# US 7,466,274 B2 · Multi-band antenna > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,466,274 B2 - Document ID: US7466274B2 - Status: Granted - Kind: B2 - Application number: 11/613,248 - Filed: 2006-12-20 - Published: 2008-06-26 - Granted: 2008-12-16 - Earliest claimed: 2006-12-20 - Assignees: Cheng Uei Precision Industry Co., Ltd. - Inventors: Ching-Chi Lin; Kai Shih; Yu-Yuan Wu - Web page: https://patentgrep.com/patent/US7466274B2 ## CPC - H01Q 1/2266: {disposed inside the computer} - G06F 1/1616: {with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position} - G06F 1/1698: {the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone (details of antennas disposed inside a computer H01Q1/2266)} - H01Q 1/243: {with built-in antennas} - H01Q 5/335: at the feed, e.g. for impedance matching - H01Q 5/371: Branching current paths - H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A multi-band antenna adapted to a portable electrical device capable of operating in various wireless communication bands includes a first radiating conductor having opposite elongated sides, a second radiating conductor extending from one end of the first radiating conductor, a third radiating conductor arranging about a central area of the first radiating. Both the second radiating conductor and the third radiating conductor extend from the same elongated side of the first radiating conductor. A feeding body is curved and extended from the third radiating conductor. According to a position that the feeding body connecting to the third radiating conductor and designed the feeding body, operation of the multi-band antenna has a preferred range of a low frequency bandwidth and a high frequency harmonic bandwidth. ## Claims ### Claim 1 A multi-band antenna comprising: a first radiating conductor having elongated edges; a second radiating conductor extending from one end of said first radiating conductor, a length of said first radiating conductor longer than a length of said second radiating conductor; a third radiating conductor extending from the same elongated edge of said first radiating conductor where said second radiating conductor extending from, a width of said third radiating conductor larger than said width of said first radiating conductor, said length of said first radiating conductor longer than a length of said third radiating conductor; and a feeding body arranging at the vicinity of a corner of said third radiating conductor closing said second radiating conductor, wherein said feeding body has a first U-shape portion and a second U-shape portion, both said first and second U-shape portion share a common side arm, the opening of said first U-shape faces to said second radiating conductor and one end of said first U-shape portion connects to said third radiating conductor, the opening of said second U-shape portion faces opposite to said second radiating conductor, a feeding portion extends from one end of the second U-shape portion. ### Claim 2 (depends on 1) The multi-band antenna as claimed in claim 1, wherein said second radiating conductor is perpendicular to the first radiating conductor. ### Claim 3 (depends on 1) The multi-band antenna as claimed in claim 1, wherein said third radiating conductor perpendicular to the first radiating conductor is a rectangle. ### Claim 4 (depends on 1) The multi-band antenna as claimed in claim 1, further comprising a first capacitor arranged at said common side arm and connected said first U-shape portion and said second U-shape portion. ### Claim 5 (depends on 1) The multi-band antenna as claimed in claim 1, further comprising a grounding portion arranged about said feeding portion of said feeding body. ### Claim 6 (depends on 5) The multi-band antenna as claimed in claim 5, further comprising a matching circuit connecting said feeding portion of said feeding body and said grounding portion, which has a second capacitor and an inductance parallel connecting said second capacitor. ### Claim 7 (depends on 6) The multi-band antenna as claimed in claim 6, wherein said first radiating conductor, said second radiating conductor and said third radiating conductor are arranged at a top of a display of a laptop, a free end portion of said second radiating conductor, said feeding body, said grounding portion and said matching circuit are arranged at a back surface of said display of said laptop, said laptop operates said multi-band antenna through a cable connecting said feeding portion and said grounding portion. ### Claim 8 A multi-band antenna which has a low frequency bandwidth and an up frequency bandwidth two to three times frequency upper than said low frequency bandwidth comprising: an elongated radiating conductor made substantially of metallic substances having a first end and a second end; a rectangle radiating conductor extending from an elongated edge of said elongated radiating conductor near said first end of said elongated radiating conductor; and a feeding body having a feeding portion extending from said rectangle radiating conductor, a length from said feeding body connecting said rectangle radiating conductor to said first end of said elongated radiating conductor substantially a quarter wavelength of said high frequency bandwidth, a length from said feeding body connecting said rectangle radiating conductor to said second end of said elongated radiating conductor substantially a quarter wavelength of said low frequency bandwidth. ### Claim 9 (depends on 8) The multi-band antenna as claimed in claim 8, wherein said feeding body extends from the vicinity of a corner of said rectangle radiating conductor near said first end of said elongated radiating conductor. ### Claim 10 (depends on 8) The multi-band antenna as claimed in claim 8, wherein said feeding body is curved to have a first opening and a second opening reverse to said first opening, one end of said feeding body connects said rectangle radiating conductor, said feeding portion extends from other end of said feeding body. ### Claim 11 (depends on 10) The multi-band antenna as claimed in claim 10, wherein said first opening near said rectangle radiating conductor faces to said second end of said elongated radiating conductor said end of said feeding body connecting said rectangle is near said first opening. ### Claim 12 (depends on 10) The multi-band antenna as claimed in claim 10, wherein said first opening and said second opening share a common side arm of said feeding body, a first capacitor is arranged at said common side arm ### Claim 13 (depends on 8) The multi-band antenna as claimed in claim 8, further comprising a grounding portion arranged about said feeding portion of said feeding body. ### Claim 14 (depends on 13) The multi-band antenna as claimed in claim 13, further comprising a matching circuit connecting said feeding portion of said feeding body and said grounding portion, which has a second capacitor and a inductance parallel connecting the second capacitor. ### Claim 15 (depends on 14) The multi-band antenna as claimed in claim 14, wherein said multi-band antenna is folded to configure in a portable electrical device, said elongated radiating conductor and said rectangle radiating conductor are located on same plane different to said feeding body, said grounding portion is a ground of said portable electrical device. ### Claim 16 (depends on 8) The multi-band antenna as claimed in claim 8, wherein said elongated radiating conductor has a first portion having said first end and a second portion having said second end perpendicular said first portion. ### Claim 17 A multi-band antenna comprising: a first radiating conductor having elongated edges; a second radiating conductor extending from and perpendicular to one end of said first radiating conductor, a length of said first radiating conductor longer than a length of said second radiating conductor; a third radiating conductor extending from the same elongated edge of said first radiating conductor where said second radiating conductor extending from, a width of said third radiating conductor larger than said width of said first radiating conductor, said length of said first radiating conductor longer than a length of said third radiating conductor; a feeding body arranged at the vicinity of a corner of said third radiating conductor closing said second radiating conductor, said feeding body having a first U-shape portion and a second U-shape portion, both said first and second U-shape portion sharing a common side arm, the opening of said first U-shape facing to said second radiating conductor and one end of said first U-shape portion connecting said third radiating conductor, the opening of said second U-shape portion facing opposite to said second radiating conductor, a feeding portion extends from one end of the second U-shape portion; a first capacitor arranged at said common side arm and connected said first U-shape portion and said second U-shape portion; and a grounding portion arranged about said feeding portion of said feeding body. ### Claim 18 (depends on 17) The multi-band antenna as claimed in claim 17, further comprising a matching circuit connecting said feeding portion of said feeding body and said grounding portion, which has a second capacitor and an inductance parallel connecting said second capacitor. ### Claim 19 (depends on 17) The multi-band antenna as claimed in claim 17, wherein said multi-band antenna is folded to configure in a portable electrical device, said first radiating conductor, second radiating conductor and said third radiating conductor are located on same plane different to a free end portion of said second radiating conductor and said feeding body, said grounding portion electronically contacts a ground of said portable electrical device.