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Novel Microstrip Antenna With Rotatable Patch Fed by Coaxial Line for Personal Handy-Phone System Units.

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Title: Novel Microstrip Antenna With Rotatable Patch Fed by Coaxial Line for Personal Handy-Phone System Units.
Authors: Ando, Atsuya1 ando@ansl.ntt.co.jp, Kagoshima, Kenichi2, Kondo, Akira1, Kubota, Shuji1
Source: IEEE Transactions on Antennas & Propagation. Aug2008 Part 2, Vol. 56 Issue 8, p2747-2751. 5p. 4 Diagrams, 5 Graphs.
Subjects: Electromagnetic fields, Microstrip antennas, Antennas (Electronics), Coaxial cables, Microwave antennas
Abstract: An enhanced microstrip antenna is proposed that incorporates a patch that rotates around the inner conductor of the coaxial line or dielectric shaft and a novel coaxial line feeding technique that offers constant electromagnetic coupling. This proposal addresses the disadvantages in our previous patch antenna in which the resonant frequency diverges from the center frequency of the personal handy-phone system (PHS) band and the bandwidth decreases as the patch rotates because of the changing electromagnetic coupling between the patch and microstrip line due to the patch rotation. We verify that this enhanced patch antenna achieves the antenna gain of approximately 0 dBd, which is the same as that of the previously proposed antenna, while suffering no significant gain degradation due to unit inclination over inclination angles from plusmn45deg compared to a conventional quarter-wavelength whip antenna, which experiences a degradation of approximately 2.7 dB. We show that the maximum resonant frequency separation from the center frequency of the PHS band is reduced to 15 MHz from 31.4 MHz of the previous antenna using the novel coaxial line feeding technique. The effective bandwidth needed for PHS is achieved over the inclination angles of -20deg to +40deg. Approximately 93% of the total bandwidth needed for PHS is achieved while the previous microstrip line type achieved only 58% coverage; accordingly, an adequate bandwidth for PHS use is obtained. [ABSTRACT FROM PUBLISHER]
Copyright of IEEE Transactions on Antennas & Propagation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 52173934
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Novel Microstrip Antenna With Rotatable Patch Fed by Coaxial Line for Personal Handy-Phone System Units.
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  Data: <searchLink fieldCode="AR" term="%22Ando%2C+Atsuya%22">Ando, Atsuya</searchLink><relatesTo>1</relatesTo><i> ando@ansl.ntt.co.jp</i><br /><searchLink fieldCode="AR" term="%22Kagoshima%2C+Kenichi%22">Kagoshima, Kenichi</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kondo%2C+Akira%22">Kondo, Akira</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kubota%2C+Shuji%22">Kubota, Shuji</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Antennas+%26+Propagation%22">IEEE Transactions on Antennas & Propagation</searchLink>. Aug2008 Part 2, Vol. 56 Issue 8, p2747-2751. 5p. 4 Diagrams, 5 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Electromagnetic+fields%22">Electromagnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Microstrip+antennas%22">Microstrip antennas</searchLink><br /><searchLink fieldCode="DE" term="%22Antennas+%28Electronics%29%22">Antennas (Electronics)</searchLink><br /><searchLink fieldCode="DE" term="%22Coaxial+cables%22">Coaxial cables</searchLink><br /><searchLink fieldCode="DE" term="%22Microwave+antennas%22">Microwave antennas</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: An enhanced microstrip antenna is proposed that incorporates a patch that rotates around the inner conductor of the coaxial line or dielectric shaft and a novel coaxial line feeding technique that offers constant electromagnetic coupling. This proposal addresses the disadvantages in our previous patch antenna in which the resonant frequency diverges from the center frequency of the personal handy-phone system (PHS) band and the bandwidth decreases as the patch rotates because of the changing electromagnetic coupling between the patch and microstrip line due to the patch rotation. We verify that this enhanced patch antenna achieves the antenna gain of approximately 0 dBd, which is the same as that of the previously proposed antenna, while suffering no significant gain degradation due to unit inclination over inclination angles from plusmn45deg compared to a conventional quarter-wavelength whip antenna, which experiences a degradation of approximately 2.7 dB. We show that the maximum resonant frequency separation from the center frequency of the PHS band is reduced to 15 MHz from 31.4 MHz of the previous antenna using the novel coaxial line feeding technique. The effective bandwidth needed for PHS is achieved over the inclination angles of -20deg to +40deg. Approximately 93% of the total bandwidth needed for PHS is achieved while the previous microstrip line type achieved only 58% coverage; accordingly, an adequate bandwidth for PHS use is obtained. [ABSTRACT FROM PUBLISHER]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Antennas & Propagation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1109/TAP.2008.927572
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 5
        StartPage: 2747
    Subjects:
      – SubjectFull: Electromagnetic fields
        Type: general
      – SubjectFull: Microstrip antennas
        Type: general
      – SubjectFull: Antennas (Electronics)
        Type: general
      – SubjectFull: Coaxial cables
        Type: general
      – SubjectFull: Microwave antennas
        Type: general
    Titles:
      – TitleFull: Novel Microstrip Antenna With Rotatable Patch Fed by Coaxial Line for Personal Handy-Phone System Units.
        Type: main
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            NameFull: Ando, Atsuya
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            NameFull: Kagoshima, Kenichi
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            NameFull: Kondo, Akira
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            NameFull: Kubota, Shuji
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            – D: 02
              M: 08
              Text: Aug2008 Part 2
              Type: published
              Y: 2008
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