatus based on measured voltage levels produced in response to receiving the oscillation signal wave at the known first and second voltage levels;
transmitting a wireless charging signal;
subsequent to setting the receiver gain, measuring a transmitted power of the wireless charging signal by measuring voltage and current of a signal provided to an antenna for transmitting the wireless charging signal, measuring a relative phase of the voltage and the current, and calculating the transmitted power based on the voltage, the current and the relative phase;
receiving an indication of a received power from the wireless charging signal received by a device; and
determining wireless charging performance based on the measured transmitted power and the indication of the received power;
wherein measuring the voltage of the signal provided to the antenna for transmitting the wireless charging signal comprises;
connecting a first input of the measurement apparatus to a ground; and
connecting a second input of the measurement apparatus to a first potential divider that is connected to a first node at an output of a power amplifier producing the signal provided to the antenna.
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Abstract
Wireless charging methods, chargers and devices are disclosed, including a method of measuring wireless charging performance comprising transmitting a wireless charging signal, measuring a transmitted power of the wireless charging signal, receiving an indication of a received power from the wireless charging signal received by a device, and determining wireless charging performance based on the transmitted power and the indication of the received power.
9 Citations
18 Claims
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1. A method of measuring wireless charging performance comprising:
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providing an oscillation signal to a power measurement apparatus, the oscillation signal comprising a wave that oscillates between a known first voltage level and a known second voltage level; setting a receiver gain of the measurement apparatus based on measured voltage levels produced in response to receiving the oscillation signal wave at the known first and second voltage levels; transmitting a wireless charging signal; subsequent to setting the receiver gain, measuring a transmitted power of the wireless charging signal by measuring voltage and current of a signal provided to an antenna for transmitting the wireless charging signal, measuring a relative phase of the voltage and the current, and calculating the transmitted power based on the voltage, the current and the relative phase; receiving an indication of a received power from the wireless charging signal received by a device; and determining wireless charging performance based on the measured transmitted power and the indication of the received power; wherein measuring the voltage of the signal provided to the antenna for transmitting the wireless charging signal comprises; connecting a first input of the measurement apparatus to a ground; and connecting a second input of the measurement apparatus to a first potential divider that is connected to a first node at an output of a power amplifier producing the signal provided to the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless charger comprising:
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an antenna; a transmitter for transmitting a wireless charging signal using the antenna; an oscillator for providing an oscillation signal, the oscillation signal comprising a wave that oscillates between a known first voltage level and a known second voltage level; measurement apparatus for measuring a transmitted power of the wireless charging signal, wherein, when performing a calibration procedure, the measurement apparatus is configured to receive the oscillation signal from the oscillator and set a receiver gain of the measurement apparatus based on measured voltage levels produced in response to receiving the oscillation signal wave at the known first and second voltage levels; a receiver for receiving an indication of a received power from the wireless charging signal; processing apparatus for determining wireless charging performance based on the measured transmitted power and the indication of the received power; a power amplifier for producing the signal provided to the antenna; and a first potential divider that is connected to a first node at an output of the power amplifier, wherein, subsequent to setting the receiver gain, the measurement apparatus is configured to measure voltage and current of a signal provided to the antenna for transmitting the wireless charging signal, measure a relative phase of the voltage and the current, and calculate the transmitted power based on the voltage, the current and the relative phase; and wherein the measurement apparatus comprises a first input and a second input and, when measuring the voltage of the signal provided to the antenna for transmitting the wireless charging signal, the measurement apparatus is configured to; connect the first input of the measurement apparatus to a ground; and connect a second input of the measurement apparatus to the first potential divider. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification