# US 2014/0198011 A1 · Antenna device and wireless communication apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198011 A1 - Document ID: US20140198011A1 - Status: Published application - Kind: A1 - Application number: 14/217,901 - Filed: 2014-03-18 - Published: 2014-07-17 - Earliest claimed: 2012-05-28 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Nobuhito TSUBAKI; Noboru KATO - Web page: https://patentgrep.com/patent/US20140198011A1 ## CPC - H01Q 7/06: with core of ferromagnetic material (H01Q7/02 takes precedence) - H01Q 1/2291: {used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W)} - H01Q 1/243: {with built-in antennas} - 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 - H01Q 21/08: the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna device includes a feeding coil antenna and a booster coil antenna electromagnetically coupled to the feeding coil antenna. The feeding coil antenna includes a plurality of coil portions including at least one magnetic body and each including a coil conductor wound around the at least one magnetic body. The plurality of coil portions are connected to one another in an in-phase mode, and are arranged near one another such that winding axes of the coil conductors are oriented approximately in the same direction and at least portions of respective openings of the coil conductors face one another. ## Claims ### Claim 1 (canceled) ### Claim 2 An antenna device comprising: a feeding coil antenna; and a booster coil antenna electromagnetically coupled to the feeding coil antenna; wherein the feeding coil antenna includes a plurality of coil portions including at least one magnetic body and each including a coil conductor wound around the at least one magnetic body; the plurality of coil portions are connected to one another in an in-phase mode, and are arranged such that winding axes of the coil conductors are oriented approximately in a same direction and at least portions of respective openings of the coil conductors face one another. ### Claim 3 (depends on 2) The antenna device according to claim 2, wherein the respective coil conductors of the plurality of coil portions are connected in series or in parallel with one another. ### Claim 4 (depends on 2) The antenna device according to claim 2, wherein the at least one magnetic body included in the plurality of coil portions includes first and second magnetic bodies arranged independently for first and second coil portions of the plurality of coil portions. ### Claim 5 (depends on 4) The antenna device according to claim 4, wherein the plurality of coil portions are arranged such that the winding axes of the coil conductors coincide with each other. ### Claim 6 (depends on 4) The antenna device according to claim 4, wherein the winding axes of the plurality of coil conductors do not coincide with each other. ### Claim 7 (depends on 4) The antenna device according to claim 4, wherein the respective magnetic bodies included in the plurality of coil portions have different external sizes at portions on which the respective coil conductors are wound. ### Claim 8 (depends on 2) The antenna device according to claim 2, wherein the at least one magnetic body included in the plurality of coil portions includes a single body common to the first and second coil portions and includes a cut-out portion which partly isolates the respective openings of the first and second coil portions from each other. ### Claim 9 (depends on 2) The antenna device according to claim 2, wherein the respective coil conductors of the first and second coil portions have different numbers of turns. ### Claim 10 (depends on 2) The antenna device according to claim 2, wherein a magnetic layer is arranged between the feeding coil antenna and the booster coil antenna. ### Claim 11 (depends on 2) The antenna device according to claim 2, wherein the plurality of coil portions are arranged near a portion of a side of the booster antenna when viewed in plan in the winding axis direction of the booster coil antenna. ### Claim 12 A wireless communication apparatus comprising: a feeding circuit; a feeding coil antenna connected to the feeding circuit; and a booster coil antenna electromagnetically coupled to the feeding coil antenna; wherein the feeding coil antenna includes a plurality of coil portions including at least one magnetic body and each including a coil conductor wound around the at least one magnetic body; and the plurality of coil portions are connected to one another in an in-phase mode, and are arranged such that winding axes of the coil conductors are oriented approximately in a same direction and at least portions of respective openings of the coil conductors face one another. ### Claim 13 (depends on 12) The wireless communication apparatus according to claim 12, wherein the respective coil conductors of the plurality of coil portions are connected in series or in parallel with one another. ### Claim 14 (depends on 12) The wireless communication apparatus according to claim 12, wherein the at least one magnetic body included in the plurality of coil portions includes first and second magnetic bodies arranged independently for first and second coil portions of the plurality of coil portions. ### Claim 15 (depends on 14) The wireless communication apparatus according to claim 14, wherein the plurality of coil portions are arranged such that the winding axes of the coil conductors coincide with each other. ### Claim 16 (depends on 14) The wireless communication apparatus according to claim 14, wherein the winding axes of the plurality of coil conductors do not coincide with each other. ### Claim 17 (depends on 14) The wireless communication apparatus according to claim 14, wherein the respective magnetic bodies included in the plurality of coil portions have different external sizes at portions on which the respective coil conductors are wound. ### Claim 18 (depends on 12) The wireless communication apparatus according to claim 12, wherein the at least one magnetic body included in the plurality of coil portions includes a single body common to the first and second coil portions and includes a cut-out portion which partly isolates the respective openings of the first and second coil portions from each other. ### Claim 19 (depends on 12) The wireless communication apparatus according to claim 12, wherein the respective coil conductors of the first and second coil portions have different numbers of turns. ### Claim 20 (depends on 12) The wireless communication apparatus according to claim 12, wherein a magnetic layer is arranged between the feeding coil antenna and the booster coil antenna.