WO2011007577A1 - アンテナ装置 - Google Patents
アンテナ装置 Download PDFInfo
- Publication number
- WO2011007577A1 WO2011007577A1 PCT/JP2010/004614 JP2010004614W WO2011007577A1 WO 2011007577 A1 WO2011007577 A1 WO 2011007577A1 JP 2010004614 W JP2010004614 W JP 2010004614W WO 2011007577 A1 WO2011007577 A1 WO 2011007577A1
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- WO
- WIPO (PCT)
- Prior art keywords
- housing
- antenna
- ground plate
- feeding unit
- power
- Prior art date
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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
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Definitions
- the present invention relates to an antenna device.
- a 3G-LTE system or the like requires a MIMO (Multiple Input Multiple Output) antenna, and it is required to suppress the correlation characteristic of radiation directivity at each antenna of the MIMO antenna.
- MIMO Multiple Input Multiple Output
- Patent Document 1 describes an antenna device as shown in FIG.
- This antenna apparatus includes an antenna element and at least two waveguide assemblies (ground) that are respectively connected to connection points of the antenna element via a plurality of supply devices and are insulated from each other with respect to electromagnetic oscillation.
- Each of the waveguide assemblies consists of a conductor portion coupled to a supply device, and the waveguide assembly is designed to absorb or radiate electromagnetic oscillations through the supply device. Also, the conductor portion is designed to absorb or radiate electromagnetic oscillation in the same way that the antenna element operates.
- the present invention has been made in view of the above points, and an object of the present invention is to provide an antenna device that improves antenna gain and reduces correlation in a MIMO antenna.
- An antenna device is a foldable portable terminal that includes a first housing and a second housing, and includes a hinge portion that rotatably connects the first housing and the second housing.
- An antenna device to be mounted the first ground plate built in the first housing, the second ground plate built in the second housing, and a desired frequency provided in the vicinity of the hinge portion. Are connected to the first ground plate, fed from the other end of the antenna element, connected to the second ground plate, and connected to the second ground plate.
- a second power feeding unit that feeds power from the other end.
- the present invention it is possible to improve the antenna gain and reduce the correlation in the MIMO antenna.
- the figure which shows the antenna apparatus of patent document 1 The figure which shows the structure of the portable terminal which concerns on Embodiment 1 of this invention.
- the figure which shows a mode that the three-dimensional coordinate system was provided
- the figure which shows the frequency characteristic of VSWR The figure which shows the radiation directivity (horizontal polarization component) of XZ plane Diagram showing horizontal polarization phase characteristics
- route of the antenna electric current in the structure (structure2) shown in FIG. The figure which shows the measurement result of S parameter (structure-) in structure1 and structure2
- route of the antenna current in the structure (structure3) shown in FIG. The figure which shows the measurement result of S parameter (s-parameter) in structures 1-3
- the figure which shows the structure of the portable terminal when not using a coaxial cable The figure which shows the structure of the portable terminal in which a 1st ground board and a 2nd ground board differ in size.
- FIG. 2 is a diagram showing a configuration of the mobile terminal according to Embodiment 1 of the present invention.
- the portable terminal shown in this figure has a folded shape, and the first housing 101 and the second housing 102 are rotatably connected by a hinge portion 202.
- a first ground plate 103 is built in the first housing 101, and a second ground plate 104 is built in the second housing 102, and the first ground plate 103 and the second ground plate 104 are Are connected by a data communication line 112.
- the first ground plate 103 includes a radio circuit 105 and a signal processing unit 106 connected to the radio circuit 105.
- a first power feeding unit 107 connected to the wireless circuit unit 105 and having a transmission / reception function is disposed.
- a second power feeding unit 108 that is connected to the radio circuit 105 via the coaxial cable 109 and has a transmission / reception function is disposed.
- One end of the first strip element 110 is connected to the first feeding unit 107, and the other end of the first strip element 110 is connected to the antenna element 201 provided in the vicinity of the hinge part 202 in the first housing 101. Yes. Further, one end of the second strip element 111 is connected to the second power feeding unit 108, and the other end of the second strip element 111 is connected to the antenna element 201.
- the antenna element 201 has one end connected to the first strip element 110 and the second strip element 111, and the other end opened.
- the width of the first ground plate 103 and the second ground plate 104 are 45 mm, the length is 100 mm, the length of the antenna element 201 is 25 mm, and the length of the strip element between the feeding points is 30 mm. And so on.
- FIG. 3 shows a state in which a three-dimensional coordinate system is provided.
- the horizontal direction of the mobile terminal is taken as the X axis
- the length direction is taken as the Y axis
- the width direction is taken as the Z axis.
- An angle formed with respect to the XZ plane is ⁇
- an angle formed with respect to the YZ plane is ⁇ .
- FIG. 4 is a diagram showing the frequency characteristics of VSWR.
- the thick solid line indicates the frequency characteristic of VSWR when the first power supply unit 107 is excited
- the dotted line indicates the frequency characteristic of VSWR when the second power supply unit 108 is excited.
- the thick solid line and the dotted line overlap each other, and the resonance centered on the same 2 GHz can be obtained even when excitation is performed from both power feeding units.
- FIG. 5 shows the horizontal polarization component of the radiation directivity (radiation directivity) of the mobile terminal in the XZ plane in FIG. 5A shows the radiation directivity when the first power feeding unit 107 is excited, and FIG. 5B shows the radiation directivity when the second power feeding unit 108 is excited.
- the radiation directivity is symmetrical, and the correlation characteristic of the radiation directivity can be kept low.
- FIG. 6 is a diagram showing phase characteristics.
- FIG. 6 shows the phase of the XZ plane in FIG.
- the thick solid line indicates the phase of horizontal polarization when the first power feeding unit 107 is excited
- the dotted line indicates the phase of horizontal polarization when the second power feeding unit 108 is excited.
- the correlation coefficient (Correlation Coefficient: CC) obtained by using the Pearson product-moment correlation shown in the following formula (1) is as low as 0.3 in the horizontal polarization component. Results were obtained. That is, it is possible to realize a low correlation of the antenna directivity radiated from each power feeding unit.
- the first housing is provided with the first power feeding unit
- the second housing is provided with the second power feeding unit
- the first housing and the second housing are provided.
- An antenna element is arranged in the vicinity of a hinge portion that rotatably connects the housing, and the first feeding portion and the second feeding portion are each connected to one end of the antenna element, so that a plurality of antennas are connected to one antenna element. The effect can be realized, the antenna gain can be improved, and the low correlation of the antenna directivity can be realized.
- FIG. 7 is a diagram showing the configuration of the mobile terminal according to Embodiment 2 of the present invention. 7 is different from FIG. 2 in that a housing state sensor 114 and a switching circuit 115 are added.
- the housing state sensor 114 detects whether the foldable portable terminal is in an open state or a closed state, and notifies the switching circuit 115 via the signal processing unit 106 and the wireless circuit 105.
- the switching circuit 115 switches whether to connect the wireless circuit 105 and the second power feeding unit 108, that is, on / off of the second power feeding unit, according to the detection result output from the housing state sensor 114. Specifically, when the detection result output from the housing state sensor 114 indicates the open state of the portable terminal, the switching circuit 115 connects the wireless circuit 105 and the second power feeding unit 108 and the detection result is portable. When the terminal is closed, the switching circuit 115 cuts off the connection between the wireless circuit 105 and the second power feeding unit 108.
- the antenna gain deteriorates due to the positional relationship between the first ground plate 103 and the second ground plate 104.
- the switching circuit cuts off the connection between the wireless circuit and the second power feeding unit and stops the power feeding from the second power feeding unit. As a result, it is possible to prevent antenna gain deterioration.
- the switching circuit 115 is controlled based on the result of the case state sensor 114 detecting the open / closed state of the mobile terminal.
- the signal processing unit 106 includes a reception power detection circuit, and when the reception power detected by the reception power detection circuit falls below a predetermined value, the switching circuit 115 switches between the radio circuit 105 and the second power feeding unit 108. The connection may be blocked.
- FIG. 9 is a diagram showing the configuration of the mobile terminal according to Embodiment 3 of the present invention. 9 differs from FIG. 2 in that the antenna element 201 is changed to an antenna element 301. FIG. However, FIG. 9 shows only the vicinity of the hinge portion 202 of the portable terminal.
- the antenna element 301 has a length of ⁇ / 4, is disposed perpendicular to the surface of the ground plate (the first ground plate 103 or the second ground plate 104), and has one end connected to the first strip element 110 and the second strip. It is connected to the strip element 111 and the other end is open.
- the antenna element 301 arranged in this manner functions as an open stub at a desired frequency. Thereby, the isolation performance between the 1st electric power feeding part 107 and the 2nd electric power feeding part 108 is securable in a desired frequency.
- FIG. 10 shows a path of the antenna current in the configuration (structure 1) shown in FIG.
- FIG. 10A shows the path of the antenna current when the first feeding unit 107 is excited in structure1. At this time, leakage of the antenna current occurs not only to the antenna element 201 but also to the first strip element 110.
- FIG. 10B shows the path of the antenna current when the second feeding unit 108 is excited in structure1. As shown in FIG. 10B, at this time, leakage of the antenna current not only to the antenna element 201 but also to the second strip element 111 occurs.
- FIG. 11A shows the path of the antenna current when the first feeding unit 107 is excited in structure2. At this time, an antenna current flows through the antenna element 301, and leakage of the antenna current to the first strip element 110 hardly occurs.
- FIG. 11B shows the path of the antenna current when the second feeding unit 108 is excited in structure2. As shown in FIG. 11B, at this time, an antenna current flows through the antenna element 301, and leakage of the antenna current to the second strip element 111 hardly occurs. This is because the antenna current becomes zero at the tip of the antenna element 301 and no reflected current is generated.
- the desired frequency is set to 2 GHz, and the measurement results of S-parameters in structure 1 and structure 2 are shown in FIG.
- S11 resonates below ⁇ 10 dB at 2 GHz, but the isolation characteristic (S21) between the power feeding units does not fall below ⁇ 10 dB at 2 GHz, and it can be confirmed that both are not compatible at a desired frequency.
- structure 2 it can be confirmed that the resonance frequency ratio band is improved compared to structure 1, and that the isolation characteristic (S21) between the power feeding units is lower than ⁇ 10 dB, and both are compatible at a desired frequency.
- the isolation performance between the first power supply unit 107 and the second power supply unit 108 can be ensured at a desired frequency, the electrical connection between the first power supply unit 107 and the second power supply unit 108 can be ensured. Interference can be suppressed, and the radiation gain characteristics at the time of excitation of the first feeding unit 107 and the second feeding unit 108 can be improved. Furthermore, the leakage of the transmission current of each other can also be suppressed for the radio circuit performance connected to the first power feeding unit 107 and the second power feeding unit 108, respectively.
- the third embodiment has a length of ⁇ / 4, is disposed perpendicular to the surface of the ground plate, has the first strip element and the second strip element connected to one end, and others.
- the antenna element is perpendicular to the long side of the ground plate (the first ground plate 103 or the second ground plate 104), and on the same surface as the ground plate, the first housing 101 (or It is arranged so as to protrude from the second housing 102 (+ X direction in the coordinate axis shown in FIG. 3), and one end is connected to the first strip element 110 and the second strip element 111 and the other end is opened. Good.
- FIG. 14 shows a path of the antenna current in the configuration (structure 3) shown in FIG.
- FIG. 14A shows the path of the antenna current when the first feeding unit 107 is excited in structure3. At this time, an antenna current flows through the antenna element, and no antenna current flows through the first strip element 110.
- FIG. 14B shows the path of the antenna current when the second feeding unit 108 is excited in structure3. As shown in FIG. 14B, at this time, an antenna current flows through the antenna element, and no antenna current flows through the second strip element 111.
- the antenna element functions as an open stub at a desired frequency.
- the isolation performance between the 1st electric power feeding part 107 and the 2nd electric power feeding part 108 is securable in a desired frequency.
- FIG. 15 shows the S-parameter measurement results in structure3. As can be seen from the figure, also in structure 3, it is confirmed that the resonance frequency ratio band is improved over structure 1, and that the isolation characteristic (S21) between the power feeding parts is lower than -10 dB, and both are compatible with the desired frequency. it can.
- the radio circuit 105 in the first housing and the second power feeding unit are connected by a coaxial cable.
- the wireless circuit 113 connected to the signal processing unit 106 may be provided on the second ground plate, and the wireless circuit 113 may be connected to the second power feeding unit.
- the first ground plate 103 and the second ground plate 104 are described as having the same size.
- the present invention is not limited to this, and the first ground plate 103 is the second ground plate. It may be larger or smaller than the plate 104.
- FIG. 17 shows a case where the first ground plate 103 is larger than the second ground plate 104.
- the metal housing is connected to the first ground plate or the second ground plate. By doing so, the size of the ground may be changed.
- the antenna element 201 is described as being provided in the first housing 101. However, the antenna element 201 may be provided in the second housing 102 as long as it is in the vicinity of the hinge portion 202.
- the antenna element 201 and the antenna element 301 described above can also be applied to metal parts (for example, hinge metal of a folding terminal) having substantially the same length as the assumed antenna element when mounted on a mobile terminal.
- the antenna device according to the present invention can be applied to a wireless communication terminal device such as a folding cellular phone.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Telephone Set Structure (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
図2は、本発明の実施の形態1に係る携帯端末の構成を示す図である。この図に示す携帯端末は折り畳み形状を有し、第1筐体101と第2筐体102とがヒンジ部202によって回動自在に接続されている。
図7は、本発明の実施の形態2に係る携帯端末の構成を示す図である。図7が図2と異なる点は、筐体状態センサ114及び切替回路115を追加した点である。
図9は、本発明の実施の形態3に係る携帯端末の構成を示す図である。図9が図2と異なる点は、アンテナエレメント201をアンテナエレメント301に変更した点である。ただし、図9は携帯端末のヒンジ部202近傍のみを示す。
102 第2筐体
103 第1グランド板
104 第2グランド板
105、113 無線回路
106 信号処理部
107 第1給電部
108 第2給電部
109 同軸ケーブル
110 第1ストリップ素子
111 第2ストリップ素子
112 データ通信用ライン
114 筐体状態センサ
115 切替回路
201、301 アンテナエレメント
202 ヒンジ部
Claims (5)
- 第1筐体と第2筐体とを備え、前記第1筐体と前記第2筐体とを回動自在に接続したヒンジ部によって構成される折り畳み式携帯端末に搭載されるアンテナ装置であって、
前記第1筐体に内蔵された第1グランド板と、
前記第2筐体に内蔵された第2グランド板と、
前記ヒンジ部近傍に設けられ、所望の周波数に共振し、一端が開放されたアンテナエレメントと、
前記第1グランド板に接続され、前記アンテナエレメントの他端から給電する第1給電部と、
前記第2グランド板に接続され、前記アンテナエレメントの他端から給電する第2給電部と、
を具備するアンテナ装置。 - 前記折り畳み式携帯端末が開状態にあるか閉状態にあるかを検知する筐体状態検知手段と、
前記筐体状態検知手段の検知結果に応じて、前記第2給電部のオンオフを制御する切替手段と、
を具備する請求項1に記載のアンテナ装置。 - 受信信号の受信電力を検出する受信電力検出手段を具備し、
前記切替手段は、前記受信電力に応じて、前記第2給電部のオンオフを制御する請求項2に記載のアンテナ装置。 - 前記アンテナエレメントは、1/4波長の長さを有し、前記第1グランド板又は前記第2グランド板の面に対して垂直に配置され、一端が開放された請求項1に記載のアンテナ装置。
- 前記アンテナエレメントは、1/4波長の長さを有し、前記第1グランド板又は前記第2グランド板の長辺に対して垂直、かつ、グランド板と同一面において前記第1筐体又は前記第2筐体から突出するように配置され、一端が開放された請求項1に記載のアンテナ装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/383,386 US20120112972A1 (en) | 2009-07-16 | 2010-07-15 | Antenna device |
CN2010800289543A CN102473999A (zh) | 2009-07-16 | 2010-07-15 | 天线装置 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009168139 | 2009-07-16 | ||
JP2009-168139 | 2009-07-16 | ||
JP2010154865A JP2011041261A (ja) | 2009-07-16 | 2010-07-07 | アンテナ装置 |
JP2010-154865 | 2010-07-07 |
Publications (1)
Publication Number | Publication Date |
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WO2011007577A1 true WO2011007577A1 (ja) | 2011-01-20 |
Family
ID=43449188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/004614 WO2011007577A1 (ja) | 2009-07-16 | 2010-07-15 | アンテナ装置 |
Country Status (4)
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US (1) | US20120112972A1 (ja) |
JP (1) | JP2011041261A (ja) |
CN (1) | CN102473999A (ja) |
WO (1) | WO2011007577A1 (ja) |
Cited By (1)
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CN103326103A (zh) * | 2012-03-23 | 2013-09-25 | 联想(北京)有限公司 | 具有内嵌式天线的电子设备 |
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JP5473159B2 (ja) * | 2011-07-29 | 2014-04-16 | 東芝テック株式会社 | アンテナ装置 |
US11764749B2 (en) | 2016-08-29 | 2023-09-19 | Silicon Laboratories Inc. | Apparatus with partitioned radio frequency antenna and matching network and associated methods |
US11894622B2 (en) | 2016-08-29 | 2024-02-06 | Silicon Laboratories Inc. | Antenna structure with double-slotted loop and associated methods |
US11764473B2 (en) | 2016-08-29 | 2023-09-19 | Silicon Laboratories Inc. | Apparatus with partitioned radio frequency antenna and matching network and associated methods |
US11749893B2 (en) | 2016-08-29 | 2023-09-05 | Silicon Laboratories Inc. | Apparatus for antenna impedance-matching and associated methods |
US11769949B2 (en) | 2016-08-29 | 2023-09-26 | Silicon Laboratories Inc. | Apparatus with partitioned radio frequency antenna and matching network and associated methods |
CN109494477B (zh) | 2017-09-12 | 2022-01-07 | 中兴通讯股份有限公司 | 设备天线及可折叠设备 |
US11894826B2 (en) | 2017-12-18 | 2024-02-06 | Silicon Laboratories Inc. | Radio-frequency apparatus with multi-band balun and associated methods |
US11750167B2 (en) | 2017-11-27 | 2023-09-05 | Silicon Laboratories Inc. | Apparatus for radio-frequency matching networks and associated methods |
US11894621B2 (en) | 2017-12-18 | 2024-02-06 | Silicon Laboratories Inc. | Radio-frequency apparatus with multi-band balun with improved performance and associated methods |
US11916514B2 (en) | 2017-11-27 | 2024-02-27 | Silicon Laboratories Inc. | Radio-frequency apparatus with multi-band wideband balun and associated methods |
KR102483631B1 (ko) * | 2018-06-11 | 2023-01-03 | 삼성전자주식회사 | 안테나를 포함하는 전자 장치 |
CN108879072B (zh) * | 2018-07-10 | 2021-02-09 | Oppo广东移动通信有限公司 | 电子设备 |
CN109524760B (zh) * | 2018-09-30 | 2021-03-12 | 维沃移动通信有限公司 | 一种终端设备 |
CN109725680B (zh) * | 2018-12-25 | 2021-12-10 | 维沃移动通信有限公司 | 一种移动终端及天线控制方法 |
CN110099151A (zh) * | 2019-05-27 | 2019-08-06 | 维沃移动通信有限公司 | 一种天线控制方法及移动终端 |
US11862872B2 (en) | 2021-09-30 | 2024-01-02 | Silicon Laboratories Inc. | Apparatus for antenna optimization and associated methods |
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Also Published As
Publication number | Publication date |
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JP2011041261A (ja) | 2011-02-24 |
CN102473999A (zh) | 2012-05-23 |
US20120112972A1 (en) | 2012-05-10 |
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