WO2010095300A1 - チップアンテナ及びアンテナ装置 - Google Patents
チップアンテナ及びアンテナ装置 Download PDFInfo
- Publication number
- WO2010095300A1 WO2010095300A1 PCT/JP2009/066338 JP2009066338W WO2010095300A1 WO 2010095300 A1 WO2010095300 A1 WO 2010095300A1 JP 2009066338 W JP2009066338 W JP 2009066338W WO 2010095300 A1 WO2010095300 A1 WO 2010095300A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- antenna
- parasitic
- chip antenna
- dielectric substrate
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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
- 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
- H01Q9/32—Vertical arrangement of element
- H01Q9/36—Vertical arrangement of element with top loading
-
- 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
-
- 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 present invention relates to a chip antenna and an antenna device including the chip antenna, and more particularly to a chip antenna having various electrodes formed on the outer surface of a rectangular parallelepiped dielectric substrate and an antenna device including the chip antenna.
- Patent Document 1 discloses a chip antenna in which a feeding electrode and a parasitic electrode facing each other at a predetermined interval are formed on a dielectric substrate.
- 1A is a six-sided view of a chip antenna disclosed in Patent Document 1
- FIG. 1B is an equivalent circuit diagram thereof.
- a feeding electrode 34 is formed from the lower surface of a rectangular parallelepiped dielectric base 31 to the upper surface via the fourth side surface.
- a parasitic electrode 36 is formed from the lower surface to the upper surface via the third side surface.
- the feeding electrode 34 and the non-feeding electrode 36 are formed on the upper surface of the dielectric substrate 31 so as to face each other at a predetermined interval.
- the feeding electrode 34 and the non-feeding electrode 36 are coupled by their open ends facing each other at a predetermined interval. This is to obtain a wide band characteristic.
- the chip antenna 30 is mounted in the non-ground region on the circuit board, but the resonance frequency of the antenna strongly depends on the positional relationship with respect to the ground electrode on the circuit board. .
- the resonance frequency of the antenna strongly depends on the positional relationship with respect to the ground electrode on the circuit board.
- An object of the present invention is to provide a chip antenna that is hardly affected by the ground electrode existing below the chip antenna when mounted on a circuit board, has little frequency fluctuation, and has little antenna gain deterioration, and an antenna having the chip antenna To provide an apparatus.
- the chip antenna of the present invention is configured as follows.
- a rectangular parallelepiped-shaped dielectric substrate having a lower surface, an upper surface, first and second side surfaces facing each other, and third and fourth side surfaces facing each other; and an electrode formed on an outer surface of the dielectric substrate.
- No electrodes are formed on the first side surface and the second side surface of the dielectric substrate
- a parasitic electrode is formed from the fourth side surface to the upper surface of the dielectric substrate, and a parasitic electrode facing the parasitic electrode at a predetermined interval from the third side surface to the upper surface of the dielectric substrate.
- a feeding electrode is formed, On the lower surface of the dielectric substrate, a lower electrode for a parasitic electrode is formed which is electrically connected to the two parasitic electrodes, and is electrically connected to a parasitic line of a circuit board on which the circuit is mounted. On the dielectric substrate, a feeding electrode that forms a capacitance with either one of the two parasitic electrodes is formed, It is assumed that a lower surface electrode for a power supply electrode is formed on the lower surface of the dielectric substrate, and is electrically connected to the power supply electrode and connected to a power supply line of a circuit board on which the dielectric substrate is mounted.
- the antenna device includes a chip antenna having the above-described configuration and a circuit board on which the chip antenna is mounted.
- the circuit board includes one or several of the feeding line and the parasitic line. Alternatively, a frequency adjusting element connected between all and the ground electrode of the circuit board is provided.
- an impedance element connected between the feeder line and a ground electrode of the circuit board is provided on the circuit board.
- the parasitic electrode is connected to the ground electrode (grounded).
- Current flows on the boundary between the ground electrode and the non-ground region, and the current path of the antenna is on the boundary between the ground electrode and the non-ground region.
- the current path of the antenna looks long (equivalently longer), the frequency is lowered, and the antenna can be downsized.
- the antenna looks larger due to the current path (the equivalent antenna volume is increased), thereby improving the antenna gain.
- the resonance frequency can be lowered as compared with a structure in which power is fed directly to the feeding electrode. Can be achieved.
- FIG. 6 is a six-sided view and an equivalent circuit diagram of a chip antenna disclosed in Patent Document 1.
- FIG. 2A is a hexahedral view of the chip antenna 101 according to the first embodiment
- FIG. 2B is a perspective view of the antenna device 201 using the chip antenna 101
- FIG. FIG. It is a perspective view of the antenna apparatus 202 which concerns on 2nd Embodiment.
- FIG. 2A is a hexahedral view of the chip antenna 101 according to the first embodiment
- FIG. 2B is a perspective view of a main part of the antenna device 201 including the chip antenna 101
- FIG. 2C is an antenna.
- 3 is an equivalent circuit diagram of the device 201.
- the rectangular parallelepiped dielectric base 10 includes a lower surface (mounting surface for a circuit board), an upper surface, first and second side surfaces facing each other, and third and fourth side surfaces facing each other.
- a parasitic electrode 18 is formed from the fourth side surface to the upper surface of the dielectric substrate 10.
- the parasitic electrode 12 is formed from the third side surface to the upper surface of the dielectric substrate 10. The leading ends (open ends) of the parasitic electrode 18 and the parasitic electrode 12 face each other at a predetermined interval on the upper surface of the dielectric substrate 10.
- a feeding electrode 19 is formed in the vicinity of the parasitic electrode 18.
- the lower surface of the dielectric substrate 10 there are formed non-power-feeding lower surface electrodes 12 ⁇ / b> C and 18 ⁇ / b> C that are electrically connected to the non-power-feeding electrodes 12 and 18.
- a lower surface electrode 19 ⁇ / b> C for a feeding electrode that is electrically connected to the feeding electrode 19 is formed on the lower surface of the dielectric substrate 10.
- a ground electrode 20 is formed on the upper surface of the circuit board 50, and a non-ground region NGA is provided.
- a chip antenna 101 is mounted in this non-ground area NGA as shown in the figure.
- the non-ground region NGA is formed with a feed line 27 and non-feed lines 22 and 28, respectively.
- the lower electrode 19 ⁇ / b> C for the feeding electrode is electrically connected to the feeding line 27.
- the lower electrode 12C and 18C for the non-feeding electrode are electrically connected to the non-feeding lines 22 and 28, respectively.
- a power supply circuit not shown in FIG. 2B is connected between the power supply line 27 and the ground electrode 20.
- the equivalent circuit of the antenna device 201 is as shown in FIG. As described above, since a capacity for performing capacitive power feeding to the parasitic electrode 18 is generated between the parasitic electrode 18 and the feeding electrode 19, the resonance frequency can be lowered as compared with a structure in which power is directly fed to the feeding electrode. . Accordingly, the chip antenna and the antenna device can be reduced in size.
- the current path of the antenna looks long (equivalently longer), the frequency is lowered, and the antenna can be downsized. Furthermore, the antenna looks larger due to the current path (the equivalent antenna volume is increased), thereby improving the antenna gain.
- FIG. 3 is a perspective view of the antenna device 202 according to the second embodiment.
- a ground electrode 20 is formed on the upper surface of the circuit board 50 and a non-ground region NGA is provided.
- a chip antenna 101 is mounted in this non-ground area NGA as shown in the figure.
- the chip antenna 101 is the same as the chip antenna 101 shown in the first embodiment.
- a feed line 27 and non-feed lines 22 and 28 are formed in the non-ground region NGA of the circuit board 50.
- the lower electrode 18C for the feeding electrode is electrically connected to the feeding line 27. Further, the lower electrode 12C and 18C for the non-feed electrode are electrically connected to the non-feed lines 22 and 28, respectively.
- a power supply circuit not shown in FIG. 3 is connected between the power supply line 27 and the ground electrode 20.
- a frequency adjusting element 63 is connected in series to the parasitic line 22.
- An impedance element 61 is connected in parallel between the power supply line 27 and the ground electrode 20.
- the antenna device 202 is configured by mounting the frequency adjusting element 63, the impedance element 61, and the chip antenna 101 on the circuit board 50 in this way.
- the frequency adjustment element 63 and the impedance element 61 are, for example, a chip capacitor or a chip inductor, and the resonance frequency and impedance of the antenna can be set by their impedance.
- the resonant frequency of the antenna can be lowered by using an inductive element as the frequency adjusting element 63 connected in series to the root of the parasitic electrode 12.
- impedance matching between the feeding circuit and the antenna device 202 can be achieved by the impedance element 61 connected between the feeding line 27 and the ground electrode 20.
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- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
下面、上面、互いに対向する第1・第2の側面、及び互いに対向する第3・第4の側面を有する直方体形状の誘電体基体と、前記誘電体基体の外面に形成された電極とを備えた、チップアンテナにおいて、
前記誘電体基体の第1の側面及び第2の側面には電極が形成されず、
前記誘電体基体の前記第4の側面から前記上面にかけて無給電電極が形成され、前記誘電体基体の前記第3の側面から前記上面にかけて、前記無給電電極との間に所定間隔で対向する無給電電極が形成され、
前記誘電体基体の下面に、前記二つの無給電電極にそれぞれ導通し、実装先の回路基板の無給電ラインにそれぞれ導通する無給電電極用下面電極が形成され、
前記誘電体基体に、前記二つの無給電電極のうちいずれか一方との間で容量を形成する給電電極が形成され、
前記誘電体基体の下面に、前記給電電極に導通し、実装先の回路基板の給電ラインに導通する給電電極用下面電極が形成されたものとする。
図2(A)は第1の実施形態に係るチップアンテナ101の六面図、図2(B)はチップアンテナ101を備えたアンテナ装置201の主要部の斜視図、図2(C)はアンテナ装置201の等価回路図である。
誘電体基体10の第4側面から上面にかけて無給電電極18が形成されている。また、誘電体基体10の第3側面から上面にかけて無給電電極12が形成されている。無給電電極18と無給電電極12の先端(開放端)は誘電体基体10の上面において所定間隔で対向している。
誘電体基体10の下面には、無給電電極12,18に導通する無給電用下面電極12C,18Cが形成されている。また、誘電体基体10の下面には、給電電極19に導通する給電電極用下面電極19Cが形成されている。
図3は第2の実施形態に係るアンテナ装置202の斜視図である。
回路基板50の上面にはグランド電極20が形成されるとともに、非グランド領域NGAが設けられている。この非グランド領域NGA内に図に示すようにチップアンテナ101が実装される。チップアンテナ101は第1の実施形態で示したチップアンテナ101と同じである。回路基板50の非グランド領域NGAには給電ライン27及び無給電ライン22,28が形成されている。
12,18…無給電電極
12C,18C…無給電電極用下面電極
19…給電電極
19C…給電電極用下面電極
20…グランド電極
22,28…無給電ライン
27…給電ライン
50…回路基板
61…インピーダンス素子
63…周波数調整素子
101…チップアンテナ
201,202…アンテナ装置
NGA…非グランド領域
Claims (3)
- 下面、上面、互いに対向する第1・第2の側面、及び互いに対向する第3・第4の側面を有する直方体形状の誘電体基体と、前記誘電体基体の外面に形成された電極とを備えた、チップアンテナにおいて、
前記誘電体基体の第1の側面及び第2の側面には電極が形成されず、
前記誘電体基体の前記第4の側面から前記上面にかけて無給電電極が形成され、前記誘電体基体の前記第3の側面から前記上面にかけて、前記無給電電極との間に所定間隔で対向する無給電電極が形成され、
前記誘電体基体の下面に、前記二つの無給電電極にそれぞれ導通し、実装先の回路基板の無給電ラインにそれぞれ導通する無給電電極用下面電極が形成され、
前記誘電体基体に、前記二つの無給電電極のうちいずれか一方との間で容量を形成する給電電極が形成され、
前記誘電体基体の下面に、前記給電電極に導通し、実装先の回路基板の給電ラインに導通する給電電極用下面電極が形成された、チップアンテナ。 - 請求項1に記載のチップアンテナと、前記チップアンテナが実装される回路基板とで構成されるアンテナ装置であって、
前記回路基板に、前記給電ライン、前記無給電ラインのうちいずれか一つまたは幾つか若しくは全てと前記回路基板のグランド電極との間に接続される周波数調整素子が設けられた、アンテナ装置。 - 請求項1に記載のチップアンテナと、前記チップアンテナが実装される回路基板とで構成されるアンテナ装置であって、
前記回路基板に、前記給電ラインと前記回路基板のグランド電極との間に接続されるインピーダンス素子が設けられた、アンテナ装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011500452A JP5263383B2 (ja) | 2009-02-20 | 2009-09-18 | アンテナ装置 |
CN200980157159.1A CN102326292B (zh) | 2009-02-20 | 2009-09-18 | 片状天线及天线装置 |
US13/213,940 US20110298683A1 (en) | 2009-02-20 | 2011-08-19 | Chip antenna and antenna device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009-038436 | 2009-02-20 | ||
JP2009038436 | 2009-02-20 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/213,940 Continuation US20110298683A1 (en) | 2009-02-20 | 2011-08-19 | Chip antenna and antenna device |
Publications (1)
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WO2010095300A1 true WO2010095300A1 (ja) | 2010-08-26 |
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PCT/JP2009/066338 WO2010095300A1 (ja) | 2009-02-20 | 2009-09-18 | チップアンテナ及びアンテナ装置 |
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US (1) | US20110298683A1 (ja) |
JP (1) | JP5263383B2 (ja) |
CN (1) | CN102326292B (ja) |
WO (1) | WO2010095300A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103563173A (zh) * | 2011-05-25 | 2014-02-05 | 株式会社村田制作所 | 天线装置及通信终端装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2010087043A1 (ja) * | 2009-01-29 | 2010-08-05 | 株式会社村田製作所 | チップアンテナ及びアンテナ装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01231404A (ja) * | 1988-03-10 | 1989-09-14 | Toyota Central Res & Dev Lab Inc | 移動体用アンテナ |
JP2003347835A (ja) * | 2002-05-24 | 2003-12-05 | Murata Mfg Co Ltd | アンテナ構造およびそれを備えた通信機 |
JP2005150937A (ja) * | 2003-11-12 | 2005-06-09 | Murata Mfg Co Ltd | アンテナ構造およびそれを備えた通信機 |
WO2006120763A1 (ja) * | 2005-05-13 | 2006-11-16 | Murata Manufacturing Co., Ltd. | アンテナ構造およびそれを備えた無線通信機 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3279205B2 (ja) * | 1996-12-10 | 2002-04-30 | 株式会社村田製作所 | 表面実装型アンテナおよび通信機 |
JP3351363B2 (ja) * | 1998-11-17 | 2002-11-25 | 株式会社村田製作所 | 表面実装型アンテナおよびそれを用いた通信装置 |
KR100616509B1 (ko) * | 2002-05-31 | 2006-08-29 | 삼성전기주식회사 | 광대역 칩 안테나 |
FI118748B (fi) * | 2004-06-28 | 2008-02-29 | Pulse Finland Oy | Pala-antenni |
CN1989652B (zh) * | 2004-06-28 | 2013-03-13 | 脉冲芬兰有限公司 | 天线部件 |
-
2009
- 2009-09-18 WO PCT/JP2009/066338 patent/WO2010095300A1/ja active Application Filing
- 2009-09-18 CN CN200980157159.1A patent/CN102326292B/zh not_active Expired - Fee Related
- 2009-09-18 JP JP2011500452A patent/JP5263383B2/ja not_active Expired - Fee Related
-
2011
- 2011-08-19 US US13/213,940 patent/US20110298683A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01231404A (ja) * | 1988-03-10 | 1989-09-14 | Toyota Central Res & Dev Lab Inc | 移動体用アンテナ |
JP2003347835A (ja) * | 2002-05-24 | 2003-12-05 | Murata Mfg Co Ltd | アンテナ構造およびそれを備えた通信機 |
JP2005150937A (ja) * | 2003-11-12 | 2005-06-09 | Murata Mfg Co Ltd | アンテナ構造およびそれを備えた通信機 |
WO2006120763A1 (ja) * | 2005-05-13 | 2006-11-16 | Murata Manufacturing Co., Ltd. | アンテナ構造およびそれを備えた無線通信機 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103563173A (zh) * | 2011-05-25 | 2014-02-05 | 株式会社村田制作所 | 天线装置及通信终端装置 |
CN103563173B (zh) * | 2011-05-25 | 2016-06-08 | 株式会社村田制作所 | 天线装置及通信终端装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5263383B2 (ja) | 2013-08-14 |
US20110298683A1 (en) | 2011-12-08 |
CN102326292B (zh) | 2015-02-18 |
JPWO2010095300A1 (ja) | 2012-08-16 |
CN102326292A (zh) | 2012-01-18 |
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