WO2009139144A1 - アンテナ装置 - Google Patents
アンテナ装置 Download PDFInfo
- Publication number
- WO2009139144A1 WO2009139144A1 PCT/JP2009/002050 JP2009002050W WO2009139144A1 WO 2009139144 A1 WO2009139144 A1 WO 2009139144A1 JP 2009002050 W JP2009002050 W JP 2009002050W WO 2009139144 A1 WO2009139144 A1 WO 2009139144A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- ground pattern
- circuit
- antenna device
- substrate
- 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
- H01Q1/36—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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
- H01Q1/3241—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems particular used in keyless entry systems
-
- 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
Definitions
- the present invention relates to an antenna device suitable for wireless communication technology such as a keyless operation system for automobiles.
- Patent Document 1 proposes a mobile radio that increases the gain using a hand strap.
- a built-in antenna element is provided in the housing of the wireless device main body, and a hand strap connection part to which a conductive ring-shaped hand strap is attached is provided in the vicinity of the built-in antenna element.
- the element is electromagnetically coupled to obtain high gain.
- the present invention has been made in view of the above-described problems, and reduces the deterioration of characteristics due to downsizing, thinning, and the like, and improves the characteristics of the built-in antenna to achieve high gain and wide area.
- the purpose is to provide.
- the antenna device of the present invention includes a substrate, a radio circuit unit provided on the substrate, a built-in antenna provided on the substrate and connected to the radio circuit unit, and a radio circuit unit provided on the substrate.
- a circuit-side ground pattern connected to the antenna and an antenna-dedicated ground pattern provided on the substrate and connected to the built-in antenna are provided.
- the antenna-dedicated ground pattern connected to the built-in antenna is provided on the substrate separately from the circuit-side ground pattern. Antenna characteristics such as frequency bandwidth are improved. A line capacitance is generated according to the distance between the antenna-dedicated ground pattern and the circuit-side ground pattern, and an effect such as electrostatic countermeasures can be obtained.
- the antenna device of the present invention is characterized in that the antenna-dedicated ground pattern extends in a direction orthogonal to the extending direction of the built-in antenna. That is, in this antenna device, since the antenna-dedicated ground pattern extends in a direction orthogonal to the extending direction of the built-in antenna, compared to the case where the antenna antenna extends in the same direction as the extending direction of the built-in antenna. The overall length can be shortened and space can be saved.
- the antenna device of the present invention is characterized by including a metal portion protruding from the substrate, and the antenna-dedicated ground pattern is connected to the metal portion. That is, in this antenna device, the antenna-dedicated ground pattern is connected to the metal portion protruding from the substrate. Therefore, even if a sufficient antenna-dedicated ground pattern cannot be secured due to the downsizing of the device, the size depends on the size of the metal portion. Antenna characteristics are improved.
- the antenna device of the present invention is characterized in that the metal part is a strap holder. That is, in this antenna device, since the metal part is a strap holder, a hand strap can be attached to the strap holder, and it can be used as a strap holder as well as a function of improving antenna characteristics. Further, even when a hand strap is attached to the metal part, it is possible to eliminate deterioration of antenna characteristics and unstable elements. In addition, the hand strap to be attached is no longer required to be conductive, and the design, cost, and productivity including the hand strap are excellent.
- the antenna device of the present invention is characterized in that an electrostatic countermeasure circuit portion is provided between the metal portion and the antenna-dedicated ground pattern. That is, in this antenna device, since the antenna-dedicated ground pattern is connected to the metal part via the anti-static circuit part, the radio circuit part and the like are protected against surges entering from the metal part by the anti-static circuit part. Can do.
- the antenna device of the present invention includes a ground adjusting unit that locally connects the antenna-dedicated ground pattern and the circuit-side ground pattern in at least one place. That is, in this antenna device, since the ground adjustment unit that locally connects the antenna-dedicated ground pattern and the circuit-side ground pattern in at least one location is provided, by arbitrarily setting the installation location of the ground adjustment portion, Noise countermeasures can be taken, and stabilization of the antenna-dedicated ground pattern and the circuit-side ground pattern can be achieved. This makes it possible to establish a design that combines noise countermeasures, electrostatic countermeasures, and ground pattern stabilization.
- the present invention has the following effects. That is, according to the antenna device of the present invention, the antenna-dedicated ground pattern connected to the built-in antenna is provided on the substrate separately from the circuit-side ground pattern. Antenna characteristics such as antenna gain and frequency bandwidth are improved by the pattern. Therefore, it is possible to reduce characteristic deterioration due to downsizing and thinning of the apparatus, and to improve the characteristics of the built-in antenna to achieve high gain and wide area.
- the antenna device of the present invention is suitable for use in any one of a reception antenna device, a transmission antenna device, and a transmission / reception antenna device used in a radio communication system mounted on an automobile or the like, particularly a keyless operation system.
- 1st Embodiment of the antenna device which concerns on this invention it is a top view which shows an antenna device. It is an equivalent circuit diagram in the antenna device of the first embodiment.
- the antenna apparatus of 1st Embodiment it is explanatory drawing which shows a dipole antenna and an inverted F antenna as an antenna kind when there is no matching circuit part.
- the antenna apparatus of 1st Embodiment it is a simple principal part enlarged view which shows the various shapes of a metal part.
- 2nd Embodiment of the antenna device which concerns on this invention it is a top view which shows an antenna device.
- 3rd Embodiment of the antenna device which concerns on this invention it is a top view which shows an antenna device.
- Example of the antenna device which concerns on this invention there is no circuit side ground pattern and it is a simple top view which shows the case where an antenna exclusive ground pattern is added.
- it is a graph which shows the radiation pattern with the Example which added the antenna-dedicated ground pattern without the circuit side ground pattern and the prior art example by which the circuit side ground pattern was reduced.
- it is a simple top view which shows the case where the antenna exclusive ground pattern is added in the state by which the circuit side ground pattern was reduced.
- FIGS. 1 to 4 a first embodiment of an antenna device according to the present invention will be described with reference to FIGS. 1 to 4.
- the scale is appropriately changed in order to make each member recognizable or easily recognizable.
- the antenna device 10 is a reception antenna device, a transmission antenna device, and a transmission / reception antenna device used in a wireless communication system, for example, a keyless operation system mounted in, for example, an automobile.
- a substrate 1, a wireless circuit unit 3 provided on the substrate 1, a built-in antenna 2 provided on the substrate 1 and connected to the wireless circuit unit 3, and a substrate 1 are provided.
- the antenna-dedicated ground pattern 11 and the circuit-side ground pattern 4 are formed of a conductor pattern such as a copper foil on the substrate 1, for example.
- a matching circuit unit 14 designed to match the built-in antenna 2 and the radio circuit unit 3 is provided.
- the matching circuit unit 14 has a circuit configuration in which one or a plurality of ⁇ -type LC circuits including a plurality of inductances L or capacitors C are provided.
- the keyless operation system is a keyless operation key that is installed on the main body of the car and the key when the driver or other person is carrying a key with a wireless communication function and approaches the wireless operating range.
- locking / unlocking operation so-called keyless entry system
- the power supply line from the matching circuit unit 14 is connected to the radio circuit unit 3, and the ground line is connected to the antenna-dedicated ground pattern 11. That is, the built-in antenna 2 is connected to the radio circuit unit 3 and the antenna-dedicated ground pattern 11 via the matching circuit unit 14.
- the matching circuit unit 14 since the matching circuit unit 14 is provided, the matching circuit unit 14 is connected to the antenna-specific ground pattern 11.
- the antenna may be designed including the matching circuit unit. is there. In that case, the same effect can be obtained even if a portion operating as the ground in the antenna element is used.
- an electrostatic countermeasure circuit portion 15 having a surge absorbing function is provided between the metal portion 12 and the antenna-dedicated ground pattern 11.
- the electrostatic countermeasure circuit unit 15 employs a general electrostatic countermeasure component such as a varistor.
- the antenna-dedicated ground pattern 11 extends linearly in a direction orthogonal to the extending direction of the built-in antenna 2.
- the antenna-dedicated ground pattern 11 can obtain better characteristics in all the characteristics as the length in the extending direction with respect to the circuit-side ground pattern 4 becomes longer.
- the antenna-dedicated ground pattern 11 can be set long by extending along the longitudinal direction of the antenna device 10.
- a chip antenna using a dielectric material for example, a chip antenna using a dielectric material, a pattern antenna formed of a conductor pattern such as a copper foil, a plate antenna using a sheet metal, a helical antenna, or the like can be used. Among these, a chip antenna is preferable because it can be downsized.
- the ground adjusting unit 13 uses a resistor, a capacitor, an inductor, or the like as a general passive element.
- the ground adjustment unit 13 can be provided at an arbitrary position as necessary. In the present embodiment, two ground adjustment units 13 are provided in the middle of the antenna-dedicated ground pattern 11, and the antenna-dedicated ground pattern 11 is provided. Are connected to the circuit-side ground pattern 4.
- the matching circuit unit 14 is not employed, for example, as shown in FIG. 3A, a dipole antenna, or as shown in FIG.
- the present embodiment can also be applied when operating as a part of. In this case, the same effect can be obtained by replacing the ground pattern operating as an antenna with the antenna-dedicated ground pattern 11.
- the metal portion 12 is a rod-shaped strap holder in which the hand strap 6 can be attached to a hole portion (not shown).
- the antenna-dedicated ground pattern 11 connected to the built-in antenna 2 is provided on the substrate 1 separately from the circuit-side ground pattern 4.
- Antenna characteristics such as antenna gain and frequency bandwidth are improved by the antenna-specific ground pattern 11 that does not depend on the pattern 4.
- the entire antenna-dedicated ground pattern 11 is compared with the case in which the antenna-dedicated ground pattern 11 extends in the same direction as the built-in antenna 2.
- the length can be shortened and space can be saved.
- the antenna-dedicated ground pattern 11 is connected to the metal portion 12 protruding from the substrate 1, even if a sufficient antenna-dedicated ground pattern 11 cannot be secured due to the downsizing of the device, Antenna characteristics are improved.
- the hand strap 6 can be attached to the metal part 12, and can be used as a strap holder as well as an improvement function of antenna characteristics. Further, even when the hand strap 6 is attached to the metal part 12, it is possible to eliminate deterioration of antenna characteristics and unstable elements. In addition, the hand strap 6 to be attached is no longer required to be conductive, and the design, cost, and productivity including the hand strap 6 are excellent.
- the antenna-dedicated ground pattern 11 is connected to the metal part 12 via the anti-static circuit part 15, the built-in antenna 2 and the radio circuit part 3 against a surge that enters from the metal part 12 by the anti-static circuit part 15. Etc. can be protected.
- the line-to-line capacitance depends on the distance between the antenna-dedicated ground pattern 11 and the circuit-side ground pattern 4. It is possible to obtain effects such as countermeasures against static electricity. On the contrary, the separation may cause adverse effects on the antenna characteristics and the radio circuit unit 3 due to the generation of noise from the radio circuit unit 3, but the antenna-dedicated ground pattern 11 and the circuit-side ground pattern 4 are connected to each other.
- the ground adjusting unit 13 that is locally connected in at least one place, it is possible to take measures against noise and the like, and the antenna-specific ground pattern 11 and the circuit-side ground pattern 4 can be stabilized. By these, it is possible to establish a design that combines noise countermeasures, electrostatic countermeasures, and ground pattern stabilization.
- the difference between the second embodiment and the first embodiment is that, in the first embodiment, the antenna-dedicated ground pattern 11 extending in a straight line with a constant width is formed, but the antenna device 20 of the second embodiment. Then, as shown in FIG. 5, an antenna-dedicated ground pattern 21 having a meander shape in the middle is formed. That is, in the antenna device 20 of the second embodiment, the middle of the antenna-dedicated ground pattern 21 has a meander shape, so that a longer antenna-dedicated ground pattern 21 than that of the first embodiment can be obtained, and a better antenna can be obtained. It becomes possible to obtain characteristics.
- the difference between the third and fourth embodiments and the first embodiment is that, in the first embodiment, the antenna-dedicated ground pattern 11 extending linearly is formed, but the third and fourth embodiments are different.
- L-shaped and U-shaped antenna-dedicated ground patterns 31 and 41 are formed. That is, in the antenna devices 30 and 40 of the third and fourth embodiments, the antenna-dedicated ground patterns 31 and 41 are L-shaped and U-shaped, so that the first embodiment is similar to the second embodiment.
- the longer antenna-dedicated ground patterns 31, 41 can be obtained, and better antenna characteristics can be obtained.
- the difference between the fifth embodiment and the first embodiment is that, in the first embodiment, the anti-static circuit portion 15 is connected to the antenna-dedicated ground pattern 11 and the metal portion 12, whereas the fifth embodiment is different from the fifth embodiment.
- the electrostatic countermeasure circuit unit 55 is also connected to the circuit-side ground pattern 4. That is, in the antenna device 50 of the fifth embodiment, since the electrostatic countermeasure circuit unit 55 is also connected to the circuit-side ground pattern 4, the electrostatic countermeasure circuit unit 55 is not only for protecting the built-in antenna 2 but also for the radio circuit unit. 3 is also used for protection, and electrostatic protection of both is possible.
- the substrate 1 provided with the wireless circuit unit 3 is designed, and as shown in FIG. (Reference state) is considered.
- the circuit-side ground pattern 4 becomes smaller as shown in FIG.
- the antenna gain is degraded by a maximum of 3 dB as compared with the ideal case (reference state) as shown in FIG.
- the antenna-dedicated ground pattern is provided on the substrate.
- the antenna-dedicated ground pattern may be designed in any layer such as an inner layer pattern.
- the antenna-specific ground pattern is preferably designed in a component layer on the substrate surface.
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
Description
Claims (6)
- 基板と、
該基板に設けられた無線回路部と、
前記基板に設けられ前記無線回路部に接続された内蔵アンテナと、
前記基板に設けられ前記無線回路部に接続された回路側グランドパターンと、
前記基板に設けられ前記内蔵アンテナに接続されたアンテナ専用グランドパターンと、
を備えていることを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置において、
前記アンテナ専用グランドパターンが、前記内蔵アンテナの延在方向に対して直交する方向に延在していることを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置において、
前記基板から突出して設けられた金属部を備え、
前記アンテナ専用グランドパターンが、前記金属部に接続されていることを特徴とするアンテナ装置。 - 請求項3に記載のアンテナ装置において、
前記金属部が、ストラップホルダであることを特徴とするアンテナ装置。 - 請求項3に記載のアンテナ装置において、
前記金属部と前記アンテナ専用グランドパターンとの間に、静電対策回路部が設けられていることを特徴とするアンテナ装置。 - 請求項1に記載のアンテナ装置において、
前記アンテナ専用グランドパターンと前記回路側グランドパターンとを少なくとも1箇所で局所的に接続するグランド調整部を備えていることを特徴とするアンテナ装置。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2723942A CA2723942C (en) | 2008-05-13 | 2009-05-11 | Antenna device |
US12/992,482 US8446324B2 (en) | 2008-05-13 | 2009-05-11 | Antenna device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008126005A JP5368730B2 (ja) | 2008-05-13 | 2008-05-13 | アンテナ装置 |
JP2008-126005 | 2008-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009139144A1 true WO2009139144A1 (ja) | 2009-11-19 |
Family
ID=41318519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/002050 WO2009139144A1 (ja) | 2008-05-13 | 2009-05-11 | アンテナ装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8446324B2 (ja) |
JP (1) | JP5368730B2 (ja) |
CA (1) | CA2723942C (ja) |
WO (1) | WO2009139144A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9588546B2 (en) * | 2012-10-26 | 2017-03-07 | Sony Corporation | Wireless electronic devices with a metal perimeter including a planar user input component |
FR3035526B1 (fr) * | 2015-04-27 | 2019-05-24 | Ingenico Group | Detection d'ouverture d'un dispositif de saisie de donnees |
TWI557998B (zh) * | 2015-06-18 | 2016-11-11 | 和碩聯合科技股份有限公司 | 天線模組 |
JP7002340B2 (ja) * | 2018-01-12 | 2022-01-20 | 株式会社ヨコオ | 車載用アンテナ装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08130786A (ja) * | 1994-10-31 | 1996-05-21 | Alpine Electron Inc | 電波式リモコンシステムの受信回路 |
JP2005109609A (ja) * | 2003-09-29 | 2005-04-21 | Nippon Soken Inc | 電波送信機 |
JP2007068115A (ja) * | 2005-09-02 | 2007-03-15 | Auto Network Gijutsu Kenkyusho:Kk | 車載用無線受信装置 |
JP2007267363A (ja) * | 2006-02-28 | 2007-10-11 | Nippon Soken Inc | 差動伝送用の回路基板装置 |
JP2007312004A (ja) * | 2006-05-17 | 2007-11-29 | Mitsubishi Electric Corp | アンテナ装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6097339A (en) * | 1998-02-23 | 2000-08-01 | Qualcomm Incorporated | Substrate antenna |
JP2001168625A (ja) * | 1999-12-08 | 2001-06-22 | Toshiba Corp | 無線通信装置および電子機器 |
US6664932B2 (en) * | 2000-01-12 | 2003-12-16 | Emag Technologies, Inc. | Multifunction antenna for wireless and telematic applications |
JP3469880B2 (ja) * | 2001-03-05 | 2003-11-25 | ソニー株式会社 | アンテナ装置 |
US6639559B2 (en) * | 2001-03-07 | 2003-10-28 | Hitachi Ltd. | Antenna element |
WO2003103087A2 (en) * | 2002-06-04 | 2003-12-11 | Skycross, Inc. | Wideband printed monopole antenna |
US7642969B2 (en) * | 2006-04-06 | 2010-01-05 | Lg Electronics Inc. | Mobile communication terminal incorporating internal antenna |
JP4688068B2 (ja) * | 2006-06-29 | 2011-05-25 | 三菱マテリアル株式会社 | アンテナ装置 |
-
2008
- 2008-05-13 JP JP2008126005A patent/JP5368730B2/ja not_active Expired - Fee Related
-
2009
- 2009-05-11 WO PCT/JP2009/002050 patent/WO2009139144A1/ja active Application Filing
- 2009-05-11 US US12/992,482 patent/US8446324B2/en active Active
- 2009-05-11 CA CA2723942A patent/CA2723942C/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08130786A (ja) * | 1994-10-31 | 1996-05-21 | Alpine Electron Inc | 電波式リモコンシステムの受信回路 |
JP2005109609A (ja) * | 2003-09-29 | 2005-04-21 | Nippon Soken Inc | 電波送信機 |
JP2007068115A (ja) * | 2005-09-02 | 2007-03-15 | Auto Network Gijutsu Kenkyusho:Kk | 車載用無線受信装置 |
JP2007267363A (ja) * | 2006-02-28 | 2007-10-11 | Nippon Soken Inc | 差動伝送用の回路基板装置 |
JP2007312004A (ja) * | 2006-05-17 | 2007-11-29 | Mitsubishi Electric Corp | アンテナ装置 |
Also Published As
Publication number | Publication date |
---|---|
US8446324B2 (en) | 2013-05-21 |
JP5368730B2 (ja) | 2013-12-18 |
JP2009278252A (ja) | 2009-11-26 |
US20110187622A1 (en) | 2011-08-04 |
CA2723942C (en) | 2016-06-28 |
CA2723942A1 (en) | 2009-11-19 |
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