EP2775562B1 - Kommunikationsvorrichtung und Antennenelement darin - Google Patents

Kommunikationsvorrichtung und Antennenelement darin Download PDF

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Publication number
EP2775562B1
EP2775562B1 EP13168114.0A EP13168114A EP2775562B1 EP 2775562 B1 EP2775562 B1 EP 2775562B1 EP 13168114 A EP13168114 A EP 13168114A EP 2775562 B1 EP2775562 B1 EP 2775562B1
Authority
EP
European Patent Office
Prior art keywords
antenna element
switch
communication device
antenna
band
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
EP13168114.0A
Other languages
English (en)
French (fr)
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EP2775562A1 (de
Inventor
Kin-Lu Wong
Meng-ting CHEN
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.)
Acer Inc
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Acer Inc
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Publication date
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Publication of EP2775562A1 publication Critical patent/EP2775562A1/de
Application granted granted Critical
Publication of EP2775562B1 publication Critical patent/EP2775562B1/de
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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
    • 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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the disclosure generally relates to a communication device, and more particularly, relates to a communication device comprising a reconfigurable dual-feed ground plane antenna element.
  • mobile communication devices With fast development in the wireless communication industry, functions of mobile communication devices have become more progressive in order to meet a variety of user requirements. Generally, mobile communication devices should be thin, but must also include many components. It is a critical challenge for antenna designers to design antenna elements with more functions and improved performance, with smaller available space in mobile communication devices.
  • WO 2011/021027 A2 describes an antenna arrangement comprising an electrically conductive radiating element having first and second ends, an electrically conductive ground plane or ground member, and an input terminal.
  • the radiating element has a plurality of separate feed points at different locations between its first and second ends, and the input terminal is provided with a switch.
  • Each feed point is electrically connected to the switch by way of a separate electrical pathway, the switch being configured to allow the separate feed points to be connected individually or in predetermined combinations to the input terminal by selecting between a plurality of selectable contacts.
  • At least one of the electrical pathways includes a capacitive circuit component connected in series, and at least one other of the electrical pathways includes an inductive circuit component connected in series.
  • the antenna arrangement allows for a high degree of customization and improved matching, and enables good multi-band performance.
  • WO 01/31732 A1 describes an antenna device for transmitting and receiving radio waves, connectable to a radio communication device, and comprising transmitter and receiver sections.
  • the receiver section includes a receiving antenna structure switchable between a plurality of antenna configuration states, each of which is distinguished by a set of radiation related parameters, such as resonance frequency, impedance, radiation pattern, polarization and bandwidth, and a switching device for selectively switching said antenna structure between said plurality of antenna configuration states.
  • the antenna device comprises further a receiving means for receiving a first measure representing the reflection coefficient in the transmitter section, and a control device for controlling the switching device of said receiver section, and thus the selective switching of the antenna structure between said plurality of antenna configuration states, in dependence on said first received measure representing the reflection coefficient.
  • JP 2012 256 999 describes a first antenna element, a second antenna element, and a MEMS (micro-electromechanical system) switch are provided, and a feeding point is provided at one end of the first antenna element.
  • the other end of the first antenna element is connected to a first terminal of the MEMS switch, and one end of the second antenna element is connected to a second terminal of the MEMS switch.
  • the one end of the first antenna element is grounded to a ground pattern via an inductor, and a ground terminal of the MEMS switch is connected to the other end of the first antenna element.
  • the invention is aimed to provide a communication device and a reconfigurable dual-feed ground plane antenna element therein, according to independent claim 1.
  • the ground plane antenna element mainly comprises an antenna element and a ground element in the communication device.
  • the antenna element comprises a first portion and a second portion.
  • a switch is disposed between the first portion and the second portion such that the antenna element can have a combination of different resonant current paths.
  • the switch is further configured to control the antenna element to excite a plurality of different resonant modes. Accordingly, the antenna element is capable of operating in the multiple bands.
  • the total length of the first portion and the second portion is smaller than 0.15 wavelength of the lowest frequency of the operating bands of the antenna element. In other words, the total length of the antenna element of the invention is much smaller than the 0.25 wavelength required by a conventional antenna element, thereby allowing the antenna size to be decreased.
  • the invention provides a communication device, comprising: a ground element; and an antenna element, disposed adjacent to the ground element, and not overlapping with the ground element, wherein the antenna element comprises: a first portion, having a first end and a second end, wherein the first end is used as a first feeding point of the antenna element; and a second portion, having a third end and a fourth end, wherein the third end is used as a second feeding point of the antenna element, and the fourth end is open.
  • a first switch is coupled between the second end of the first portion and the third end of the second portion, and the first switch is further coupled through the first portion and a first reactive circuit to a communication module.
  • a second switch is coupled to the third end of the second portion, and the second switch is further coupled through a second reactive circuit to the communication module.
  • the antenna element substantially extends along a first edge of the ground element or along two adjacent edges of the ground element. In some embodiments, the antenna element is adjacent to a corner of the ground element.
  • the second portion substantially extends along a first edge of the ground element, and the first portion substantially extends along a second edge of the ground element. The first edge is adjacent and perpendicular to the second edge.
  • the antenna element When the first switch is closed and the second switch is open, the antenna element receives input energy through the first feeding point and operates in a first band. In some embodiments, when the second switch is closed and the first switch is open, the antenna element receives input energy through the second feeding point and operates in a second band. In some embodiments, the first band is approximately from 704MHz to 960MHz, and the second band is approximately from 1710MHz to 2690MHz.
  • the first portion of the antenna element substantially has an L-shape or a straight-line shape. In some embodiments, the second portion of the antenna element substantially has an L-shape or a straight-line shape.
  • the antenna element and the ground element form an asymmetry dipole antenna structure.
  • the different feeding points of the antenna element are selectively coupled to a signal source by controlling the switches.
  • the antenna element can use a combination of the first portion and the second portion or only the second portion to obtain different resonant current paths.
  • the antenna element can further control the different resonant modes to be excited. More particularly, the antenna element can operate in multiple bands as follows. When the first switch is closed and the second switch is open, the antenna element resonates by using the combination of the first portion and the second portion.
  • the first reactive circuit provides a first impedance value such that the antenna element resonates in the first band.
  • the total length of the first portion and the second portion is smaller than 0.15 wavelength of the lowest frequency of the first band.
  • the antenna element generates a resonant mode to cover a lower band thereof.
  • the antenna element resonates by using only the second portion.
  • the second reactive circuit provides a second impedance value such that the antenna element resonates in the second band.
  • the length of the second portion is smaller than 0.15 wavelength of the lowest frequency of the second band. In this case, the antenna element generates another resonant mode to cover a higher band thereof.
  • the antenna element substantially has a planar structure and has a total area of about 300mm 2 (10mm by 30mm).
  • the antenna element can switch between a lower band and a higher band.
  • the lower band can cover LTE700/GSM850/900 bands
  • the higher band can cover GSM1800/1900/UMTS/LTE2300/2500 bands.
  • the antenna element can cover the first band which is approximately from 704MHz to 960MHz and the second band which is approximately from 1710MHz to 2690MHz to achieve LTE/WWAN (Long Term Evolution / Wireless Wide Area Network) multi-band operations.
  • LTE/WWAN Long Term Evolution / Wireless Wide Area Network
  • FIG. 1 is a diagram for illustrating a communication device 100 according to a first embodiment of the invention.
  • the communication device 100 may be a smart phone, a tablet computer, or a notebook computer.
  • the communication device 100 at least comprises a ground element 10 and an antenna element 11.
  • the antenna element 11 substantially extends along a first edge 101 of the ground element 10.
  • the ground element 10 may be a metal plane disposed on a dielectric substrate (not shown), such as an FR4 substrate or a system circuit board.
  • the antenna element 11 is disposed adjacent to the ground element 10, and does not overlap with the ground element 10.
  • the antenna element 11 comprises a first portion 12 and a second portion 13.
  • the first portion 12 substantially has an L-shape
  • the second portion 13 substantially has a straight-line shape.
  • any of the first portion 12 and the second portion 13 may substantially have a straight-line shape, an L-shape, a J-shape, a U-shape, a W-shape, or an S-shape.
  • the first portion 12 has a first end 121 and a second end 122.
  • the first end 121 is used as a first feeding point of the antenna element 11.
  • the second portion 13 has a third end 131 and a fourth end 132.
  • the third end 131 is used as a second feeding point of the antenna element 11, and the fourth end 132 is open.
  • a first switch 14 is coupled between the second end 122 of the first portion 12 and the third end 131 of the second portion 13.
  • the first switch 14 is further coupled through the first portion 12 and a first reactive circuit 16 to a communication module 18.
  • a second switch 15 is coupled to the third end 131 of the second portion 13.
  • the second switch 15 is further coupled through a second reactive circuit 17 to the communication module 18.
  • the first reactive circuit 16 provides a first impedance value
  • the second reactive circuit 17 provides a second impedance value.
  • the first impedance value may be different from the second impedance value.
  • each of the first reactive circuit 16 and the second reactive circuit 17 comprises one or more inductors and capacitors, such as chip inductors and chip capacitors.
  • the communication module 18 is considered as a signal source of the antenna element 11.
  • the antenna element 11 selects the first feeding point or the second feeding point to receive input energy from the signal source to operate in different bands.
  • the types of the first switch 14 and the second switch 15 are not limitations of the invention.
  • each of the first switch 14 and the second switch 15 may be implemented using a PIN diode.
  • the communication device 100 further comprises a control unit (not shown). The control unit selectively closes and opens any of the first switch 14 and the second switch 15 according to a user input signal or a detection signal.
  • the communication device 100 further comprises a sensor (not shown). The sensor detects a frequency of an electromagnetic signal nearby and accordingly generates the detection signal.
  • the communication device 100 may further comprise other components, such as a touch panel, a processor, a speaker, a battery, and a housing (not shown).
  • FIG. 2 is a diagram for illustrating return loss of the antenna element 11 receiving input energy through the first feeding point (the first end 121 of the first portion 12) according to the first embodiment of the invention.
  • the total area of the ground element 10 is approximately equal to 15000mm 2 (100mm by 150mm) which is consistent with a typical size of a ground element of a tablet computer, and the total area of the antenna element 11 is merely approximately equal to 300mm 2 (10mm by 30mm).
  • the antenna element 11 resonates by using a combination of the first portion 12 and the second portion 13 to form a first band 21.
  • the first band 21 covers the LTE700/GSM850/900 bands (from about 704MHz to about 960MHz).
  • the total length of the first portion 12 and the second portion 13 is smaller than 0.15 wavelength of the lowest frequency in the first band 21.
  • FIG. 3 is a diagram for illustrating return loss of the antenna element 11 receiving input energy through the second feeding point (the third end 131 of the second portion 13) according to the first embodiment of the invention.
  • the antenna element 11 resonates by using only the second portion 13 to form a second band 31.
  • the second band 31 covers the GSM1800/1900/UMTS/LTE2300/2500 bands (from about 1710MHz to about 2690MHz).
  • the length of the second portion 13 is smaller than 0.15 wavelength of the lowest frequency in the second band 31.
  • FIG. 4 is a diagram for illustrating antenna efficiency of the antenna element 11 receiving input energy through the first feeding point according to the first embodiment of the invention.
  • the first switch 14 is closed and the second switch 15 is open.
  • the antenna efficiency curve 41 represents the antenna efficiency of the antenna element 11 operating in the LTE700/GSM850/900 bands. According to the results, it is understood that the antenna element 11 has good antenna efficiency (return losses included) in the LTE700/GSM850/900 bands and meets current application requirements.
  • FIG. 5 is a diagram for illustrating antenna efficiency of the antenna element 11 receiving input energy through the second feeding point according to the first embodiment of the invention.
  • the second switch 15 is closed and the first switch 14 is open.
  • the antenna efficiency curve 51 represents the antenna efficiency of the antenna element 11 operating in the GSM1800/1900/UMTS/LTE2300/2500 bands. According to the result, it is understood that the antenna element 11 has good antenna efficiency (return losses included) over GSM1800/1900/UMTS/LTE2300/2500 bands and meets current application requirements.
  • FIG. 6 is a diagram for illustrating a communication device 600 according to a second embodiment of the invention.
  • an antenna element 61 is disposed adjacent to a corner of the ground element 10, and substantially extends along two adjacent edges of the ground element 10 to save the internal design space of the communication device 600.
  • a first portion 62 of the antenna element 61 substantially has an L-shape
  • a second portion 63 of the antenna element 61 also substantially has an L-shape.
  • Other features of the second embodiment are similar to those of the first embodiment. Accordingly, the two embodiments can achieve similar performances.
  • FIG. 7 is a diagram for illustrating a communication device 700 according to a third embodiment of the invention.
  • an antenna element 71 is disposed adjacent to a corner of the ground element 10.
  • a second portion 73 of the antenna element 71 substantially extends along a first edge 101 of the ground element 10
  • a first portion 72 of the antenna element 71 substantially extends along a second edge 102 of the ground element 10 to save the internal design space of the communication device 700.
  • the first edge 101 is adjacent and perpendicular to the second edge 102.
  • the first portion 72 of the antenna element 71 substantially has a straight-line shape
  • the second portion 73 of the antenna element 61 also substantially has a straight-line shape.
  • Other features of the third embodiment are similar to those of the first embodiment. Accordingly, the two embodiments can achieve similar performances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Transceivers (AREA)
  • Details Of Aerials (AREA)

Claims (9)

  1. Kommunikationsvorrichtung (100), mit:
    einem Kommunikationsmodul (18);
    einem Erdungselement (10); und
    einem Antennenelement (11), das benachbart zum Erdungselement (10) angeordnet ist und das Erdungselement (10) nicht überlappt, wobei das Antennenelement (11) aufweist:
    einen ersten Abschnitt (12) mit einem ersten Ende (121) und einem zweiten Ende (122), wobei das erste Ende (121) als ein erster Einspeisepunkt des Antennenelements (11) verwendet wird; und
    einen zweiten Abschnitt (13) mit einem dritten Ende (131) und einem vierten Ende (132), wobei das dritte Ende (131) als ein zweiter Einspeisepunkt des Antennenelements (11) verwendet wird und das vierte Ende (132) offen ist,
    wobei ein erster Schalter (14) zwischen dem zweiten Ende (122) des ersten Abschnitts (12) und dem dritten Ende (131) des zweiten Abschnitts (13) geschaltet ist, wobei der erste Schalter (14) ferner über den ersten Abschnitt (12) und einen ersten Blindschaltkreis (16) mit dem Kommunikations-modul (8) verbunden ist, ein zweiter Schalter (15) mit dem dritten Ende (131) des zweiten Abschnitts (13) verbunden ist, und der zweite Schalter (15) ferner über einen zweiten Blindschaltkreis (17) mit dem Kommunikationsmodul (18) verbunden ist,
    wobei das erste Ende (121) über den ersten Blindschaltkreis (16) mit dem Kommunikationsmodul (18) verbunden ist,
    wobei, wenn der erste Schalter (14) geschlossen und der zweite Schalter (15) offen ist, das Antennenelement (11) Eingangsenergie über den ersten Einspeisepunkt empfängt und in einem ersten Band (21) arbeitet, und
    wobei die Gesamtlänge des ersten Abschnitts (12) und des zweiten Abschnitts (13) kleiner ist als das 0,15-fache der Wellenlänge der niedrigsten Frequenz im ersten Band (21).
  2. Kommunikationsvorrichtung nach Anspruch 1, wobei das Antennenelement (11) sich im Wesentlichen entlang eines ersten Rands (101) des Erdungselements (10) erstreckt.
  3. Kommunikationsvorrichtung nach Anspruch 1, wobei das Antennenelement (11) in der Nähe einer Ecke des Erdungselements (10) angeordnet ist, der zweite Abschnitt (13) sich im Wesentlichen entlang eines ersten Rands (101) des Erdungselements (10) erstreckt, der erste Abschnitt (12) sich im Wesentlichen entlang eines zweiten Rands (102) des Erdungselements (10) erstreckt, und der erste Rand (101) benachbart und senkrecht zum zweiten Rand (102) angeordnet ist.
  4. Kommunikationsvorrichtung nach Anspruch 1, wobei, wenn der zweite Schalter (15) geschlossen und der erste Schalter (14) offen ist, das Antennenelement (11) Eingangsenergie über den zweiten Einspeisepunkt empfängt und in einem zweiten Band (31) arbeitet.
  5. Kommunikationsvorrichtung nach Anspruch 4, wobei das erste Band (21) sich ungefähr von 704 MHz bis 960 MHz erstreckt und das zweite Band (31) sich ungefähr von 1710 MHz bis 2690 MHz erstreckt.
  6. Kommunikationsvorrichtung nach Anspruch 4, wobei eine Länge des zweiten Abschnitts kleiner ist als das 0,15-fache der Wellenlänge der niedrigsten Frequenz im zweiten Band (31).
  7. Kommunikationsvorrichtung nach Anspruch 1, wobei der erste Abschnitt (12) im Wesentlichen eine L-Form oder eine geradlinige Form hat.
  8. Kommunikationsvorrichtung nach Anspruch 1, wobei der zweite Abschnitt (13) im Wesentlichen eine L-Form oder eine geradlinige Form hat.
  9. Kommunikationsvorrichtung nach Anspruch 1, wobei das Antennenelement (11) sich im Wesentlichen entlang zweier benachbarter Ränder des Erdungselements (10) erstreckt.
EP13168114.0A 2013-03-08 2013-05-16 Kommunikationsvorrichtung und Antennenelement darin Active EP2775562B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW102108180A TWI511371B (zh) 2013-03-08 2013-03-08 通訊裝置

Publications (2)

Publication Number Publication Date
EP2775562A1 EP2775562A1 (de) 2014-09-10
EP2775562B1 true EP2775562B1 (de) 2017-02-08

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Application Number Title Priority Date Filing Date
EP13168114.0A Active EP2775562B1 (de) 2013-03-08 2013-05-16 Kommunikationsvorrichtung und Antennenelement darin

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EP (1) EP2775562B1 (de)
TW (1) TWI511371B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108321495B (zh) * 2018-01-22 2020-05-19 Oppo广东移动通信有限公司 天线组件、天线装置及电子设备

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE516531C2 (sv) * 1999-10-29 2002-01-29 Allgon Ab Antennanordning omkopplingsbar mellan ett flertal konfigurationstillstånd i avhängighet av en mottagen storhet samt därtill hörande metod
CN100373694C (zh) * 2004-02-23 2008-03-05 启碁科技股份有限公司 可调整的无线通讯装置及其控制方法
TWI353688B (en) * 2008-06-10 2011-12-01 Univ Nat Sun Yat Sen A multiband mobile communication device antenna
TW201004030A (en) * 2008-07-08 2010-01-16 Mitac Int Corp Antenna system capable of adjusting radiation pattern
WO2010120218A1 (en) * 2009-04-15 2010-10-21 Laird Technologies Ab Multiband antenna device and portable radio communication device comprising such an antenna device
GB2472779B (en) * 2009-08-17 2013-08-14 Microsoft Corp Antennas with multiple feed circuits
KR101687632B1 (ko) * 2010-05-10 2016-12-20 삼성전자주식회사 휴대용 단말기의 가변형 내장 안테나 장치
JP2012256999A (ja) * 2011-06-08 2012-12-27 Panasonic Corp アンテナ装置

Non-Patent Citations (1)

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Title
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Publication number Publication date
EP2775562A1 (de) 2014-09-10
TWI511371B (zh) 2015-12-01
TW201436358A (zh) 2014-09-16

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