JP2003133838A5 - - Google Patents

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Publication number
JP2003133838A5
JP2003133838A5 JP2001326551A JP2001326551A JP2003133838A5 JP 2003133838 A5 JP2003133838 A5 JP 2003133838A5 JP 2001326551 A JP2001326551 A JP 2001326551A JP 2001326551 A JP2001326551 A JP 2001326551A JP 2003133838 A5 JP2003133838 A5 JP 2003133838A5
Authority
JP
Japan
Prior art keywords
monopole antenna
radio waves
total length
radiation conductor
vehicle
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Withdrawn
Application number
JP2001326551A
Other languages
Japanese (ja)
Other versions
JP2003133838A (en
Filing date
Publication date
Application filed filed Critical
Priority to JP2001326551A priority Critical patent/JP2003133838A/en
Priority claimed from JP2001326551A external-priority patent/JP2003133838A/en
Priority to US10/278,676 priority patent/US6809687B2/en
Priority to EP02257404A priority patent/EP1306924A3/en
Publication of JP2003133838A publication Critical patent/JP2003133838A/en
Publication of JP2003133838A5 publication Critical patent/JP2003133838A5/ja
Withdrawn legal-status Critical Current

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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る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モノポールアンテナに関する。 [0001]
Field of the Invention
The present invention relates to a monopole antenna used for communication and transmission / reception of broadcast, and more particularly to a monopole antenna suitable for on-vehicle use and portable use.

【０００３】
【発明が解決しようとする課題】
しかしながら、上述した従来のモノポールアンテナは、ロッド状の放射導体の全長がλ／４なので、例えば携帯電話に多用されている８００ＭＨｚ帯域の電波の送受信を行う場合、全長が１０ｃｍ近い放射導体が必要となり、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。しかも、この種のモノポールアンテナは共振周波数帯域が狭く、特定の周波数付近の電波に対してだけ共振するので、受信しようとする電波の周波数にばらつきがある場合、感度が極端に低下してしまう恐れがあった。 [0003]
[Problems to be solved by the invention]
However, in the conventional monopole antenna described above, since the total length of the rod-shaped radiation conductor is λ / 4, for example, when transmitting and receiving radio waves in the 800 MHz band frequently used for mobile phones, the radiation conductor needs to be about 10 cm in total length As a result, there is a problem that the height dimension is too large as an on- vehicle monopole antenna. In addition, since this type of monopole antenna has a narrow resonant frequency band and resonates only with radio waves near a specific frequency, if there is variation in the frequency of radio waves to be received, the sensitivity is extremely reduced. There was a fear.

JP2001326551A 2001-10-24 2001-10-24 Monopole antenna Withdrawn JP2003133838A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2001326551A JP2003133838A (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
JP2001326551A JP2003133838A (en) 2001-10-24 2001-10-24 Monopole antenna

Publications (2)

Publication Number Publication Date
JP2003133838A JP2003133838A (en) 2003-05-09
JP2003133838A5 true JP2003133838A5 (en) 2005-04-07

Family

ID=19142912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001326551A Withdrawn JP2003133838A (en) 2001-10-24 2001-10-24 Monopole antenna

Country Status (1)

Country Link
JP (1) JP2003133838A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100555744C (en) * 2004-11-18 2009-10-28 富士康(昆山)电脑接插件有限公司 Antenna and impedance matching methods thereof
JP4332494B2 (en) 2004-12-22 2009-09-16 アルプス電気株式会社 Antenna device
JP4656158B2 (en) * 2008-02-04 2011-03-23 株式会社村田製作所 Antenna device
EP2495807B1 (en) 2011-03-03 2016-09-14 Nxp B.V. Multiband antenna
WO2013077302A1 (en) * 2011-11-25 2013-05-30 株式会社村田製作所 Antenna device and electronic apparatus

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