# US 2018/0026345 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 2018/0026345 A1 - Document ID: US20180026345A1 - Status: Published application - Kind: A1 - Application number: 15/647,281 - Filed: 2017-07-12 - Published: 2018-01-25 - Earliest claimed: 2016-07-19 - Assignees: Chiun Mai Communication Systems, Inc. - Applicants: Chiun Mai Communication Systems, Inc. - Inventors: CHENG-HAN LEE; YI-WEN HSU; WEI-XUAN YE - Web page: https://patentgrep.com/patent/US20180026345A1 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 1/528: {reducing the re-radiation of a support structure (in a parabolic reflector antenna H01Q19/023)} - 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 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 An antenna structure includes a metal housing, a first feed source, and a first radiator. 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 gap. The metal housing is divided into at least a long portion and a short portion by the slot and the gap. The first radiator is positioned in the housing and includes a first radiating portion and a second radiating portion. One end of the first radiating portion is electrically connected to the first feed source and another end of the first radiating portion is spaced apart from the long portion. One end of the second radiating portion is electrically connected to the first feed source and another end of the second radiating portion is electrically connected to the short portion. ## 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 positioned between the front frame and the backboard; wherein the side frame defines a slot and the front frame defines a gap, the gap communicates with the slot and extends across the front frame; the metal housing is divided into at least a long portion and a short portion by the slot and the gap; a first feed source; and a first radiator, the first radiator positioned in the housing and comprising a first radiating portion and a second radiating portion; wherein one end of the first radiating portion is electrically connected to the first feed source, another end of the first radiating portion is spaced apart from the long portion; one end of the second radiating portion is electrically connected to the first feed source, and another end of the second radiating portion is electrically connected to the short portion. ### Claim 2 (depends on 1) The antenna structure of claim 1, wherein the slot and the gap are both filled with insulating material. ### Claim 3 (depends on 1) The antenna structure of claim 1, 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; the first radiating portion comprises a first radiating section, a second radiating section, and a third radiating section, the first radiating section is electrically connected to the first feed source and extends along a direction parallel to the end portion towards the first side portion until the first radiating section passes over the gap; one end of the second radiating section is perpendicularly connected to an end of the first radiating section away from the first feed source, another end of the second radiating section extends along a direction parallel to the second side portion towards the long portion and forms an L-shaped structure with the first radiating section; the third radiating section is spaced apart from and parallel to the long portion, the third radiating section is perpendicularly connected to the end of the second radiating section away from the first radiating section and extends along two directions towards the first side portion and the second side portion respectively to form a T-shaped structure with the second radiating section. ### Claim 4 (depends on 3) The antenna structure of claim 3, wherein a first portion of the front frame extending from a first side of the gap to a first end of the slot forms the long portion, when the first feed source supplies current, the current flows through the first radiating section, the second radiating section, and the third radiating section, the current is further coupled to the long portion through the third radiating section, flows through the first side portion from the long portion, and flows to the backboard to activate a first mode to generate radiation signals in a first frequency band. ### Claim 5 (depends on 4) The antenna structure of claim 4, further comprising a first switching circuit and a second switching circuit, wherein the first switching circuit comprises a first switching unit and a plurality of first switching elements, the first switching unit is electrically connected to the long portion, the first switching elements are connected in parallel, one end of each first switching element is electrically connected to the first switching unit, and another end of each first switching element is electrically connected to the backboard; the second switching circuit comprises a second switching unit and a plurality of second switching elements, the first feed source is electrically connected to the first radiating section through a matching circuit, the second switching unit is electrically connected to the matching circuit, the second switching elements are connected in parallel, one end of each second switching element is electrically connected to the second switching unit, and another end of each second switching element is electrically connected to the backboard; and through controlling the first switching unit and/or of the second switching unit to switch, the first switching unit and/or the second switching unit are switched to different first switching elements and/or second switching elements and the first frequency band is adjusted. ### Claim 6 (depends on 5) The antenna structure of claim 5, wherein the second radiating portion is a capacitor, one end of the second radiating portion is electrically connected to the first feed source, and another end of the second radiating portion is electrically connected to the short portion. ### Claim 7 (depends on 5) The antenna structure of claim 5, wherein a second portion of the front frame extending from a second side of the gap to a second end of the slot forms the short portion, the long portion is longer than the short portion; when the first feed source supplies current, the current directly flows through the short portion through the second radiating portion, and flows to the second side portion and the backboard to activate a second mode to generate radiation signals in a second frequency band, a frequency of the second frequency band is higher than a frequency of the first frequency band; when the first feed source supplies current, the current flows through the short portion through the second radiating portion, is coupled to the long portion through the gap, flows through the first switching circuit, and flows to the backboard to activate a third mode to generate radiation signals in a third frequency band; a frequency of the third frequency band is higher than the frequency of the second frequency band. ### Claim 8 (depends on 7) The antenna structure of claim 7, wherein the first switching circuit further comprises only one resonance circuit, the resonance circuit is electrically connected between the long portion and the backboard. ### Claim 9 (depends on 7) The antenna structure of claim 7, wherein the first switching circuit further comprises a plurality of resonance circuits, a number of the resonance circuits is equal to a number of the first switching elements, each resonance circuit is electrically connected in parallel to one of the first switching elements between the first switching unit and the backboard, when the first frequency band is adjusted, the plurality of resonance circuits keeps the third frequency band unchanged. ### Claim 10 (depends on 7) The antenna structure of claim 7, wherein the first switching circuit comprises a plurality of resonance circuits, a number of the resonance circuits is equal to a number of the first switching elements, each resonance circuit is electrically connected in parallel to one of the first switching elements between the first switching unit and the backboard, when the first frequency band is adjusted, the plurality of resonance circuits correspondingly adjusts the third frequency band. ### Claim 11 (depends on 1) The antenna structure of claim 1, further comprising a second radiator and a second feed source, wherein the second radiator is positioned adjacent to the long portion, the second radiator is substantially rectangular, the second radiator is electrically connected to the front frame and extends towards the second side portion; the second feed source is positioned on the front frame and is electrically connected to the second radiator; when the second feed source supplies current, the current flows through the second radiator to activate a fourth mode to generate radiation signals in a fourth frequency band. ### Claim 12 (depends on 11) The antenna structure of claim 11, further comprising a third switching circuit, wherein one end of the third switching circuit is electrically connected to the second radiator and another end of the third switching circuit is electrically connected to the backboard for adjusting the fourth frequency band. ### Claim 13 (depends on 11) The antenna structure of claim 11, wherein a wireless communication device uses at least two of the long portion, the short portion, and the first radiator to receive and/or transmit wireless signals at multiple frequency bands simultaneously through carrier aggregation (CA) technology of Long Term Evolution Advanced (LTE-A). ### Claim 14 (depends on 1) The antenna structure of claim 1, wherein the backboard is an integral and single 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, and/or gap for dividing the backboard. ### Claim 15 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 positioned between the front frame and the backboard; wherein the side frame defines a slot and the front frame defines a gap, the gap communicates with the slot and extends across the front frame; the metal housing is divided into at least a long portion and a short portion by the slot and the gap; a first feed source; and a first radiator, the first radiator positioned in the housing and comprising a first radiating portion and a second radiating portion; wherein one end of the first radiating portion is electrically connected to the first feed source, another end of the first radiating portion is spaced apart from the long portion; one end of the second radiating portion is electrically connected to the first feed source, and another end of the second radiating portion is electrically connected to the short portion. ### Claim 16 (depends on 15) The wireless communication device of claim 15, further comprising a display, wherein the front frame, the backboard, and the side frame cooperatively form a metal housing of the wireless communication device, 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 17 (depends on 15) The wireless communication device of claim 15, further comprising a Universal Serial Bus (USB) module, wherein the side frame defines a through hole, the USB module corresponds to the through hole and is partially exposed from the through hole. ### Claim 18 (depends on 15) The wireless communication device of claim 15, wherein the slot and the gap are both filled with insulating material. ### Claim 19 (depends on 15) The wireless communication device of claim 15, 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; the first radiating portion comprises a first radiating section, a second radiating section, and a third radiating section, the first radiating section is electrically connected to the first feed source and extends along a direction parallel to the end portion towards the first side portion until the first radiating section passes over the gap; one end of the second radiating section is perpendicularly connected to an end of the first radiating section away from the first feed source, another end of the second radiating section extends along a direction parallel to the second side portion towards the long portion and forms an L-shaped structure with the first radiating section; the third radiating section is spaced apart from and parallel to the long portion, the third radiating section is perpendicularly connected to the end of the second radiating section away from the first radiating section and extends along two directions towards the first side portion and the second side portion respectively to form a T-shaped structure with the second radiating section. ### Claim 20 (depends on 19) The wireless communication device of claim 19, wherein a first portion of the front frame extending from a first side of the gap to a first end of the slot forms the long portion, when the first feed source supplies current, the current flows through the first radiating section, the second radiating section, and the third radiating section, the current is further coupled to the long portion through the third radiating section, flows through the first side portion from the long portion, and flows to the backboard to activate a first mode to generate radiation signals in a first frequency band. ### Claim 21 (depends on 20) The wireless communication device of claim 20, wherein the antenna structure further comprises a first switching circuit and a second switching circuit, the first switching circuit comprises a first switching unit and a plurality of first switching elements, the first switching unit is electrically connected to the long portion, the first switching elements are connected in parallel, one end of each first switching element is electrically connected to the first switching unit, and another end of each first switching element is electrically connected to the backboard; the second switching circuit comprises a second switching unit and a plurality of second switching elements, the first feed source is electrically connected to the first radiating section through a matching circuit, the second switching unit is electrically connected to the matching circuit, the second switching elements are connected in parallel, one end of each second switching element is electrically connected to the second switching unit, and another end of each second switching element is electrically connected to the backboard; and through controlling the first switching unit and/or of the second switching unit to switch, the first switching unit and/or the second switching unit are switched to different first switching elements and/or second switching elements and the first frequency band is adjusted. ### Claim 22 (depends on 21) The wireless communication device of claim 21, wherein the second radiating portion is a capacitor, one end of the second radiating portion is electrically connected to the first feed source, and another end of the second radiating portion is electrically connected to the short portion. ### Claim 23 (depends on 21) The wireless communication device of claim 21, wherein a second portion of the front frame extending from a second side of the gap to a second end of the slot forms the short portion, the long portion is longer than the short portion; when the first feed source supplies current, the current directly flows through the short portion through the second radiating portion, and flows to the second side portion and the backboard to activate a second mode to generate radiation signals in a second frequency band, a frequency of the second frequency band is higher than a frequency of the first frequency band; when the first feed source supplies current, the current flows through the short portion through the second radiating portion, is coupled to the long portion through the gap, flows through the first switching circuit, and flows to the backboard to activate a third mode to generate radiation signals in a third frequency band; a frequency of the third frequency band is higher than the frequency of the second frequency band. ### Claim 24 (depends on 23) The wireless communication device of claim 23, wherein the first switching circuit further comprises only one resonance circuit, the resonance circuit is electrically connected between the long portion and the backboard. ### Claim 25 (depends on 23) The wireless communication device of claim 23, wherein the first switching circuit further comprises a plurality of resonance circuits, a number of the resonance circuits is equal to a number of the first switching elements, each resonance circuit is electrically connected in parallel to one of the first switching elements between the first switching unit and the backboard, when the first frequency band is adjusted, the plurality of resonance circuits keeps the third frequency band unchanged. ### Claim 26 (depends on 23) The wireless communication device of claim 23, wherein the first switching circuit comprises a plurality of resonance circuits, a number of the resonance circuits is equal to a number of the first switching elements, each resonance circuit is electrically connected in parallel to one of the first switching elements between the first switching unit and the backboard, when the first frequency band is adjusted, the plurality of resonance circuits correspondingly adjusts the third frequency band. ### Claim 27 (depends on 15) The wireless communication device of claim 15, wherein the antenna structure further comprises a second radiator and a second feed source, the second radiator is positioned adjacent to the long portion, the second radiator is substantially rectangular, the second radiator is electrically connected to the front frame and extends towards the second side portion; the second feed source is positioned on the front frame and is electrically connected to the second radiator; when the second feed source supplies current, the current flows through the second radiator to activate a fourth mode to generate radiation signals in a fourth frequency band. ### Claim 28 (depends on 27) The wireless communication device of claim 27, wherein the antenna structure further comprises a third switching circuit, one end of the third switching circuit is electrically connected to the second radiator and another end of the third switching circuit is electrically connected to the backboard for adjusting the fourth frequency band. ### Claim 29 (depends on 27) The wireless communication device of claim 27, wherein the wireless communication device uses at least two of the long portion, the short portion, and the first radiator to receive and/or transmit wireless signals at multiple frequency bands simultaneously through carrier aggregation (CA) technology of Long Term Evolution Advanced (LTE-A). ### Claim 30 (depends on 15) The wireless communication device of claim 15, wherein the backboard is an integral and single 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, and/or gap for dividing the backboard.