# US 7,746,280 B2 · Mobile terminal using an internal antenna with a conductive layer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,746,280 B2 - Document ID: US7746280B2 - Status: Granted - Kind: B2 - Application number: 11/758,748 - Filed: 2007-06-06 - Published: 2007-12-27 - Granted: 2010-06-29 - Earliest claimed: 2006-06-23 - Assignees: LG Electronics Inc. - Inventors: Chang-II Kim; Sung-Shin Kong - Web page: https://patentgrep.com/patent/US7746280B2 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 1/52: Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure (absorbing means H01Q17/00) - H01Q 5/371: Branching current paths - H01Q 5/378: Combination of fed elements with parasitic elements - H01Q 9/0421: {with a shorting wall or a shorting pin at one end of the element (H01Q9/0414 takes precedence)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A mobile communication terminal may be made smaller by using an internal antenna and a conductive layer. The conductive layer is spaced apart from the antenna by a fixed gap, and the conductive layer may be located either internally or externally to the terminal housing. The addition of the conductive layer provides a second resonant frequency in a higher frequency band than a first resonant frequency. Because the conductive layer has a relative smaller amount of radiation and is more directly affected by a human body than the internal antenna with a relatively larger amount of radiation, the performance characteristics of the terminal can be increased by a corresponding amount. ## Claims ### Claim 1 A mobile communication terminal comprising: a terminal housing further comprising a first housing part and a second housing part; a circuit board disposed within the first housing part; an antenna disposed within the terminal housing, the antenna having a first resonant frequency and a second resonant frequency; and a conductive layer disposed on the second housing part, wherein the conductive layer is electromagnetically coupled with the antenna, wherein the conductive layer is movably affixed to the second housing part and is coupled to a handle exposed to an exterior of the terminal housing, and wherein a portion of the conductive layer overlaps the antenna and the portion of the conductive layer overlapping the antenna is adjustable by manipulation of the handle. ### Claim 2 (depends on 1) The terminal of claim 1, wherein the first resonant frequency is within a first radio frequency communication band, and wherein the second resonant frequency is within a second and a third radio frequency communication band. ### Claim 3 (depends on 2) The terminal of claim 2, wherein the first radio frequency communication band is centered on 900 MHz. ### Claim 4 (depends on 2) The terminal of claim 2, wherein the second radio frequency communication band is centered on 1800 MHz. ### Claim 5 (depends on 2) The terminal of claim 2, wherein the third radio frequency communication band is centered on 1900 MHz. ### Claim 6 (depends on 1) The terminal of claim 1, wherein the antenna comprises a feeding portion electrically connected to the circuit board. ### Claim 7 (depends on 6) The terminal of claim 6, wherein the antenna is affixed to an inside surface of the second housing part, and the feeding portion is electrically connected to the circuit board when the second housing part is coupled with the first housing part. ### Claim 8 (depends on 7) The terminal of claim 7, wherein the conductive layer is affixed to an outside surface of the second housing part, and wherein the second housing part forms a fixed gap between the conducting layer and a planar surface of the antenna. ### Claim 9 (depends on 1) The terminal of claim 1, wherein the antenna is supported on and spaced apart from the circuit board by a dielectric spacer. ### Claim 10 (depends on 9) The terminal of claim 9, wherein the antenna comprises at least one through mounting hole into which at least one fixing protrusion formed on the dielectric spacer is inserted. ### Claim 11 (depends on 9) The terminal of claim 9, wherein the conductive layer is affixed to an inside surface of the second housing part, and wherein the conductive layer is spaced apart by a fixed gap from a planar surface of the antenna when the first housing part is coupled with the second housing part. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the conductive layer is disposed parallel to the planar surface of the antenna. ### Claim 13 A mobile communication terminal comprising: a terminal housing further comprising a first housing part coupled to a second housing part; a circuit board disposed within the first housing part; an antenna disposed within the terminal housing, the antenna having a first resonant frequency and a second resonant frequency, the first resonant frequency being within a first radio frequency communication band, and the second resonant frequency being within second and third radio frequency communication bands, wherein the second and third radio frequency communication bands have higher central frequencies than a central frequency of the first radio frequency communication band; and a conductive layer disposed on the second housing part and spaced apart and parallel to a planar surface of the antenna when the first housing part is coupled to the second housing part, the conductive layer electromagnetically coupled with the antenna, wherein the conductive layer is movably affixed to the second housing part and is coupled to a handle exposed to an exterior of the terminal housing, and wherein a portion of the conductive layer overlaps the antenna and the portion of the conductive layer overlapping the antenna is adjustable by manipulation of the handle. ### Claim 14 (depends on 13) The terminal of claim 13, wherein the conductive layer is affixed to one of the inside and outside surface of the second housing part. ### Claim 15 (depends on 14) The terminal of claim 14, wherein the antenna is affixed to the inside surface of the second housing part and the conductive layer is affixed to the outside surface of the second housing part.