# US 2014/0191908 A1 · Broadband antenna and wireless communication device employing same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191908 A1 - Document ID: US20140191908A1 - Status: Published application - Kind: A1 - Application number: 14/065,595 - Filed: 2013-10-29 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Chiun Mai Communication Systems, Inc. - Applicants: Chiun Mai Communication Systems, Inc. - Inventors: YEN-HUI LIN - Web page: https://patentgrep.com/patent/US20140191908A1 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 5/371: Branching current paths - H01Q 13/16: Folded slot antennas - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A broadband antenna is mounted in a metal piece and includes a radiating portion, a ground portion, and a feed portion. The radiating portion includes a main portion and a plurality of radiating arms extending from the main portion in multiple directions, the radiating arms extend to contact the metal piece. The main portion, the radiating arms, and the metal piece enclose several slots. The ground portion is connected to a plurality of end portions of the radiating arms. The feed portion is connected to the metal piece and is adjacent to the radiating portion. The feed portion, the ground portion, the main portion, and the plurality of radiating arms form different current paths, thus to form different resonance nodes, thereby tender the broadband antenna to work at multi frequency bands. A wireless communication device employing the broadband antenna is also described. ## Claims ### Claim 1 A broadband antenna mounted in a metal piece, the broadband antenna comprising: a radiating portion including a main portion and a plurality of radiating arms extending from the main portion in multiple directions, the radiating arms extending to contact sidewalls of the metal piece, the main portion, the radiating arms, and the metal piece enclosing several slots; a ground portion connected to a plurality of end portions of the radiating arms; and a feed portion connected to the metal piece and adjacent to the radiating portion; wherein the feed portion, the ground portion, the main portion, and the plurality of radiating arms form different current paths, thus to form different resonance nodes, thereby tender the broadband antenna to work at multi frequency bands. ### Claim 2 (depends on 1) The broadband antenna as claimed in claim 1, wherein the radiating portion is coplanar with the ground portion, the feed portion is in another plane. ### Claim 3 (depends on 1) The broadband antenna as claimed in claim 1, wherein the metal piece defines a hole, the hole includes a first sidewall, a second sidewall opposite to the first sidewall, and a third sidewall connecting the first sidewall and the second sidewall, the broadband antenna is mounted in the hole. ### Claim 4 (depends on 3) The broadband antenna as claimed in claim 3, wherein the radiating portion includes a connecting arm and a first radiating arm perpendicularly extended from two vertical angles of the main portion in opposite directions, the first radiating arm extends to contact the second sidewall. ### Claim 5 (depends on 4) The broadband antenna as claimed in claim 4, wherein the radiating portion further includes a second radiating arm perpendicularly extended from an end of the connecting arm away from the main portion, the second radiating arm is parallel to the main portion. ### Claim 6 (depends on 5) The broadband antenna as claimed in claim 5, wherein the radiating portion further includes a third radiating arm and a fourth radiating arm perpendicularly extended from opposite ends of the second radiating arm in opposite directions, the third radiating arm extends to contact the first sidewall, the fourth radiating arm extends to contact the second sidewall and is parallel to the first radiating arm. ### Claim 7 (depends on 6) The broadband antenna as claimed in claim 6, wherein the second radiating arm, the third radiating arm, and the first sidewall enclose a first slot; the first radiating arm, the main portion, the connecting arm, the second radiating arm, the fourth radiating arm, and the second sidewall enclose a second slot; the first radiating arm, the main portion, the connecting arm, the third radiating arm, the first sidewall, the third sidewall, and the second sidewall enclose a third slot. ### Claim 8 (depends on 6) The broadband antenna as claimed in claim 6, wherein the ground portion includes a first ground point, a second ground point, and a third ground point, the first ground point, the second ground point, and the third ground point are arranged on ends of the first radiating arm, the third radiating arm, and the fourth radiating arm adjacent to the metal piece, respectively. ### Claim 9 (depends on 6) The broadband antenna as claimed in claim 6, wherein the feed portion is parallel to the fourth radiating arm and is electrically connected to the first sidewall. ### Claim 10 A wireless communication device, comprising: a metal piece; a circuit board mounted in the metal piece; and a broadband antenna mounded on the circuit board, the broadband antenna comprising: a radiating portion including a main portion and a plurality of radiating arms extending from the main portion in multiple directions, the radiating arms extending to contact sidewalls of the metal piece, the main portion, the radiating arms, and the metal piece enclosing several slots; a ground portion connected to a plurality of end portions of the radiating arms; and a feed portion connected to the metal piece and adjacent to the radiating portion; wherein the feed portion, the ground portion, the main portion, and the plurality of radiating arms form different current paths, thus to form different resonance nodes, thereby tender the broadband antenna to work at multi frequency bands. ### Claim 11 (depends on 10) The wireless communication device as claimed in claim 10, wherein the circuit board includes a first surface and a second surface opposite to the first surface, the radiating portion and the ground portion are mounted on the first surface, the feed portion is mounted on the second surface. ### Claim 12 (depends on 10) The wireless communication device as claimed in claim 10, wherein the metal piece defines a hole, the hole includes a first sidewall, a second sidewall opposite to the first sidewall, and a third sidewall connecting the first sidewall and the second sidewall, the broadband antenna is mounted in the hole. ### Claim 13 (depends on 12) The wireless communication device as claimed in claim 12, wherein the radiating portion includes a connecting arm and a first radiating arm perpendicularly extended from two vertical angles of the main portion in opposite directions, the first radiating arm extends to contact the second sidewall. ### Claim 14 (depends on 13) The wireless communication device as claimed in claim 13, wherein the radiating portion further includes a second radiating arm perpendicularly extended from an end of the connecting arm away from the main portion, the second radiating arm is parallel to the main portion. ### Claim 15 (depends on 14) The wireless communication device as claimed in claim 14, wherein the radiating portion further includes a third radiating arm and a fourth radiating arm perpendicularly extended from opposite ends of the second radiating arm in opposite directions, the third radiating arm extends to contact the first sidewall, the fourth radiating arm extends to contact the second sidewall and is parallel to the first radiating arm. ### Claim 16 (depends on 15) The wireless communication device as claimed in claim 15, wherein the second radiating arm, the third radiating arm, and the first sidewall enclose a first slot; the first radiating arm, the main portion, the connecting arm, the second radiating arm, the fourth radiating arm, and the second sidewall enclose a second slot; the first radiating arm, the main portion, the connecting arm, the third radiating arm, the first sidewall, the third sidewall, and the second sidewall enclose a third slot. ### Claim 17 (depends on 15) The wireless communication device as claimed in claim 15, wherein the ground portion includes a first ground point, a second ground point, and a third ground point, the first ground point, the second ground point, and the third ground point are arranged on ends of the first radiating arm, the third radiating arm, and the fourth radiating arm adjacent to the metal piece, respectively. ### Claim 18 (depends on 15) The wireless communication device as claimed in claim 15, wherein the feed portion is parallel to the fourth radiating arm and is electrically connected to the first sidewall.