# US 10,770,924 B2 · Reradiation antenna and wireless charging device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,924 B2 - Document ID: US10770924B2 - Status: Granted - Kind: B2 - Application number: 15/560,914 - Filed: 2016-02-02 - Published: 2018-03-22 - Granted: 2020-09-08 - Earliest claimed: 2015-03-25 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Joosung Hwang; Jeongkyo Seo; Sangju Lee - Web page: https://patentgrep.com/patent/US10770924B2 ## CPC - H02J 7/70: characterised by the mechanical construction - H01Q 1/24: with receiving set - H01Q 1/38: formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142)} - H01Q 1/48: Earthing means; Earth screens; Counterpoises - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - H02J 50/005: {Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices} - H02J 50/10: using inductive coupling - H02J 50/12: of the resonant type - H02J 50/20: using microwaves or radio frequency waves - H04B 7/14: Relay systems - H01F 38/14: Inductive couplings - H01Q 1/243: {with built-in antennas} - H01Q 5/371: Branching current paths - H01Q 9/30: with feed to end of elongated active element, e.g. unipole (H01Q9/44 takes precedence) - H02J 50/23: characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas - H02J 50/27: characterised by the type of receiving antennas, e.g. rectennas - H04B 7/15: Active relay systems - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A reradiation antenna comprises, an insulation plate; a loop-shaped radiation unit formed on one surface of the insulation plate, disposed along an outer circumference of the insulation plate, and having one end and the other end disposed to be adjacent to each other; a ground connected to the end of the radiation unit; and a power supply unit connected to the other end of the radiation unit so as to supply power, and can receive a wireless signal and transmit the wireless signal to a terminal without degrading the performance of a wireless charging device. ## Claims ### Claim 1 A reradiation antenna coupling with an antenna of a mobile terminal, the reradiation antenna comprising: an insulating board; a loop-shaped radiation unit formed along a circumference of the insulating board in one surface of the insulating board, with one end and the other end which are arranged adjacent to each other; a ground connected with the end of the radiation unit; and a power supply unit connected with the other end of the radiation unit and configured to supply an electric power, wherein upper and lower portions of the loop-shaped radiation unit are thicker than other portions of the loop-shaped radiation unit. ### Claim 2 (depends on 1) The reradiation antenna of claim 1, wherein the insulating board is rectangular-shaped, and the end and the other end of the radiation unit are arranged adjacent to one corner of a lower end of the insulating board. ### Claim 3 (depends on 2) The reradiation antenna of claim 2, further comprising: an auxiliary radiation unit extended from a portion near the end of the radiation unit in a horizontal direction with respect to the insulating board. ### Claim 4 (depends on 3) The reradiation antenna of claim 3, wherein the auxiliary radiation unit is located in the loop of the radiation unit. ### Claim 5 (depends on 3) The reradiation antenna of claim 3, wherein a portion of the radiation unit arranged in a horizontal direction of the insulating board has a larger width than a portion of the insulating board in a vertical direction. ### Claim 6 (depends on 1) The reradiation antenna of claim 1, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 7 (depends on 6) The reradiation antenna of claim 6, wherein the plurality of the projections are arranged at equidistant intervals. ### Claim 8 (depends on 1) The reradiation antenna of claim 1, further comprising: an electromagnetic field shut-off pattern located in a central portion of the other surface of the insulating board and comprising a plurality of conductive tapes which are extended horizontally and arranged vertically, in parallel. ### Claim 9 (depends on 1) The reradiation antenna of claim 1, wherein the radiation unit comprises at least one of Polysilicon, Ceramic, Carbon fiber, Conductive ink, Conductive paste, ITO (Indium Tin Oxide), CNT (Carbon Nano Tube) and conductive polymer. ### Claim 10 A wireless charging device comprising: a housing; a power transmission coil located in the housing and configured to transmit power to an external mobile terminal; a reradiation antenna located on the wireless transmission coil and configured to receive and re-radiate an antenna signal for the external mobile terminal; and a power supply unit configured to supply power to the power transmission coil and the reradiation antenna, wherein the reradiation antenna comprises: an insulating board; a loop-shaped radiation unit formed along a circumference of the insulating board in a predetermined portion of one surface of the insulating board, where the loop-shaped radiation unit is not overlapped with the power transmission coil; a ground connected with the end of the radiation unit; and a power supply unit connected with the other end of the radiation. ### Claim 11 (depends on 10) The wireless charging device of claim 10, wherein the insulating board is rectangular-shaped, and the end and the other end of the radiation unit are arranged adjacent to one corner of a lower end of the insulating board. ### Claim 12 (depends on 10) The wireless charging device of claim 10, further comprising: an auxiliary radiation unit extended from a portion near the end of the radiation unit in a horizontal direction with respect to the insulating board. ### Claim 13 (depends on 10) The wireless charging device of claim 10, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 14 (depends on 10) The wireless charging device of claim 10, further comprising: an electromagnetic field shut-off pattern located in a central portion of the other surface of the insulating board and comprising a plurality of conductive tapes which are extended horizontally and arranged vertically, in parallel. ### Claim 15 (depends on 2) The reradiation antenna of claim 2, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 16 (depends on 3) The reradiation antenna of claim 3, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 17 (depends on 11) The wireless charging device of claim 11, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 18 (depends on 12) The wireless charging device of claim 12, wherein the radiation unit comprises a plurality of projections projected toward an inner portion of the loop. ### Claim 19 A reradiation antenna comprising: an insulating board; a loop-shaped radiation unit formed in one surface of the insulating board, with one end and the other end which are arranged adjacent to each other; a ground connected with the end of the radiation unit; and an electromagnetic field shut-off pattern located in a central portion of another surface of the insulating board. ### Claim 20 (depends on 19) The reradiation antenna of claim 19, wherein the electromagnetic field shut-off pattern comprises a plurality of conductive tapes which are extended horizontally and arranged vertically, in parallel.