# US 2018/0026338 A1 · Antenna structure and wireless communication device using same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026338 A1 - Document ID: US20180026338A1 - Status: Published application - Kind: A1 - Application number: 15/655,906 - Filed: 2017-07-21 - Published: 2018-01-25 - Earliest claimed: 2016-07-21 - Assignees: Chiun Mai Communication Systems, Inc. - Applicants: Chiun Mai Communication Systems, Inc. - Inventors: YEN-HUI LIN; YUN-JIAN CHANG; JUNG-CHIN LIN - Web page: https://patentgrep.com/patent/US20180026338A1 ## CPC - H01Q 1/242: {specially adapted for hand-held use} - H01Q 1/243: {with built-in antennas} - H01Q 1/48: Earthing means; Earth screens; Counterpoises - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 5/10: Resonant antennas - H01Q 5/35: using two or more simultaneously fed points - H01Q 5/378: Combination of fed elements with parasitic elements - H01Q 5/50: Feeding or matching arrangements for broad-band or multi-band operation - H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength - H01Q 5/371: Branching current paths - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - H01Q 13/18: the slot being backed by, or formed in boundary wall of, a resonant cavity (longitudinally slotted cylinder H01Q13/12 ){; Open cavity antennas} - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H04M 1/026: {Details of the structure or mounting of specific components} - H04M 1/0264: {for a camera module assembly} - H04M 1/0266: {for a display module assembly} - 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 An antenna structure includes a metal housing, a first resonance portion, a second resonance portion, an extending portion, and a signal feed source. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a groove and a gap. The metal housing is divided into at least an antenna section by the slot, the groove, and the gap. The first and second resonance portions and the extending portion are spaced apart from each other. The first resonance portion and the extending portion are both directly and electrically connected to the antenna section or are spaced apart and electrically coupled to the antenna section. The second resonance portion is electrically connected to the antenna section. One resonance portion is electrically connected to the signal feed source and the other resonance portion is grounded. ## Claims ### Claim 1 An antenna structure comprising: a metal housing, the metal housing comprising a front frame, a backboard, and a side frame, the side frame being between the front frame and the backboard; wherein the side frame defines a slot, the front frame defines a groove and a gap, the groove and the gap both in communication with the slot and extend to cut across the front frame; wherein the metal housing is divided into at least an antenna section by the slot, the groove, and the gap; and wherein the antenna section comprises a first section and a second section perpendicular to the first section; a first resonance portion; a second resonance portion; an extending portion; and a signal feed source; wherein the first resonance portion, the second resonance portion, and the extending portion are spaced apart from each other and are at a receiving space defined from the first section and the second section to the groove and the gap; wherein the first resonance portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section; wherein the second resonance portion is electrically connected to the antenna section; wherein the extending portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section; and wherein one of the first resonance portion and the second resonance portion is electrically connected to the signal feed source, and the other one of the first resonance portion and the second resonance portion is grounded. ### Claim 2 (depends on 1) The antenna structure of claim 1, wherein the slot, the groove, and the gap are all filled with insulating material. ### Claim 3 (depends on 2) The antenna structure of claim 2, wherein the extending portion comprises a first extending section and a second extending section perpendicular to the first extending section, a junction of the first extending section and the second extending section forms a corner; wherein the extending portion is attached to the insulating material of the slot, and the corner of the extending portion is attached to a corner of the slot. ### Claim 4 (depends on 1) The antenna structure of claim 1, wherein the extending portion comprises a first extending section and a second extending section perpendicular to the first extending section, the first extending section is spaced apart from and parallel to the first section; and wherein the second extending section is spaced apart from and parallel to the second section. ### Claim 5 (depends on 4) The antenna structure of claim 4, wherein a junction of the first extending section and the second extending section forms a corner, a junction of the first section and the second section forms a corner, and the corner of the extending portion is spaced apart from and parallel to the corner of the antenna section. ### Claim 6 (depends on 1) The antenna structure of claim 1, wherein the antenna section is on a first plane, the extending portion is on a second plane, the backboard is on a third plane; wherein the first plane, the second plane, and the third plane are different from each other and are parallel to each other, and the second plane is between the first plane and the third plane. ### Claim 7 (depends on 1) The antenna structure of claim 1, wherein one portion of the extending portion is positioned between the first resonance portion and the backboard; another portion of the extending portion is positioned between the second resonance portion and the backboard. ### Claim 8 (depends on 1) The antenna structure of claim 1, wherein the extending portion comprises a plurality of extending arms and the extending portion is electrically connected to the antenna section. ### Claim 9 (depends on 1) The antenna structure of claim 1, wherein the extending portion comprises two extending arms, one of the two extending arms is electrically connected to the antenna section and forms a T-shaped structure with the other of the two extending arms. ### Claim 10 (depends on 1) The antenna structure of claim 1, wherein the extending portion is spaced apart from the antenna section and is grounded. ### Claim 11 (depends on 10) The antenna structure of claim 10, wherein the side frame comprises an end portion, a first side portion, and a second side portion, the first side portion and the second side portion are respectively connected to two ends of the end portion; wherein the slot is at least defined on the end portion; wherein the first resonance portion comprises a first connecting arm, a first resonance section, and a second resonance section, the first connecting arm is electrically connected to the signal feed source; wherein the first resonance section is perpendicularly connected to the end of the first connecting arm away from the signal feed source and extends along a direction parallel to the first side portion towards the end portion until the first resonance section is electrically connected to the first section; wherein the second resonance section is perpendicularly connected to the end of the first resonance section away from the first side portion and extends towards the second side portion. ### Claim 12 (depends on 11) The antenna structure of claim 11, wherein the second resonance portion comprises a second connecting arm and a resonance arm, one end of the second connecting arm is grounded; wherein the resonance arm is electrically connected to another end of the second connecting arm and extends along a direction parallel to the end portion towards the first side portion until the resonance arm is perpendicularly connected to the side of the second section adjacent to the groove. ### Claim 13 (depends on 12) The antenna structure of claim 12, wherein the antenna section, the first resonance portion, the second resonance portion, and the extending portion cooperatively form an antenna, the antenna comprises a matching circuit, the matching circuit is electrically connected to the first resonance portion and the second resonance portion to adjust and optimize a bandwidth and an impedance matching of the antenna. ### Claim 14 (depends on 13) The antenna structure of claim 13, wherein the matching circuit comprises a first matching element, a second matching element, and a third matching element, one end of the first matching element is electrically connected between the first connecting arm and the signal feed source, another end of the first matching element is grounded; wherein one end of the second matching element is electrically connected between the first matching element and the first connecting arm, another end of the second matching element is grounded; wherein one end of the third matching element is electrically connected to the second connecting section and another end of the third matching element is grounded. ### Claim 15 (depends on 1) The antenna structure of claim 1, wherein when the signal feed source supplies current, the current flows through the first resonance portion, directly flows to the antenna section through the first resonance portion, flows to the second resonance portion, and is grounded through the second resonance portion; wherein the signal feed source, the first resonance portion, and the second resonance portion cooperatively form a loop antenna to activate a first frequency band through a method of a half of a wavelength; wherein when the signal feed source supplies current, the current flows through the first resonance portion, directly flows to the antenna section through the first resonance portion, and flows to the extending portion; the signal feed source, the first resonance portion, the antenna section, and the extending portion cooperatively form a monopole antenna to activate a second frequency band through a method of a quarter of a wavelength; wherein a frequency multiplication of the resonance frequency further activates a third frequency band; wherein a frequency of the third frequency band is higher than a frequency of the second frequency band; and wherein a frequency of the second frequency band is higher than a frequency of the first frequency band. ### Claim 16 (depends on 1) The antenna structure of claim 1, wherein the backboard is an integrally formed metallic sheet, the backboard is directly connected to the side frame and there is no gap formed between the backboard and the side frame, the backboard does not define any slot, break line, or gap to divide the backboard. ### Claim 17 A wireless communication device comprising: an antenna structure, the antenna structure comprising: a metal housing, the metal housing comprising a front frame, a backboard, and a side frame, the side frame being between the front frame and the backboard; wherein the side frame defines a slot, the front frame defines a groove and a gap, the groove and the gap both in communication with the slot and extend to cut across the front frame; wherein the metal housing is divided into at least an antenna section by the slot, the groove, and the gap; and wherein the antenna section comprises a first section and a second section perpendicular to the first section; a first resonance portion; a second resonance portion; an extending portion; and a signal feed source; wherein the first resonance portion, the second resonance portion, and the extending portion are spaced apart from each other and are at a receiving space defined from the first section and the second section to the groove and the gap; wherein the first resonance portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section; wherein the second resonance portion is electrically connected to the antenna section; wherein the extending portion is directly and electrically connected to the antenna section or is spaced apart and electrically coupled to the antenna section; and wherein one of the first resonance portion and the second resonance portion is electrically connected to the signal feed source, and the other one of the first resonance portion and the second resonance portion is grounded. ### Claim 18 (depends on 17) The wireless communication device of claim 17, further comprising a display, wherein the front frame, the backboard, and the side frame cooperatively form a metal metal housing of the wireless communication device; wherein the front frame defines an opening, the display is received in the opening, a display surface of the display is exposed at the opening and is positioned parallel to the backboard. ### Claim 19 (depends on 17) The wireless communication device of claim 17, further comprising double camera lenses and a flash light, wherein the backboard defines holes for exposing double camera lenses and the flash light. ### Claim 20 (depends on 17) The wireless communication device of claim 17, wherein the slot, the groove, and the gap are all filled with insulating material. ### Claim 21 (depends on 20) The wireless communication device of claim 20, wherein the extending portion comprises a first extending section and a second extending section perpendicular to the first extending section, a junction of the first extending section and the second extending section forms a corner; wherein the extending portion is attached to the insulating material of the slot, and the corner of the extending portion is attached to a corner of the slot. ### Claim 22 (depends on 17) The wireless communication device of claim 17, wherein the extending portion comprises a first extending section and a second extending section perpendicular to the first extending section, the first extending section is spaced apart from and parallel to the first section; and wherein the second extending section is spaced apart from and parallel to the second section. ### Claim 23 (depends on 22) The wireless communication device of claim 22, wherein a junction of the first extending section and the second extending section forms a corner, a junction of the first section and the second section forms a corner, and the corner of the extending portion is spaced apart from and parallel to the corner of the antenna section. ### Claim 24 (depends on 17) The wireless communication device of claim 17, wherein the antenna section is on a first plane, the extending portion is on a second plane, the backboard is on a third plane; the first plane, the second plane, and the third plane are different from each other and are parallel to each other, and the second plane is between the first plane and the third plane. ### Claim 25 (depends on 17) The wireless communication device of claim 17, wherein one portion of the extending portion is positioned between the first resonance portion and the backboard; another portion of the extending portion is positioned between the second resonance portion and the backboard. ### Claim 26 (depends on 17) The wireless communication device of claim 17, wherein the extending portion comprises a plurality of extending arms and the extending portion is electrically connected to the antenna section. ### Claim 27 (depends on 17) The wireless communication device of claim 17, wherein the extending portion comprises two extending arms, one of the two extending arms is electrically connected to the antenna section and forms a T-shaped structure with the other of the two extending arms. ### Claim 28 (depends on 17) The wireless communication device of claim 17, wherein the extending portion is spaced apart from the antenna section and is grounded. ### Claim 29 (depends on 28) The wireless communication device of claim 28, wherein the side frame comprises an end portion, a first side portion, and a second side portion, the first side portion and the second side portion are respectively connected to two ends of the end portion; wherein the slot is at least defined on the end portion; wherein the first resonance portion comprises a first connecting arm, a first resonance section, and a second resonance section, the first connecting arm is electrically connected to the signal feed source; wherein the first resonance section is perpendicularly connected to the end of the first connecting arm away from the signal feed source and extends along a direction parallel to the first side portion towards the end portion until the first resonance section is electrically connected to the first section; wherein the second resonance section is perpendicularly connected to the end of the first resonance section away from the first side portion and extends towards the second side portion. ### Claim 30 (depends on 29) The wireless communication device of claim 29, wherein the second resonance portion comprises a second connecting arm and a resonance arm, one end of the second connecting arm is grounded; wherein the resonance arm is electrically connected to another end of the second connecting arm and extends along a direction parallel to the end portion towards the first side portion until the resonance arm is perpendicularly connected to the side of the second section adjacent to the groove. ### Claim 31 (depends on 30) The wireless communication device of claim 30, wherein the antenna section, the first resonance portion, the second resonance portion, and the extending portion cooperatively form an antenna, the antenna comprises a matching circuit, the matching circuit is electrically connected to the first resonance portion and the second resonance portion to adjust and optimize a bandwidth and an impedance matching of the antenna. ### Claim 32 (depends on 31) The wireless communication device of claim 31, wherein the matching circuit comprises a first matching element, a second matching element, and a third matching element, one end of the first matching element is electrically connected between the first connecting arm and the signal feed source, another end of the first matching element is grounded; wherein one end of the second matching element is electrically connected between the first matching element and the first connecting arm, another end of the second matching element is grounded; wherein one end of the third matching element is electrically connected to the second connecting section and another end of the third matching element is grounded. ### Claim 33 (depends on 17) The wireless communication device of claim 17, wherein when the signal feed source supplies current, the current flows through the first resonance portion, directly flows to the antenna section through the first resonance portion, flows to the second resonance portion, and is grounded through the second resonance portion; the signal feed source, the first resonance portion, and the second resonance portion cooperatively form a loop antenna to activate a first frequency band through a method of a half of a wavelength; wherein when the signal feed source supplies current, the current flows through the first resonance portion, directly flows to the antenna section through the first resonance portion, and flows to the extending portion; wherein the signal feed source, the first resonance portion, the antenna section, and the extending portion cooperatively form a monopole antenna to activate a second frequency band through a method of a quarter of a wavelength; wherein a frequency multiplication of the resonance frequency further activates a third frequency band; a frequency of the third frequency band is higher than a frequency of the second frequency band; and wherein a frequency of the second frequency band is higher than a frequency of the first frequency band. ### Claim 34 (depends on 17) The wireless communication device of claim 17, wherein the backboard is an integrally formed metallic sheet, the backboard is directly connected to the side frame and there is no gap formed between the backboard and the side frame, the backboard does not define any slot, break line, or gap to divide the backboard.