WO2008001899A1 - Dispositif d'antenne - Google Patents
Dispositif d'antenne Download PDFInfo
- Publication number
- WO2008001899A1 WO2008001899A1 PCT/JP2007/063142 JP2007063142W WO2008001899A1 WO 2008001899 A1 WO2008001899 A1 WO 2008001899A1 JP 2007063142 W JP2007063142 W JP 2007063142W WO 2008001899 A1 WO2008001899 A1 WO 2008001899A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ground
- substrate
- antenna
- ground conductor
- conductor
- Prior art date
Links
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
- H01Q1/12—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q9/40—Element having extended radiating surface
Definitions
- the present invention relates to an antenna device suitable for miniaturization of a wireless communication device.
- an antenna device disclosed in Japanese Patent No. 3758495 has been proposed.
- a spiral conductor layer is formed on the surface of a substrate made of a dielectric or magnetic material.
- a so-called chip antenna is installed on a substrate, and the chip antenna is grounded on a ground surface formed on the substrate.
- the RF ground conductor 3 to which the chip antenna 2 on the substrate 1 is grounded ideally has a large area on the substrate 1 in order to obtain sufficient antenna characteristics. I need.
- a circuit ground conductor 4 serving as a digital circuit ground is provided together with an RF ground conductor 3 to which a chip antenna 2 is grounded. It is also considered that the RF ground conductor 3 and the circuit ground conductor 4 are formed on the substrate 1 and coexist on the same substrate 1.
- Patent Document 1 Japanese Patent No. 3758495 (Fig. 6)
- the size (particularly the length) of the ground plane on which the antenna is grounded is important.
- the high density of component mounting it is becoming difficult to secure the ground area necessary to obtain antenna characteristics in an ideal state as shown in Fig. 5.
- FIG. 6 when the RF ground conductor 3 and the circuit ground conductor 4 coexist on the same substrate 1, the ground plane on the substrate 1 is divided and the RF ground conductor 3 is required. There was an inconvenience that a necessary area could not be secured.
- the present invention has been made in view of the above-described problems, and can obtain the same antenna characteristics as when an RF ground conductor is widely formed on a substrate.
- An object of the present invention is to provide an antenna device that can coexist with each other.
- the present invention employs the following configuration in order to solve the above-described problems.
- the antenna device of the present invention is branched and extended in at least two directions, and at least a part is formed on the surface of the substrate, and an RF ground conductor serving as an antenna ground ground and one end connected to the RF ground conductor.
- An antenna portion is formed on the surface of the substrate, and an RF ground conductor serving as an antenna ground ground and one end connected to the RF ground conductor.
- the RF ground conductor force branches in at least two directions and extends to V, so that the total ground area is small, but the length required for antenna characteristics is secured by extending in two directions.
- radiation efficiency similar to that of one large-area ground can be obtained, and sufficient antenna characteristics can be obtained.
- the RF ground conductor is formed in an inverted L shape branched in directions orthogonal to each other. Since this antenna device has an RF ground conductor branched in an inverted L shape, when a rectangular substrate is used, the RF ground conductor is arranged along the short side and the long side of the substrate. The substrate surface can be used effectively. In addition, since the RF ground conductors are branched in directions orthogonal to each other, it is possible to contribute to antenna characteristics in all directions.
- the antenna unit is a chip antenna installed on the substrate, and the RF ground conductor is a first ground unit extending along the chip antenna. And a second ground part extending on the substrate in a direction orthogonal to the extending direction of the first ground part and in a direction away from the chip antenna force from the first ground.
- an RF ground conductor is composed of a first ground part along the chip antenna and a second ground part perpendicular to the chip antenna. Therefore, the chip is arranged according to the above arrangement relationship. Since the antenna is arranged, good antenna characteristics can be obtained even in a small space.
- the RF ground conductor has a substrate ground portion formed on the substrate and a base end connected to the substrate ground portion in a direction different from the substrate ground portion. And an external ground portion extending to the outside of the substrate.
- the RF ground conductor is composed of the substrate ground portion and the external ground portion, if a sufficient ground plane cannot be obtained on the substrate surface, the external ground portion such as a metal wire outside the substrate can be obtained. The ground length is ensured by using, and good antenna characteristics can be obtained.
- a circuit ground conductor serving as a digital circuit ground is formed on the surface of the substrate.
- the circuit ground conductor is formed on the substrate together with the RF ground conductor, it is possible to secure a sufficient area of the circuit ground conductor while maintaining the antenna characteristics.
- the RF ground conductor force branches and extends in at least two directions, so that the radiation efficiency similar to that in the case of one large-area ground can be obtained. It is possible to have sufficient antenna characteristics. Therefore, sufficient antenna characteristics can be obtained even when a circuit ground conductor, which is a digital circuit ground, coexists with an RF ground conductor on the same substrate, resulting in a high component mounting area and a small wireless communication device. Can be realized.
- FIG. 1 is a plan view showing an antenna device according to a first embodiment of the present invention.
- FIG. 2 is a circuit diagram showing a frequency adjustment circuit in the first embodiment.
- FIG. 3 is a plan view showing another example of the antenna device in the first embodiment.
- FIG. 4 is a plan view showing an antenna apparatus according to a second embodiment of the present invention.
- FIG. 5 is a plan view showing an ideal antenna apparatus.
- FIG. 6 is a plan view showing a conventional antenna apparatus according to the present invention.
- FIGS. 1 to 3 a first embodiment of an antenna device according to the present invention will be described with reference to FIGS. 1 to 3.
- the antenna device 1 of this embodiment includes a rectangular substrate 1, an RF ground conductor 13, a chip antenna (antenna unit) 2, and a circuit ground conductor 4.
- the substrate 1 is made of an insulating material such as resin.
- the RF ground conductor 13 is formed on the surface of the substrate 1 and functions as an antenna ground ground.
- One end of the chip antenna 2 is connected to the RF ground conductor 13.
- the circuit ground conductor 4 is formed on the surface of the substrate 1 and functions as a digital circuit ground.
- the chip antenna 2 is an antenna element that functions as a loading element.
- This chip antenna 2 is installed at a position close to one of the short sides of the substrate 1 and separated from the RF ground conductor 13 by a predetermined distance, and is on a land (not shown) formed at a predetermined position on the substrate 1. It is fixed to.
- the chip antenna 2 is connected via an RF ground conductor 13 and a connecting conductor 14. Note that one end of the conductor pattern of the chip antenna 2 is connected to the connecting conductor 14.
- a frequency adjustment circuit 15 is connected to the connecting conductor 14.
- the frequency adjustment circuit 15 includes a first inductor 16 and a second inductor 17 which are chip inductors connected in series to the chip antenna 2, one end connected to the second inductor 17, and the other end connected to the RF ground conductor 13. And a third inductor 18 which is a chip inductor.
- a feeding point is provided between the second inductor 17 and the third inductor 18.
- the first inductor 16 and the second inductor 17 are for adjusting the resonance frequency
- the third inductor 18 is provided for reducing the reflection of incident power.
- the RF ground conductor 13 is patterned on, for example, a copper foil on the substrate 1, and is connected to the ground of a high-frequency circuit (not shown).
- the RF ground conductor 13 has a first ground portion 19A and a second ground portion 19B.
- the first ground part 19A Extending along the chip antenna 2.
- the second ground portion 19B extends in a direction orthogonal to the extending direction of the first ground portion 19A and in a direction away from the chip antenna 2 from the first ground portion 19A. That is, the RF ground conductor 13 is formed in an inverted L shape that branches and extends in two directions perpendicular to each other.
- the second ground portion 19B is arranged along the circuit ground conductor 4 on the connecting conductor 14 side (left side of the circuit ground conductor 4 in the figure).
- the RF ground conductor 13 branches and extends in two directions as the first ground portion 19A and the second ground portion 19B, so that the entire ground area is small.
- the length required for antenna characteristics is secured by extending in the direction.
- radiation efficiency similar to that of one large-area ground can be obtained, and sufficient antenna characteristics can be obtained.
- the RF ground conductor 13 branched in two directions is in a bipole antenna state when combined with the chip antenna 2 serving as the antenna section. Therefore, the length close to the antenna operating wavelength of 1Z4 is configured as the electrical length, and it is estimated that the antenna characteristics are improved.
- the antenna device of the present embodiment has the RF ground conductor 13 branched in an inverted L shape, the first ground portion 19A and the second ground portion 19A are arranged along the short side and the long side of the substrate 1. By disposing each round portion 19B, the surface of the substrate 1 can be used effectively.
- the circuit ground conductor 4 is formed on the substrate 1 together with the RF ground conductor 13, a sufficient area of the circuit ground conductor 4 can be secured while maintaining the antenna characteristics.
- the RF ground conductors 13 are branched in directions orthogonal to each other, it is possible to contribute to antenna characteristics in all directions.
- the second ground portion 19B is disposed along the circuit ground conductor 4 on the side opposite to the connection conductor 14 (in the figure, the circuit ground conductor 4 On the right side).
- the difference between the second embodiment and the first embodiment is that in the first embodiment, the RF ground conduction is different. While the first ground portion 19A and the second ground portion 19B constituting the body 13 are both formed on the substrate 1, the antenna device of the second embodiment has an RF ground as shown in FIG.
- the conductor 23 has a substrate ground portion 29A formed on the substrate 1, and an external ground portion connected to the substrate ground portion 29A and connected to the substrate ground portion 29A in a direction different from the substrate ground portion 29A and extending to the outside of the substrate 1. It is composed of 29B.
- the RF ground conductor 23 is constituted by the external ground portion 29B extending along the conductor 4 in a direction orthogonal to the extending direction of the substrate ground portion 29A.
- the external ground portion 29B a flexible substrate on which a conductor is formed, a metal wire, a metal adhesive tape, or the like is employed.
- the circuit ground conductor 4 is secured on the surface of the substrate 1 in order to secure the circuit ground conductor 4 If a sufficient ground plane cannot be obtained, the ground length can be secured by using the external ground portion 29B outside the substrate 1, and good antenna characteristics can be obtained.
- the adjustment circuit constants of the first inductor 16 to the third inductor 18 in the frequency adjustment circuit 15 are A, B, and C, respectively.
- FR-4 having a relative dielectric constant of 4.9 is used for the substrate 1 and an alumina element having a relative dielectric constant of 9 is used for the chip antenna 2, and the conductor pattern and each conductor on the surface of the substrate 1 Is a perfect conductor.
- Evaluation results obtained by confirming the effect by the simulation tool based on the above calculation conditions for the first embodiment (present invention 1) and other examples of the first embodiment (present invention 2) are as follows. Table 1 shows. Table 1 also shows the simulation results for the ideal configuration shown in Fig. 5 (ideal example) and the conventional configuration shown in Fig. 6 (conventional example).
- the present invention 1 and the present invention 2 both have improved antenna characteristics as compared with the conventional example, and have confirmed substantially the same effect as the ideal example.
- a ferromagnet using alumina as a dielectric material or a composite material having both a dielectric and a magnetic material may be used as the element body of the chip antenna 2.
- the RF ground conductors 13 and 23 may be branched and extended in three or more directions by branching and extending in two directions.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES07767927T ES2425369T3 (es) | 2006-06-29 | 2007-06-29 | Dispositivo de antena |
KR1020087031720A KR101367586B1 (ko) | 2006-06-29 | 2007-06-29 | 안테나 장치 |
US12/306,614 US7982682B2 (en) | 2006-06-29 | 2007-06-29 | Antenna apparatus |
EP07767927.2A EP2040328B1 (en) | 2006-06-29 | 2007-06-29 | Antenna device |
CN2007800242013A CN101479879B (zh) | 2006-06-29 | 2007-06-29 | 天线装置 |
HK09106890.9A HK1128832A1 (en) | 2006-06-29 | 2009-07-27 | Antenna device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006180513A JP4688068B2 (ja) | 2006-06-29 | 2006-06-29 | アンテナ装置 |
JP2006-180513 | 2006-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008001899A1 true WO2008001899A1 (fr) | 2008-01-03 |
Family
ID=38845662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/063142 WO2008001899A1 (fr) | 2006-06-29 | 2007-06-29 | Dispositif d'antenne |
Country Status (9)
Country | Link |
---|---|
US (1) | US7982682B2 (ja) |
EP (1) | EP2040328B1 (ja) |
JP (1) | JP4688068B2 (ja) |
KR (1) | KR101367586B1 (ja) |
CN (1) | CN101479879B (ja) |
ES (1) | ES2425369T3 (ja) |
HK (1) | HK1128832A1 (ja) |
TW (1) | TWI440251B (ja) |
WO (1) | WO2008001899A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012039582A (ja) * | 2010-08-12 | 2012-02-23 | Casio Comput Co Ltd | マルチバンドアンテナ及び電子機器 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2168205A4 (en) * | 2007-07-18 | 2012-06-06 | Nokia Corp | ANTENNA ARRANGEMENT |
FI20085304A0 (fi) | 2008-04-11 | 2008-04-11 | Polar Electro Oy | Resonaattorirakenne pienikokoisissa radiolaitteissa |
JP5368730B2 (ja) | 2008-05-13 | 2013-12-18 | 三菱電線工業株式会社 | アンテナ装置 |
WO2014021977A1 (en) | 2012-07-30 | 2014-02-06 | Utc Fire & Security Americas Corporation, Inc. | Ism band antenna structure for security system |
JP6181507B2 (ja) * | 2012-10-24 | 2017-08-16 | 株式会社Soken | アンテナ |
TWI580111B (zh) * | 2015-07-09 | 2017-04-21 | 廣達電腦股份有限公司 | 通訊裝置 |
JP6458690B2 (ja) * | 2015-09-10 | 2019-01-30 | 株式会社デンソーウェーブ | Rfid読取装置 |
JP2018157244A (ja) * | 2017-03-15 | 2018-10-04 | 株式会社デンソーウェーブ | アンテナ装置のグランド接続構造 |
SE541063C2 (en) * | 2017-10-30 | 2019-03-26 | Smarteq Wireless Ab | Ground plane independent antenna |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004241837A (ja) * | 2003-02-03 | 2004-08-26 | Taiyo Yuden Co Ltd | 無線通信装置 |
JP2005079747A (ja) * | 2003-08-29 | 2005-03-24 | Taiyo Yuden Co Ltd | 通信装置 |
JP3758495B2 (ja) | 1999-02-25 | 2006-03-22 | 三菱マテリアル株式会社 | アンテナ装置及びアンテナ装置の製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69529496D1 (de) * | 1994-03-08 | 2003-03-06 | Telit Mobile Terminals Spa | Tragbares sende-und/oder empfangsgerät |
US6288680B1 (en) * | 1998-03-18 | 2001-09-11 | Murata Manufacturing Co., Ltd. | Antenna apparatus and mobile communication apparatus using the same |
JP2001168625A (ja) * | 1999-12-08 | 2001-06-22 | Toshiba Corp | 無線通信装置および電子機器 |
KR100702088B1 (ko) * | 2000-01-31 | 2007-04-02 | 미츠비시 마테리알 가부시키가이샤 | 안테나 장치 및 안테나 장치 조립체 |
US6421016B1 (en) * | 2000-10-23 | 2002-07-16 | Motorola, Inc. | Antenna system with channeled RF currents |
US6380903B1 (en) * | 2001-02-16 | 2002-04-30 | Telefonaktiebolaget L.M. Ericsson | Antenna systems including internal planar inverted-F antennas coupled with retractable antennas and wireless communicators incorporating same |
EP1329985A3 (en) * | 2002-01-18 | 2004-12-22 | Matsushita Electric Industrial Co., Ltd. | Antenna apparatus; communication apparatus; and antenna apparatus designing method |
EP1703586A4 (en) | 2003-12-25 | 2008-01-23 | Mitsubishi Materials Corp | ANTENNA DEVICE AND COMMUNICATION DEVICE |
US7330156B2 (en) * | 2004-08-20 | 2008-02-12 | Nokia Corporation | Antenna isolation using grounded microwave elements |
TWM281308U (en) * | 2005-06-28 | 2005-11-21 | Wistron Neweb Corp | Antenna and application thereof |
-
2006
- 2006-06-29 JP JP2006180513A patent/JP4688068B2/ja not_active Expired - Fee Related
-
2007
- 2007-06-29 ES ES07767927T patent/ES2425369T3/es active Active
- 2007-06-29 WO PCT/JP2007/063142 patent/WO2008001899A1/ja active Application Filing
- 2007-06-29 KR KR1020087031720A patent/KR101367586B1/ko active IP Right Grant
- 2007-06-29 TW TW096123778A patent/TWI440251B/zh not_active IP Right Cessation
- 2007-06-29 CN CN2007800242013A patent/CN101479879B/zh active Active
- 2007-06-29 EP EP07767927.2A patent/EP2040328B1/en active Active
- 2007-06-29 US US12/306,614 patent/US7982682B2/en not_active Expired - Fee Related
-
2009
- 2009-07-27 HK HK09106890.9A patent/HK1128832A1/xx not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3758495B2 (ja) | 1999-02-25 | 2006-03-22 | 三菱マテリアル株式会社 | アンテナ装置及びアンテナ装置の製造方法 |
JP2004241837A (ja) * | 2003-02-03 | 2004-08-26 | Taiyo Yuden Co Ltd | 無線通信装置 |
JP2005079747A (ja) * | 2003-08-29 | 2005-03-24 | Taiyo Yuden Co Ltd | 通信装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2040328A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012039582A (ja) * | 2010-08-12 | 2012-02-23 | Casio Comput Co Ltd | マルチバンドアンテナ及び電子機器 |
Also Published As
Publication number | Publication date |
---|---|
EP2040328B1 (en) | 2013-05-22 |
ES2425369T3 (es) | 2013-10-15 |
CN101479879A (zh) | 2009-07-08 |
EP2040328A4 (en) | 2010-04-21 |
JP2008011281A (ja) | 2008-01-17 |
JP4688068B2 (ja) | 2011-05-25 |
US7982682B2 (en) | 2011-07-19 |
TWI440251B (zh) | 2014-06-01 |
CN101479879B (zh) | 2012-12-05 |
KR101367586B1 (ko) | 2014-02-25 |
TW200810236A (en) | 2008-02-16 |
US20090273535A1 (en) | 2009-11-05 |
EP2040328A1 (en) | 2009-03-25 |
HK1128832A1 (en) | 2009-11-06 |
KR20090031689A (ko) | 2009-03-27 |
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