JP2003133839A5 - - Google Patents
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- Publication number
- JP2003133839A5 JP2003133839A5 JP2001326554A JP2001326554A JP2003133839A5 JP 2003133839 A5 JP2003133839 A5 JP 2003133839A5 JP 2001326554 A JP2001326554 A JP 2001326554A JP 2001326554 A JP2001326554 A JP 2001326554A JP 2003133839 A5 JP2003133839 A5 JP 2003133839A5
- Authority
- JP
- Japan
- Prior art keywords
- dielectric substrate
- radiation conductor
- monopole antenna
- substrate
- dielectric
- 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.)
- Withdrawn
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- 239000000758 substrate Substances 0.000 description 12
- 239000004020 conductor Substances 0.000 description 9
- 230000005855 radiation Effects 0.000 description 8
- 230000005404 monopole Effects 0.000 description 6
- 230000009977 dual effect Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Description
【0001】
【発明の属する技術分野】
本発明は、通信や放送の送受信に用いられ二つの周波数帯で動作するデュアルバンド用のモノポールアンテナに係り、特に、車載用や携帯用として好適なデュアルバンド用モノポールアンテナに関する。
[0001]
Field of the Invention
The present invention relates to a dual band monopole antenna that is used for communication and broadcast transmission and reception and operates in two frequency bands, and more particularly to a dual band monopole antenna suitable for use in vehicles and portable phones.
【0003】
【発明が解決しようとする課題】
上述した従来のデュアルバンド用モノポールアンテナは、ロッド状の各放射導体の全長がλ/4なので、例えば1.9GHz帯域の電波を送受信する放射導体の全長は約4cmと短いが、800MHz帯域の電波を送受信する放射導体の場合、その全長が10cm近く必要となり、車載用モノポールアンテナとしては高さ寸法が大きすぎるという問題があった。
[0003]
[Problems to be solved by the invention]
In the conventional dual band monopole antenna described above, since the total length of each rod-shaped radiation conductor is λ / 4, for example, the total length of the radiation conductor for transmitting and receiving radio waves in the 1.9 GHz band is as short as about 4 cm. In the case of a radiation conductor that transmits and receives radio waves, the total length needs to be approximately 10 cm, and there is a problem that the height dimension is too large for a car-mounted monopole antenna.
なお、最近、セラミック等の誘電体基板の表面に印刷やエッチング等の手法で一定幅の帯状の放射導体を形成することにより、高さ寸法を低減したモノポールアンテナが提案されている。かかる従来提案によれば、誘電体による波長短縮によって放射導体の全長を20%前後短縮することが可能なので、例えば800MHz帯域用の放射導体の長さを8cm近くまで短縮させることができるが、車載用モノポールアンテナのように高さ寸法の制約が大きい場合には、放射導体をさらに短くすることが要望されている。 Recently, a monopole antenna has been proposed in which the height dimension is reduced by forming a band-shaped radiation conductor of a fixed width on the surface of a dielectric substrate such as ceramic by a method such as printing or etching. According according to the conventional proposal, since it is possible to shorten the overall length about 20% of the radiation conductor by a wavelength shortening by the dielectric, for example, the length of the radiating conductor for 800MHz band can be reduced to near 8 cm, vehicle If constraints height as use monopole antenna is large, it is desired that even shorter radiation conductor.
この第3実施形態例では、誘電体基板2上に略直交させて誘電体小基板20が設けてあり、この誘電体小基板20の表面のほぼ全面に第1の放射導体3の水平部31が形成してある。誘電体小基板20は誘電体基板2と共通の基板から作製したものであり、誘電体基板2上の凸部2aを誘電体小基板20の中央部の透孔に挿通した状態で両者2,20が接着剤等により一体化されている。第1の放射導体3は、誘電体基板2の表面に上下方向に沿って設けられた起立部30と、誘電体小基板20の表面に沿って設けられた水平部31と、誘電体基板2上の凸部2aに設けられた連結部32とからなり、この連結部32を介して起立部30と水平部31とが接続されている。ただし、起立部30は前述した各実施形態例とほぼ同形状の幅広部3aおよび幅狭部3bからなり、連結部32は幅広部3aの上端に連続している。また、連結部32と水平部31は半田付けされている。 In the third embodiment, the dielectric small substrate 20 is provided substantially orthogonal to the dielectric substrate 2, and the horizontal portion 31 of the first radiation conductor 3 is provided on substantially the entire surface of the dielectric small substrate 20. Is formed. The small dielectric substrate 20 is manufactured from the same substrate as the dielectric substrate 2, and the two projections 2 a and 2 b on the dielectric substrate 2 are inserted into the through holes in the central portion of the small dielectric substrate 20. 20 are integrated by an adhesive or the like. The first radiation conductor 3 includes an upright portion 30 provided on the surface of the dielectric substrate 2 along the vertical direction, a horizontal portion 31 provided along the surface of the small dielectric substrate 20, and the dielectric substrate 2. It consists of the connection part 32 provided in the upper convex part 2a, and the standing part 30 and the horizontal part 31 are connected via this connection part 32. As shown in FIG. However, the rising portion 30 is composed of the wide portion 3a and the narrow portion 3b having substantially the same shape as each of the embodiments described above, and the connecting portion 32 is continuous with the upper end of the wide portion 3a. Moreover, the connection part 32 and the horizontal part 31 are soldered.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001326554A JP2003133839A (en) | 2001-10-24 | 2001-10-24 | Monopole antenna |
US10/278,676 US6809687B2 (en) | 2001-10-24 | 2002-10-23 | Monopole antenna that can easily be reduced in height dimension |
EP02257404A EP1306924A3 (en) | 2001-10-24 | 2002-10-24 | Monopole antenna that can easily be reduced in height dimension |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001326554A JP2003133839A (en) | 2001-10-24 | 2001-10-24 | Monopole antenna |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2003133839A JP2003133839A (en) | 2003-05-09 |
JP2003133839A5 true JP2003133839A5 (en) | 2005-04-07 |
Family
ID=19142914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001326554A Withdrawn JP2003133839A (en) | 2001-10-24 | 2001-10-24 | Monopole antenna |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2003133839A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7002858B2 (en) | 2017-04-26 | 2022-02-04 | 株式会社ヨコオ | Antenna device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4271591B2 (en) * | 2004-01-30 | 2009-06-03 | 双信電機株式会社 | Antenna device |
JP2012054662A (en) * | 2010-08-31 | 2012-03-15 | Denso Corp | Control system |
WO2019003683A1 (en) * | 2017-06-27 | 2019-01-03 | 株式会社村田製作所 | Dual band compatible antenna device |
-
2001
- 2001-10-24 JP JP2001326554A patent/JP2003133839A/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7002858B2 (en) | 2017-04-26 | 2022-02-04 | 株式会社ヨコオ | Antenna device |
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