# US 2017/0289905 A1 · Electronic device with wireless power transfer and reduced power consumption > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0289905 A1 - Document ID: US20170289905A1 - Status: Published application - Kind: A1 - Application number: 15/473,765 - Filed: 2017-03-30 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Inventors: Marcellus CHEN - Web page: https://patentgrep.com/patent/US20170289905A1 ## CPC - H04W 52/0209: {in terminal devices} - H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones - H02J 50/12: of the resonant type - H04B 1/40: Circuits - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H04B: TRANSMISSION ## Abstract An electronic device including wireless energy receiver circuitry and an energy receiver antenna that is connected to the wireless charging circuitry can be used to improve electrical efficiency. The energy receiver antenna has a tunable reception frequency that can be controlled to optimize energy reception. For example, the energy receiver antenna can be tuned to match a wireless transmission frequency being output by the electronic device itself. If the electronic device is not currently outputting any transmission signals, the energy receiver antenna can be tuned to optimize energy reception from any other available signal source. In some examples, the electronic device may dynamically tune the reception frequency of the energy receiver antenna according to the relative strength of signals being received. Energy received by the energy receiver antenna can be supplied to power various components of the electronic device. ## Claims ### Claim 1 An electronic device, comprising: wireless power receiver circuitry; a first energy receiver antenna connected to the wireless energy receiver circuitry, the first energy receiver antenna having a tunable reception frequency; and a controller configured to tune the tunable reception frequency of the first energy receiver antenna. ### Claim 2 (depends on 1) The electronic device of claim 1, further comprising: a transmitter generating a wireless transmission signal at a radio frequency (RF) transmit frequency; and a transmitter antenna for transmitting the wireless transmission signal at the RF transmit frequency. ### Claim 3 (depends on 2) The electronic device of claim 2, wherein the controller is configured to tune the tunable reception frequency of the first energy receiver antenna to the RF transmit frequency if the transmitter antenna is actively transmitting the wireless transmission signal. ### Claim 4 (depends on 3) The electronic device of claim 3, wherein the controller is configured to tune the tunable reception frequency of the first energy receiver antenna to a wireless energy signal frequency different from the RF transmit frequency if the transmitter antenna is not actively transmitting the wireless transmission signal. ### Claim 5 (depends on 2) The electronic device of claim 2, wherein the controller is configured to tune the tunable reception frequency of the first energy receiver antenna to a frequency that is between the RF transmit frequency and a wireless energy signal frequency if the transmitter antenna is actively transmitting the wireless transmission signal and the wireless energy signal is being received by the first energy receiver antenna. ### Claim 6 (depends on 1) The electronic device of claim 1, wherein the controller is configured to: perform a sweep of a receivable frequency spectrum for the first energy receiver antenna and detect any frequency in the receivable frequency spectrum at which energy is being received at a level equal to or greater than required to power the wireless energy receiver circuitry; and tune the tunable reception frequency of the first energy receiver antenna to receive energy at least one detected frequency in the receivable frequency spectrum. ### Claim 7 (depends on 1) The electronic device of claim 1, further comprising a plurality of energy receiver antennas connected to the wireless energy receiver circuitry. ### Claim 8 (depends on 1) The electronic device of claim 1, further comprising: a second energy receiver antenna connected to the wireless energy receiver circuitry and matched to the RF transmit frequency. ### Claim 9 (depends on 1) The electronic device of claim 1, further comprising: a second energy receiver antenna connected to the wireless energy receiver circuitry, wherein the second energy receiver antenna has a tunable reception frequency, and the controller is configured to tune the tunable reception frequency of the second energy receiver antenna independently from the tunable reception frequency of the first energy receiver antenna. ### Claim 10 A wireless communication device, comprising: a transmitter generating a wireless transmission signal at a radio frequency (RF) transmit frequency; a transmitter antenna connected to the transmitter for transmitting the wireless transmission signal at the RF transmit frequency; an energy receiver antenna having a tunable reception frequency; wireless energy receiver circuitry connected to the energy receiver antenna and configured to convert signals received by the energy receiver antenna into direct current power; and a controller configured to tune the tunable reception frequency of the energy receiver antenna. ### Claim 11 (depends on 10) The wireless communication device of claim 10, wherein the controller is configured to: tune the tunable reception frequency of the energy receiver antenna to the RF transmit frequency if the transmitter antenna is actively transmitting the wireless transmission signal, and tune the tunable reception frequency of the energy receiver antenna to a wireless energy signal frequency different from the RF transmit frequency if the transmitter antenna is not actively transmitting the wireless transmission signal. ### Claim 12 (depends on 11) The wireless communication device of claim 11, wherein the controller is configured to: detect respective signal strengths of a plurality of signals being received by the energy receiver antenna, and select the tunable reception frequency of the energy receiver antenna according to signal strength. ### Claim 13 (depends on 10) The wireless communication device of claim 10, wherein the controller is configured to: detect respective signal strengths of a plurality of signals being received by the energy receiver antenna, and select the tunable reception frequency of the energy receiver antenna according to signal strength. ### Claim 14 (depends on 10) The wireless communication device of claim 10, wherein the controller is configured to: perform a sweep of a receivable frequency spectrum for the energy receiver antenna and detect any frequency in the receivable frequency spectrum at which energy is being received at a level equal to or greater than required to power the wireless energy receiver circuitry, and tune the tunable reception frequency of the energy receiver antenna to receive energy at least one detected frequency in the receivable frequency spectrum. ### Claim 15 (depends on 10) The wireless communication device of claim 10, further comprising: a battery connected to the wireless energy receiver circuitry to receive direct current power from the wireless charging circuitry. ### Claim 16 (depends on 10) The wireless communication device of claim 10, further comprising: an isolating switch between the energy receiver antenna and energy receiver circuitry. ### Claim 17 A method of reducing power consumption of an electronic device including wireless energy receiver circuitry and a first energy receiver antenna connected to the wireless charging circuitry and having a tunable reception frequency, the method comprising: detecting signal strengths of a plurality of signals being received by the energy receiver antenna, selecting a frequency according to the signal strengths of the plurality of signals, and tuning the tunable reception frequency of the energy receiver antenna to the selected frequency. ### Claim 18 (depends on 17) The method of claim 17, wherein the selected frequency is a transmission frequency of a wireless communication signal being output by the electronic device. ### Claim 19 (depends on 17) The method of claim 17, wherein the frequency is selected to be between frequencies of two signals in the plurality of signals being received by the energy receiver antenna. ### Claim 20 (depends on 17) The method of claim 17, further comprising: converting energy received by the energy receiver antenna into direct current power, and doing at least one of the following: charging a battery of the electronic device with the direct current power, and operating the electronic device with the direct current power to limit discharging of the battery.