# US 9,882,398 B2 · Techniques for reducing human exposure to wireless energy in wireless power delivery environments > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,398 B2 - Document ID: US9882398B2 - Status: Granted - Kind: B2 - Application number: 14/988,010 - Filed: 2016-01-05 - Published: 2016-07-07 - Granted: 2018-01-30 - Earliest claimed: 2015-01-05 - Assignees: Ossia Inc. - Applicants: Ossia Inc. - Inventors: Hatem Ibrahim Zeine; Siamak Ebadi; Alireza Pourghorban Saghati; Anas Alfarra; Douglas Williams - Web page: https://patentgrep.com/patent/US9882398B2 ## CPC - H01Q 23/00: Antennas with active circuits or circuit elements integrated within them or attached to them - H02J 50/10: using inductive coupling - H02J 50/60: responsive to the presence of foreign objects, e.g. detection of living beings - H02J 50/70: involving the reduction of electric, magnetic or electromagnetic leakage fields - H02J 50/90: involving detection or optimisation of position, e.g. alignment - A61N 1/37229: {Shape or location of the implanted or external antenna} - Y10S 439/909: Medical use or attached to human body - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract Embodiments of the present disclosure describe techniques for reducing human exposure to wireless energy in wireless power delivery environments. In some embodiments, a wireless power reception apparatus configured to receive wireless power from a wireless charging system in a wireless power delivery environment is disclosed. The wireless power reception apparatus includes a control system and an antenna array. In some embodiments, the control system is configured to dynamically adjust transmission and reception radiation patterns of the antenna array to reduce human exposure to wireless radio frequency (RF) energy. ## Claims ### Claim 1 A wireless power reception apparatus comprising: multiple antennas; and a control system configured to dynamically adjust a cumulative radiation pattern of the multiple antennas to reduce radio frequency (RF) exposure to a user of an electronic device in which the wireless power reception apparatus is embedded, wherein the wireless power reception apparatus is configured to receive wireless power from a wireless power delivery system in a wireless power delivery environment and to provide the power to the electronic device. ### Claim 2 (depends on 1) The wireless power reception apparatus of claim 1, wherein to dynamically adjust the cumulative radiation pattern of the multiple antennas, the control system controls a direction and intensity of a beacon signal transmitted by one or more of the multiple antennas. ### Claim 3 (depends on 1) The wireless power reception apparatus of claim 1, wherein to dynamically adjust the cumulative radiation pattern of the multiple antennas, the control system controls an angle of incidence of the wireless power received from the wireless power delivery system. ### Claim 4 (depends on 1) The wireless power apparatus of claim 1, wherein the multiple antennas each have corresponding radiation patterns that are controlled over amplitude and phase by the control system. ### Claim 5 (depends on 4) The wireless power apparatus of claim 4, wherein the radiation patterns of the multiple antennas collectively comprise the cumulative radiation pattern. ### Claim 6 (depends on 5) The wireless power apparatus of claim 5, wherein the control system is further configured to detect an orientation of the multiple antennas relative to the user of the electronic device. ### Claim 7 (depends on 6) The wireless power apparatus of claim 6, wherein the control system is configured to dynamically adjust the cumulative radiation pattern of the multiple antennas based on the orientation of the multiple antennas relative to the user of the electronic device. ### Claim 8 (depends on 5) The wireless power apparatus of claim 5, wherein the control system is further configured to detect a full or partial blockage of one or more of the multiple antennas. ### Claim 9 (depends on 8) The wireless power apparatus of claim 8, wherein the control system is configured to dynamically adjust the cumulative radiation pattern of the multiple antennas based on the full or partial blockage of the one or more of the multiple antennas. ### Claim 10 (depends on 1) The wireless power apparatus of claim 1, wherein the control system is preconfigured with a set of fixed cumulative radiation patterns, and wherein the control system is configured to cycle through the set of fixed cumulative radiation patterns to identify an optimal antenna configuration for reducing RF exposure to the user of an electronic device. ### Claim 11 (depends on 1) The wireless power apparatus of claim 1, wherein the control system is configured to dynamically adjust the cumulative radiation pattern in a direction away from the user of the electronic device. ### Claim 12 (depends on 1) The wireless power apparatus of claim 1, wherein the multiple antennas are configured to have the same resonance frequency. ### Claim 13 An electronic device comprising: electronic components including one or more processors; multiple antennas disposed on or within the electronic device; and a computer-readable storage medium having instructions stored thereon which, when executed by the one or more processors, direct the electronic device to: dynamically adjust a cumulative radiation pattern of the multiple antennas to reduce radio frequency (RF) exposure to a user of an electronic device in which the wireless power reception apparatus is embedded, wherein the multiple antennas each have a corresponding radiation pattern that is controlled over amplitude and phase, the radiation patterns collectively comprising the cumulative radiation pattern, and wherein the wireless power reception apparatus is configured to receive wireless power from a wireless power delivery system in a wireless power delivery environment and to provide the power to the electronic device. ### Claim 14 (depends on 13) The electronic device of claim 13, wherein to dynamically adjust the cumulative radiation pattern of the multiple antennas, the instructions, when executed by the one or more processors, direct the electronic device to control a direction and intensity of a beacon signal transmitted by the multiple antennas or an angle of incidence of the wireless power received from the wireless power delivery system. ### Claim 15 (depends on 13) The electronic device of claim 13, wherein the instructions, when executed by the one or more processors, further direct the electronic device to: detect an orientation of the multiple antennas relative to the user of the electronic device, wherein the cumulative radiation pattern is dynamically adjusted based on the orientation of the multiple antennas relative to the user of the electronic device. ### Claim 16 (depends on 13) The electronic device of claim 13, wherein the instructions, when executed by the one or more processors, further direct the electronic device to: detect a full or partial blockage of one or more of the multiple antennas by the user of the electronic device, wherein the cumulative radiation pattern is dynamically adjusted based on the full or partial blockage. ### Claim 17 (depends on 13) The electronic device of claim 13, wherein the instructions, when executed by the one or more processors, further direct the electronic device to: cycle through a set of fixed cumulative radiation patterns to identify an optimal antenna configuration for reducing RF exposure to the user of an electronic device, wherein the control system is preconfigured with the set of fixed cumulative radiation patterns. ### Claim 18 (depends on 13) The electronic device of claim 13, wherein to dynamically adjust the cumulative ration pattern, the instructions, when executed by the one or more processors, direct the electronic device to adjust the cumulative radiation pattern in a direction away from the user of the electronic device. ### Claim 19 A method of operating a wireless power reception apparatus to reduce radio frequency (RF) exposure to a user of an electronic device in which the wireless power reception apparatus is embedded, the method comprising: detecting an orientation of an antenna array of the wireless power reception apparatus relative to a user of the electronic device; and adjusting a cumulative radiation pattern of the antenna array to reduce the RF exposure to the user of an electronic device, wherein each antenna of the antenna array has a corresponding radiation pattern that is controlled over amplitude and phase, the radiation patterns collectively comprising the cumulative radiation pattern, and wherein the wireless power reception apparatus is configured to receive wireless power from a wireless power delivery system in a wireless power delivery environment and to provide the power to the electronic device. ### Claim 20 (depends on 19) The method of claim 19, wherein detecting the orientation of the antenna array of the wireless power reception apparatus relative to the user of the electronic device comprises identifying a full or partial blockage of one or more antennas of the antenna array by the user of the electronic device.