EP2958189B1 - Communication device and antenna thereof - Google Patents

Communication device and antenna thereof Download PDF

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Publication number
EP2958189B1
EP2958189B1 EP14173310.5A EP14173310A EP2958189B1 EP 2958189 B1 EP2958189 B1 EP 2958189B1 EP 14173310 A EP14173310 A EP 14173310A EP 2958189 B1 EP2958189 B1 EP 2958189B1
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EP
European Patent Office
Prior art keywords
antenna
communication device
back cover
wire section
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14173310.5A
Other languages
German (de)
French (fr)
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EP2958189A1 (en
Inventor
Hsin-Cheng Su
Chun-Ta Liu
Shu-Chen Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
King Slide Technology Co Ltd
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King Slide Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by King Slide Technology Co Ltd filed Critical King Slide Technology Co Ltd
Priority to EP14173310.5A priority Critical patent/EP2958189B1/en
Publication of EP2958189A1 publication Critical patent/EP2958189A1/en
Application granted granted Critical
Publication of EP2958189B1 publication Critical patent/EP2958189B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • H01Q9/265—Open ring dipoles; Circular dipoles

Definitions

  • the present invention is related to a communication device and a communication device antenna capable of utilizing a metal housing for emitting and receiving radio signals of the communication device.
  • plastic housings are mainly used by manufacturers due to cost concerns, in order to maintain basic radiation characteristics of an antenna.
  • metal housing is currently brought by Apple iPhones and Macbooks. Since the metal housing has light weight, good heat dissipation, high strength, high impact resistance, good looking, anti-electromagnetic and recyclable characteristics, the metal housing is getting more and more popular. Therefore, the metal housings are mainly used in development of new generations of the mobile communication products.
  • US patent No. 8,054,231 B2 disclosed by Ahn et al teaches a metal case having a slot, which can be used as a slot antenna of a mobile device.
  • US 2007030204 A1 discloses an antenna ground structure, for use in an electronic apparatus including an antenna main body and electrically conductive plastic material connecting the antenna main body and a metal frame of the electronic apparatus to provide an electrical connection between the antenna main body and the metal frame.
  • the closest prior art document US2004257283 describes a plurality of antennas integrally formed in a metallic cover of a display unit of a laptop device.
  • the present invention aims at providing a communication device and a communication device antenna capable of utilizing a metal housing for emitting and receiving radio signals of the communication device.
  • the claimed communication device comprises a front housing; a display module; a display panel installed between the display module and the front housing; a back cover made of metal or plastic; a main body located between the front housing and the back cover, the main body being made of a non-conductive material; a printed circuit board installed on the main body and comprises a signal feed point and a ground point; an antenna installed on the main body, the antenna comprising a first metal part, a second metal part and a third metal part extended and connected between the first metal part and the second metal part, wherein the first metal part of the antenna is coupled to the signal feed point, and the second metal part of the antenna is coupled to the ground point; and a conductor, wherein a coupling gap is defined between the conductor and the antenna, at least one part of the conductor corresponds to the display panel, the conductor comprises a first conductive part, a second conductive part coupled to the first conductive part, and a slit is formed on the second conductive part,
  • FIG. 1 and FIG. 2 are diagrams showing a communication device 10 according to an embodiment of the present invention.
  • the communication device 10 comprises a front housing 12, a display module 14, a display panel 16, a back cover 18 and a main body 20.
  • the front housing 12 substantially is a rectangular frame defining a window 22, and the front housing 12 is made of a metal material, but not limited to it.
  • the display panel 16 is installed between the display module 14 and the front housing 12, and corresponds to the window 22 of the front housing 12.
  • the display panel 16 is made of glass, but not limited to it.
  • the back cover is substantially rectangular and located at a position corresponding to the front housing 12. More particularly, the main body 20 is located between the front housing 12 and the back cover 18.
  • the back cover 18 is made of a metal material, but not limited to it.
  • the back cover 18 can be made of plastic in other embodiment.
  • the back cover 18 is used for installing the display module 14 and the display panel 16 on the main body 20.
  • the main body 20 is made of a non-conductive material, such as a plastic material, but not limited to it.
  • Fig. 3 to FIG. 7 are diagrams further showing antenna arrangement of the communication device 10.
  • the antenna arrangement at least comprises a printed circuit board 24, an antenna 26 and a conductor 28.
  • the printed circuit board 24 is installed on the main body 20, and comprises a signal feed point 30 and a ground point 32. Please note that the printed circuit board 24 can be arranged in other size relative to the main body 20. In other words, the size of the printed circuit board 24 is not limited by the figures .
  • the communication device 10 further comprises a connection terminal 34 coupled to the ground point 32 of the printed circuit board 24. At least one part of the connection terminal 34 corresponds to the back cover 18, as shown in FIG. 5 . Therefore, when the back cover 18 is installed on the main body 20, the back cover 18 contacts the connection terminal 34.
  • the antenna 26 is installed on the main body 20, and corresponding to an edge of the display panel 16 adjacent to the antenna 26, such as a bottom edge of the display panel 16.
  • the antenna 26 comprises a first metal part 36, a second metal part 38 and a third metal part 40 extended and connected between the first metal part 36 and the second metal part 38.
  • the first metal part 36, the second metal part 38 and the third metal part 40 together form an approximate loop antenna trace, wherein the first metal part 36 is coupled to the signal feed point 30 of the printed circuit board 24, and the second metal part 38 is coupled to the ground point 32 of the printed circuit board 24.
  • the third metal part 40 comprises a first wire section 42a, a second wire section 42b, a third wire section 42c and a fourth wire section 42d.
  • the first wire section 42a is substantially parallel to the back cover 18.
  • the second wire section 42b is extended and connected between the first wire section 42a and the third wire section 42c, and at least one part of the second wire section 42b crosses the main body 20 and is substantially perpendicular to the back cover 18, in order to reduce coupling effect between metal parts.
  • the third wire section 42c is substantially parallel to the first wire section 42a.
  • the fourth wire section 42d is connected to the third wire section 42c, and at least one part of the fourth wire section 42d crosses the main body 20 and is substantially perpendicular to the back cover 18, in order to reduce coupling effect between metal parts as well.
  • a coupling gap 44 is defined between the conductor 28 and the antenna 26. More particularly, at least one part of the conductor 28 corresponds to the display panel 16, and the coupling gap 44 is defined between the conductor 28 and the third wire section 42c of the third metal part 40 of the antenna 26.
  • the coupling gap 44 is substantially smaller than 2mm.
  • the conductor 28 comprises a first conductive part 46a, a second conductive part 46b coupled to the first conductive part 46a.
  • a slit 48 is formed on the second conductive part 46b.
  • an area ratio between the first conductive part 46a and the second conductive part 46b is not limited to an area ratio shown in the figures, the figures only shows a preferred example.
  • One purpose of the conductor 28 of the present invention is to be properly matched with the antenna 26, for adjusting bandwidth.
  • Another purpose of the conductor 28 of the present invention is to guide electromagnetic radiation energy to the display panel 16.
  • radiofrequency energy can be transmitted to the antenna 26 and the back cover 18 via the signal feed point 30 and the ground point 32 of the printed circuit board 24, such that the back cover 18 can be utilized as a radiating surface, for transmitting and receiving radio signals of the communication device 10.
  • the coupling gap 44 can couple energy to the conductor 28. Since the conductor 28 is located at a position corresponding to a part of the display panel 16, even if the back cover 18 is made of plastic, the conductor 28 still can guide radiation energy of the antenna 26 to the display panel 16, so as to improve capability for emitting and receiving radio signals of the communication device 10.
  • efficacies and advantages of the present invention comprise that the antenna arrangement is applicable to both the metal back cover and the plastic back cover; and that when the back cover is made of the metal material, appearance of the back cover is not ruined by design of the antenna, and that in contrast to the prior art, the back cover has better appearance and great diversity of design.

Description

    Field of the Invention
  • The present invention is related to a communication device and a communication device antenna capable of utilizing a metal housing for emitting and receiving radio signals of the communication device.
    • Background of the Invention
  • During product development processes of conventional communication devices, such as mobile communication products, plastic housings are mainly used by manufacturers due to cost concerns, in order to maintain basic radiation characteristics of an antenna. However, a trend of metal housing is currently brought by Apple iPhones and Macbooks. Since the metal housing has light weight, good heat dissipation, high strength, high impact resistance, good looking, anti-electromagnetic and recyclable characteristics, the metal housing is getting more and more popular. Therefore, the metal housings are mainly used in development of new generations of the mobile communication products. For example, US patent No. 8,054,231 B2 disclosed by Ahn et al . teaches a metal case having a slot, which can be used as a slot antenna of a mobile device. But the slot may obviously ruin appearance of the metal case, and the slot needs to be arranged at a position corresponding to a specific area of the metal case. Therefore, it is important to design a proper antenna to allow electromagnetic waves to penetrate the metal case for achieving communication purposes without obviously ruining the appearance of the metal case. US 2007030204 A1 discloses an antenna ground structure, for use in an electronic apparatus including an antenna main body and electrically conductive plastic material connecting the antenna main body and a metal frame of the electronic apparatus to provide an electrical connection between the antenna main body and the metal frame.
  • The closest prior art document US2004257283 describes a plurality of antennas integrally formed in a metallic cover of a display unit of a laptop device.
  • When the metal case is replaced by a plastic case for cost reduction, performance of the antenna needs to be maintained as well. Therefore, it is also important to provide an antenna applicable to both the metal case and plastic case of the mobile communication product.
    • Summary of the Invention
  • This in mind, the present invention aims at providing a communication device and a communication device antenna capable of utilizing a metal housing for emitting and receiving radio signals of the communication device.
  • This is achieved by a communication device according to claim 1. . The dependent claims pertain to corresponding further developments and improvements.
  • As will be seen more clearly from the detailed description following below, the claimed communication device comprises a front housing; a display module; a display panel installed between the display module and the front housing; a back cover made of metal or plastic; a main body located between the front housing and the back cover, the main body being made of a non-conductive material; a printed circuit board installed on the main body and comprises a signal feed point and a ground point;
    an antenna installed on the main body, the antenna comprising a first metal part, a second metal part and a third metal part extended and connected between the first metal part and the second metal part, wherein the first metal part of the antenna is coupled to the signal feed point, and the second metal part of the antenna is coupled to the ground point; and a conductor, wherein a coupling gap is defined between the conductor and the antenna, at least one part of the conductor corresponds to the display panel, the conductor comprises a first conductive part, a second conductive part coupled to the first conductive part, and a slit is formed on the second conductive part, for the conductor to properly match with the antenna for adjusting bandwidth; the conductor guides an electromagnetic radiation energy to the display panel; when the communication device is turned on, the electromagnetic radiation energy can be transmitted to the antenna and the back cover via the signal feed point and the ground point of the printed circuit board such that the back cover can be utilized as a radiating surface, for transmitting and receiving radio signals of the communication device; and the electromagnetic radiation energy of the antenna is guided to the display panel through the conductor via the coupling gap that couples the electromagnetic radiation energy to the conductor.
    • Brief Description of the Drawings
  • In the following, the invention is further illustrated by way of example, taking reference to the accompanying drawings thereof:
    • FIG. 1 is a diagram showing a communication device according to an embodiment of the present invention,
    • FIG. 2 is an exploded view of the communication device according to the embodiment of the present invention,
    • FIG. 3 is an exploded view of arrangement of an antenna of the communication device according to an embodiment of the present invention,
    • FIG. 4 is a partial enlarged view of the arrangement of the antenna of the communication device according to the embodiment of the present invention,
    • FIG. 5 is a diagram showing arrangement between the back cover and the antenna according to an embodiment of the present invention,
    • FIG. 6 is a diagram showing arrangement of the communication device according to an embodiment of the present invention, and
    • FIG. 7 is an enlarged view of an area A in FIG. 6.
    Detailed Description
  • Fig. 1 and FIG. 2 are diagrams showing a communication device 10 according to an embodiment of the present invention. The communication device 10 comprises a front housing 12, a display module 14, a display panel 16, a back cover 18 and a main body 20. The front housing 12 substantially is a rectangular frame defining a window 22, and the front housing 12 is made of a metal material, but not limited to it. The display panel 16 is installed between the display module 14 and the front housing 12, and corresponds to the window 22 of the front housing 12. The display panel 16 is made of glass, but not limited to it. The back cover is substantially rectangular and located at a position corresponding to the front housing 12. More particularly, the main body 20 is located between the front housing 12 and the back cover 18. In a preferred embodiment, the back cover 18 is made of a metal material, but not limited to it. The back cover 18 can be made of plastic in other embodiment. The back cover 18 is used for installing the display module 14 and the display panel 16 on the main body 20. In addition, the main body 20 is made of a non-conductive material, such as a plastic material, but not limited to it.
  • Fig. 3 to FIG. 7 are diagrams further showing antenna arrangement of the communication device 10. The antenna arrangement at least comprises a printed circuit board 24, an antenna 26 and a conductor 28.
  • The printed circuit board 24 is installed on the main body 20, and comprises a signal feed point 30 and a ground point 32. Please note that the printed circuit board 24 can be arranged in other size relative to the main body 20. In other words, the size of the printed circuit board 24 is not limited by the figures .
  • In a preferred embodiment, the communication device 10 further comprises a connection terminal 34 coupled to the ground point 32 of the printed circuit board 24. At least one part of the connection terminal 34 corresponds to the back cover 18, as shown in FIG. 5. Therefore, when the back cover 18 is installed on the main body 20, the back cover 18 contacts the connection terminal 34.
  • The antenna 26 is installed on the main body 20, and corresponding to an edge of the display panel 16 adjacent to the antenna 26, such as a bottom edge of the display panel 16. The antenna 26 comprises a first metal part 36, a second metal part 38 and a third metal part 40 extended and connected between the first metal part 36 and the second metal part 38. The first metal part 36, the second metal part 38 and the third metal part 40 together form an approximate loop antenna trace, wherein the first metal part 36 is coupled to the signal feed point 30 of the printed circuit board 24, and the second metal part 38 is coupled to the ground point 32 of the printed circuit board 24.
  • In a preferred embodiment, the third metal part 40 comprises a first wire section 42a, a second wire section 42b, a third wire section 42c and a fourth wire section 42d. The first wire section 42a is substantially parallel to the back cover 18. The second wire section 42b is extended and connected between the first wire section 42a and the third wire section 42c, and at least one part of the second wire section 42b crosses the main body 20 and is substantially perpendicular to the back cover 18, in order to reduce coupling effect between metal parts. The third wire section 42c is substantially parallel to the first wire section 42a. The fourth wire section 42d is connected to the third wire section 42c, and at least one part of the fourth wire section 42d crosses the main body 20 and is substantially perpendicular to the back cover 18, in order to reduce coupling effect between metal parts as well.
  • A coupling gap 44 is defined between the conductor 28 and the antenna 26. More particularly, at least one part of the conductor 28 corresponds to the display panel 16, and the coupling gap 44 is defined between the conductor 28 and the third wire section 42c of the third metal part 40 of the antenna 26. The coupling gap 44 is substantially smaller than 2mm. According to the invention, the conductor 28 comprises a first conductive part 46a, a second conductive part 46b coupled to the first conductive part 46a. A slit 48 is formed on the second conductive part 46b. Please note that an area ratio between the first conductive part 46a and the second conductive part 46b is not limited to an area ratio shown in the figures, the figures only shows a preferred example. One purpose of the conductor 28 of the present invention is to be properly matched with the antenna 26, for adjusting bandwidth. Another purpose of the conductor 28 of the present invention is to guide electromagnetic radiation energy to the display panel 16.
  • According to the above arrangement, when the communication device 10 is turned on, radiofrequency energy can be transmitted to the antenna 26 and the back cover 18 via the signal feed point 30 and the ground point 32 of the printed circuit board 24, such that the back cover 18 can be utilized as a radiating surface, for transmitting and receiving radio signals of the communication device 10. In addition, the coupling gap 44 can couple energy to the conductor 28. Since the conductor 28 is located at a position corresponding to a part of the display panel 16, even if the back cover 18 is made of plastic, the conductor 28 still can guide radiation energy of the antenna 26 to the display panel 16, so as to improve capability for emitting and receiving radio signals of the communication device 10.
  • According to the above illustration, efficacies and advantages of the present invention comprise that the antenna arrangement is applicable to both the metal back cover and the plastic back cover; and that when the back cover is made of the metal material, appearance of the back cover is not ruined by design of the antenna, and that in contrast to the prior art, the back cover has better appearance and great diversity of design.

Claims (10)

  1. A communication device (10), comprising:
    a front housing (12);
    a display module (14);
    a display panel (16) installed between the display module (14) and the front housing (12);
    a back cover (18) made of metal or plastic;
    a main body (20) located between the front housing (12) and the back cover (18), the main body (20) being made of a non-conductive material;
    a printed circuit board (24) installed on the main body and comprises a signal feed point (30) and a ground point (32);
    an antenna (26) installed on the main body (20), the antenna (26) comprising a first metal part (36), a second metal part (38) and a third metal part (40) extended and connected between the first metal part (36) and the second metal part (38), wherein the first metal part (36) of the antenna (26) is coupled to the signal feed point (30), and the second metal part (38) of the antenna (26) is coupled to the ground point (32); and
    a conductor (28), wherein
    a coupling gap (44) is defined between the conductor (28) and the antenna (26), at least one part of the conductor (28) corresponds to the display panel (16);
    characterized in that
    the conductor (28) comprises a first conductive part (46a), a second conductive part (46b) coupled to the first conductive part (46a), and a slit (48) formed on the second conductive part (46b) for the conductor (28) to properly match with the antenna (26) to adjust the bandwidth;
    the conductor (28) guides an electromagnetic radiation energy to the display panel (16);
    when the communication device (10) is turned on, the electromagnetic radiation energy can be transmitted to the antenna (26) and the back cover (18) via the signal feed point (30) and the ground point (32) of the printed circuit board (24) such that the back cover (18) can be utilized as a radiating surface, for transmitting and receiving radio signals of the communication device (10); and
    the electromagnetic radiation energy of the antenna (26) is guided to the display panel (16) through the conductor (28) via the coupling gap (44) that couples the electromagnetic radiation energy to the conductor (28).
  2. The communication device of claim 1, characterized in that the front housing (12) substantially is a rectangular frame defining a window (22), and the display panel (16) corresponds to the window (22) of the front housing (12).
  3. The communication device of claim 1or 2, characterized in that the front housing (12) is made of a metal material.
  4. The communication device of any of claims 1-3, characterized in that the display panel (16) is made of glass.
  5. The communication device of any of claims 1-4, characterized in that the back cover (18) is made of a metal material.
  6. The communication device of claim 5, characterized in that the back cover (18) is coupled to the ground point (32).
  7. The communication device of any of claims 1-6, characterized in that the first metal part (36), the second metal part (38) and the third metal part (40) of the antenna (26) together form an approximate loop antenna trace.
  8. The communication device of any of claims 1-7, characterized in that the antenna (26) corresponds to an edge of the display panel (16) adjacent to the antenna (26).
  9. The communication device of any of claims 1-8, characterized in that the third metal part (40) of the antenna (26) comprises a first wire section (42a), a second wire section (42b), a third wire section (42c) and a fourth wire section (42d), wherein the first wire section (42a) is substantially parallel to the back cover (18), the second wire section (42b) is extended and connected between the first wire section (42a) and the third wire section (42c), at least one part of the second wire section (42b) crosses the main body (20) and is substantially perpendicular to the back cover (18), the fourth wire section (42d) is connected to the third wire section (42c), at least one part of the fourth wire section (42d) crosses the main body (20) and is substantially perpendicular to the back cover (18).
  10. The communication device of any of claims 1-9 further characterized by a connection terminal (34) coupled to the ground point (32), wherein at least one part of the connection terminal (34) corresponds to the back cover (18), when the back cover (18) is installed on the main body (20), the back cover (18) contacts the connection terminal (34).
EP14173310.5A 2014-06-20 2014-06-20 Communication device and antenna thereof Active EP2958189B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14173310.5A EP2958189B1 (en) 2014-06-20 2014-06-20 Communication device and antenna thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14173310.5A EP2958189B1 (en) 2014-06-20 2014-06-20 Communication device and antenna thereof

Publications (2)

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EP2958189A1 EP2958189A1 (en) 2015-12-23
EP2958189B1 true EP2958189B1 (en) 2023-05-31

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105633582B (en) 2015-12-25 2018-09-14 宇龙计算机通信科技(深圳)有限公司 A kind of communication terminal and its antenna assembly
US11115508B1 (en) * 2020-06-10 2021-09-07 Htc Corporation Wireless communication device and case assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040257283A1 (en) * 2003-06-19 2004-12-23 International Business Machines Corporation Antennas integrated with metallic display covers of computing devices
US7522108B2 (en) * 2005-08-04 2009-04-21 Amphenol Corporation Antenna ground structure
EP2204881A1 (en) * 2006-04-10 2010-07-07 Hitachi Metals, Ltd. Wide-band antenna device comprising a U-shaped conductor antenna
KR101501921B1 (en) 2008-05-06 2015-03-13 삼성전자주식회사 antenna structure for potable terminal having metal case
US8952860B2 (en) * 2011-03-01 2015-02-10 Apple Inc. Antenna structures with carriers and shields

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