# US 9,882,266 B2 · Mobile device having an interior multiband antenna and a partially metal back > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,266 B2 - Document ID: US9882266B2 - Status: Granted - Kind: B2 - Application number: 14/486,724 - Filed: 2014-09-15 - Published: 2016-03-17 - Granted: 2018-01-30 - Earliest claimed: 2014-09-15 - Assignees: BlackBerry Limited - Applicants: Blackberry Limited - Inventors: Dong Wang; Shirook M. Ali - Web page: https://patentgrep.com/patent/US9882266B2 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 1/50: Structural association of antennas with earthing switches, lead-in devices or lightning protectors - H01Q 5/371: Branching current paths - H01Q 5/378: Combination of fed elements with parasitic elements - H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H04M 1/0202: {Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets (constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A mobile device having an interior multiband antenna and a partially metal back is provided. The device comprises: a back side comprising: a conducting central portion; non-conducting portions comprising respective widths from respective end edges of the back side to the conducting central portion, the conducting central portion separating the non-conducting portions; an interior chassis covered by the back side; antennas located on the interior chassis behind each of the non-conducting portions, each of the antennas comprising at least two respective radiating arms configured to resonate in at least three frequency ranges; one or more antenna feeds connected to each of the antennas; and, a switch configured to select one or more of the antennas for operation. ## Claims ### Claim 1 A device comprising: a back side comprising: a conducting central portion; a first non-conducting portion comprising a first width from a first end edge of the back side to the conducting central portion; a second non-conducting portion opposite the first non-conducting portion, comprising a second width from a second end edge of the back side to the conducting central portion, the conducting central portion separating the first non-conducting portion and the second non-conducting portion; and a non-conducting chassis, the conducting central portion comprising a conducting sheet attached to an exterior of the non-conducting chassis, the first non-conducting portion and the second non-conducting portion each comprise opposite ends of the non-conducting chassis, and the first end edge and the second end edge comprises opposite end edges of the non-conducting chassis; an interior chassis covered by the back side, the first and second antennas located on a first side of the interior chassis; a first antenna located on the interior chassis behind the first non-conducting portion; a second antenna located on the interior chassis behind the second non-conducting portion, each of the first antenna and the second antenna comprising at least two respective radiating arms configured to resonate in at least three frequency ranges; an interior conducting plane located on a second side of the interior chassis opposite the first side of the interior chassis, each of the at least two respective radiating arms at least partially clearing the interior conducting plane; one or more antenna feeds connected to each of the first antenna and the second antenna; and, a switch configured to select one or more of the first antenna and the second antenna for operation. ### Claim 2 (depends on 1) The device of claim 1, wherein the at least two respective arms of each of the first antenna and the second antenna clear the conducting central portion of the back side. ### Claim 3 (depends on 1) The device of claim 1, wherein each of the first antenna and the second antenna further comprise: a first respective connection to the one more antenna feeds; and a second respective connection to a ground plane. ### Claim 4 (depends on 1) The device of claim 1, wherein each of the first antenna and the second antenna further comprise: a first respective connection to the one more antenna feeds; and a second respective connection to a ground plane, each of the first respective connection and the second respective connection being on opposite sides of a respective antenna radiating structure. ### Claim 5 (depends on 1) The device of claim 1, wherein each of the first antenna and the second antenna further comprise: a respective connection to the one more antenna feeds, the respective connection clearing the conducting central portion of the back side. ### Claim 6 (depends on 1) The device of claim 1, wherein each of the first antenna and the second antenna further comprise: a respective connection to a ground plane, the respective connection at least partially located behind the conducting central portion of the back side. ### Claim 7 (depends on 1) The device of claim 1, wherein at least a respective portion of one or more of the first antenna and the second antenna at least partially wraps around a respective end of the interior chassis. ### Claim 8 (depends on 1) The device of claim 1, wherein a first radiating arm of the at least two respective radiating arms is located closer to the conducting central portion than a second radiating arm of the at least two respective radiating arms, the first radiating arm configured to resonate in a lower frequency range than the second radiating arm. ### Claim 9 (depends on 7) The device of claim 7, wherein the first radiating arm and the second radiating arm are generally parallel to each other, electrically connected by a connecting portion but otherwise separated by a gap, the first radiating arm electrically connected to a ground plane at a respective end and the second radiating arm electrically connected to the one or more antenna feeds. ### Claim 10 (depends on 1) The device of claim 1, wherein the first width and the second width are different from each other. ### Claim 11 (depends on 1) The device of claim 1, further comprising a port through an end of the device adjacent the first antenna, the first antenna clearing the port. ### Claim 12 (depends on 1) The device of claim 1, further comprising a memory storing an antenna selection table, and the switch is configured to select one or more of the first antenna and the second antenna for operation based upon the antenna selection table. ### Claim 13 (depends on 1) The device of claim 1, wherein the conducting central portion covers about 80% of the back side. ### Claim 14 (depends on 1) The device of claim 1, wherein: a first one of the at least three frequency ranges comprises one or more of: a frequency range of about 710 MHz to about 960 MHz; an LTE (Long-Term Evolution) frequency range; and LTE700 frequency range; a second one of the at least three frequency ranges comprises one or more of: about 1710 to about 2100 MHz, a GSM (Global System for Mobile Communications) frequency range; a CDMA (Code Division Multiple Access) frequency range; a PCS (Personal Communications Service) frequency range; and a UMTS (Universal Mobile Telecommunications System) frequency range; and, a third one of the at least three frequency ranges comprises one or more of: about 2300 to about 2700 MHz, another GSM (Global System for Mobile Communications) frequency range; another CDMA (Code Division Multiple Access) frequency range; another PCS (Personal Communications Service) frequency range; and another UMTS (Universal Mobile Telecommunications System) frequency range. ### Claim 15 (depends on 11) The device of claim 11, wherein a portion of the interior conducting plane extends along the port.