# US 2018/0323495 A1 · Mobile device and antenna structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323495 A1 - Document ID: US20180323495A1 - Status: Published application - Kind: A1 - Application number: 15/712,064 - Filed: 2017-09-21 - Published: 2018-11-08 - Earliest claimed: 2017-05-04 - Assignees: Wistron Neweb Corp. - Applicants: Wistron NeWeb Corp. - Inventors: Shih-Chiang WEI; Yu-Yu CHIANG - Web page: https://patentgrep.com/patent/US20180323495A1 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 1/2266: {disposed inside the computer} - 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 5/321: within a radiating element or between connected radiating elements - H01Q 5/328: between a radiating element and ground - H01Q 5/385: Two or more parasitic elements - H01Q 5/392: the parasitic elements having dual-band or multi-band characteristics - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A mobile device includes a supporting element, a ground element, and an antenna structure. The antenna structure includes a first feeding radiation element, a second feeding radiation element, a first parasitic radiation element, a second parasitic radiation element, and a third parasitic radiation element. The first feeding radiation element and the second feeding radiation element are both coupled to a signal feeding point. Each of the first parasitic radiation element, the second parasitic radiation element, and the third parasitic radiation element is coupled to the ground element. A first coupling gap is formed between the first parasitic radiation element and the first feeding radiation element. A second coupling gap is formed between the second parasitic radiation element and the first feeding radiation element. A third coupling gap is formed between the third parasitic radiation element and the second feeding radiation element. ## Claims ### Claim 1 A mobile device, comprising: a supporting element, having a first surface and a second surface; a ground element; and an antenna structure, disposed on the first surface of the supporting element, wherein the antenna structure comprises: a first feeding radiation element, coupled to a signal feeding point; a second feeding radiation element, coupled to the signal feeding point; a first parasitic radiation element, coupled to the ground element, wherein a first coupling gap is formed between the first parasitic radiation element and the first feeding radiation element; a second parasitic radiation element, coupled to the ground element, wherein a second coupling gap is formed between the second parasitic radiation element and the first feeding radiation element; and a third parasitic radiation element, coupled to the ground element, wherein a third coupling gap is formed between the third parasitic radiation element and the second feeding radiation element. ### Claim 2 (depends on 1) The mobile device as claimed in claim 1, wherein the ground element extends from the second surface to the first surface of the supporting element. ### Claim 3 (depends on 1) The mobile device as claimed in claim 1, wherein at least a portion of the first surface of the supporting element is in a smooth arc-shape. ### Claim 4 (depends on 3) The mobile device as claimed in claim 3, further comprising: metal back cover, disposed adjacent to the supporting element, wherein the metal back cover is coupled through a conductive material to the ground element. ### Claim 5 (depends on 4) The mobile device as claimed in claim 4, wherein the first feeding radiation element is positioned at a point on the first surface of the supporting element having a perpendicular distance to the metal back cover greater than 50 percent of the longest perpendicular distance between the point and the metal back cover. ### Claim 6 (depends on 5) The mobile device as claimed in claim 5, wherein the point is a peak point on the smooth arc-shape of the first surface of the supporting element having the longest perpendicular distance between the peak point and the metal back cover. ### Claim 7 (depends on 1) The mobile device as claimed in claim 1, wherein the first feeding radiation element and the second feeding radiation element substantially extend in opposite directions. ### Claim 8 (depends on 1) The mobile device as claimed in claim 1, wherein the first parasitic radiation element is separated from the second parasitic radiation element and the third parasitic radiation element by a structure of the first feeding radiation element connected to the second feeding radiation element. ### Claim 9 (depends on 1) The mobile device as claimed in claim 1, wherein the antenna structure covers a low-frequency band from about 2400 MHz to about 2500 MHz, and a high-frequency band from about 5150 MHz to about 5850 MHz. ### Claim 10 (depends on 9) The mobile device as claimed in claim 9, wherein the first feeding radiation element substantially has a straight-line shape with a length substantially equal to 0.5 wavelength of the low-frequency band, and the second feeding radiation element substantially has a straight-line shape with a length substantially equal to 0.25 wavelength of the high-frequency band. ### Claim 11 (depends on 9) The mobile device as claimed in claim 9, wherein the first parasitic radiation element substantially has an L-shape, and a length of the first parasitic radiation element is substantially equal to 0.25 wavelength of the low-frequency band. ### Claim 12 (depends on 9) The mobile device as claimed in claim 9, wherein the second parasitic radiation element substantially has an L-shape, and a length of the second parasitic radiation element is substantially equal to 0.25 wavelength of the low-frequency band. ### Claim 13 (depends on 9) The mobile device as claimed in claim 9, wherein the third parasitic radiation element substantially has an N-shape, and a length of the third parasitic radiation element is substantially equal to 0.25 wavelength of the high-frequency band. ### Claim 14 (depends on 9) The mobile device as claimed in claim 9, wherein the first parasitic radiation element is excited by the first feeding radiation element using a coupling mechanism, so as to form the low-frequency band. ### Claim 15 (depends on 9) The mobile device as claimed in claim 9, wherein the second parasitic radiation element is further excited by the first feeding radiation element using a coupling mechanism, so as to widen the low-frequency band. ### Claim 16 (depends on 9) The mobile device as claimed in claim 9, wherein the third parasitic radiation element is excited by the second feeding radiation element using a coupling mechanism, so as to form the high-frequency band. ### Claim 17 (depends on 1) The mobile device as claimed in claim 1, wherein a width of each of the first coupling gap, the second coupling gap, and the third coupling gap is shorter than 3 mm. ### Claim 18 (depends on 1) The mobile device as claimed in claim 1, wherein the second parasitic radiation element further comprises an extension portion extending toward the first feeding radiation element, so as to reduce a width of the second coupling gap. ### Claim 19 (depends on 1) The mobile device as claimed in claim 1, wherein the first feeding radiation element further comprises an extension portion extending toward the second parasitic radiation element, so as to reduce a width of the second coupling gap. ### Claim 20 An antenna structure, comprising: a first feeding radiation element, coupled to a signal feeding point; a second feeding radiation element, coupled to the signal feeding point; a first parasitic radiation element, coupled to a ground element, wherein a first coupling gap is formed between the first parasitic radiation element and the first feeding radiation element; a second parasitic radiation element, coupled to the ground element, wherein a second coupling gap is formed between the second parasitic radiation element and the first feeding radiation element; and a third parasitic radiation element, coupled to the ground element, wherein a third coupling gap is formed between the third parasitic radiation element and the second feeding radiation element.