Diversity Performance Analysis of Two Parallel Dipole Antennas Mounted on a Small Metal Body.
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| Title: | Diversity Performance Analysis of Two Parallel Dipole Antennas Mounted on a Small Metal Body. |
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| Authors: | Tsunekawa, Koichi1, Kagoshima, Kenichi1 |
| Source: | Electronics & Communications in Japan, Part 1: Communications. Oct93, Vol. 76 Issue 10, p80-90. 11p. |
| Subjects: | Data transmission systems, Mobile communication systems, Dipole antennas, Cell phones, Wireless communications, Digital communications, Telecommunication |
| Abstract: | Diversity technology is an effective means to improve the transmission quality in mobile communications. Hence, some portable telephones are equipped with diversity antennas. However no detailed analysis has been carried out. The reason for the low correlation coefficient of such antennas in experiments has not been clarified quantitatively. In this paper, the diversity antenna is assumed to be made of two half-wave dipole antennas placed in parallel on a small transceiver with a rectangular shape, and its correlation coefficient and efficiency characteristics are analyzed by the method of moments using wire grid models. It is found that the correlation coefficient of 0.23 and the efficiency including the mismatch loss is -2.7 dB even for an antenna element spacing of 0.1 wavelength. Thus a sufficient diversity effect can be obtained on a small transceiver. Specifically, the reason for the low correlation coefficient is studied by separating the mutual coupling between the antenna elements and the effect of the metal body. The relationship between the incoming wave profile and the correlation coefficient is presented. It is shown that the correlation coefficient never exceeds 0.6 in an ordinary operating condition and that the correlation coefficient can be made almost 0 if the load impedance of the parasitic antenna element is chosen appropriately. [ABSTRACT FROM AUTHOR] |
| Copyright of Electronics & Communications in Japan, Part 1: Communications is the property of Wiley-Blackwell 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 |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 14045793 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Diversity Performance Analysis of Two Parallel Dipole Antennas Mounted on a Small Metal Body. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tsunekawa%2C+Koichi%22">Tsunekawa, Koichi</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kagoshima%2C+Kenichi%22">Kagoshima, Kenichi</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Electronics+%26+Communications+in+Japan%2C+Part+1%3A+Communications%22">Electronics & Communications in Japan, Part 1: Communications</searchLink>. Oct93, Vol. 76 Issue 10, p80-90. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Data+transmission+systems%22">Data transmission systems</searchLink><br /><searchLink fieldCode="DE" term="%22Mobile+communication+systems%22">Mobile communication systems</searchLink><br /><searchLink fieldCode="DE" term="%22Dipole+antennas%22">Dipole antennas</searchLink><br /><searchLink fieldCode="DE" term="%22Cell+phones%22">Cell phones</searchLink><br /><searchLink fieldCode="DE" term="%22Wireless+communications%22">Wireless communications</searchLink><br /><searchLink fieldCode="DE" term="%22Digital+communications%22">Digital communications</searchLink><br /><searchLink fieldCode="DE" term="%22Telecommunication%22">Telecommunication</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Diversity technology is an effective means to improve the transmission quality in mobile communications. Hence, some portable telephones are equipped with diversity antennas. However no detailed analysis has been carried out. The reason for the low correlation coefficient of such antennas in experiments has not been clarified quantitatively. In this paper, the diversity antenna is assumed to be made of two half-wave dipole antennas placed in parallel on a small transceiver with a rectangular shape, and its correlation coefficient and efficiency characteristics are analyzed by the method of moments using wire grid models. It is found that the correlation coefficient of 0.23 and the efficiency including the mismatch loss is -2.7 dB even for an antenna element spacing of 0.1 wavelength. Thus a sufficient diversity effect can be obtained on a small transceiver. Specifically, the reason for the low correlation coefficient is studied by separating the mutual coupling between the antenna elements and the effect of the metal body. The relationship between the incoming wave profile and the correlation coefficient is presented. It is shown that the correlation coefficient never exceeds 0.6 in an ordinary operating condition and that the correlation coefficient can be made almost 0 if the load impedance of the parasitic antenna element is chosen appropriately. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Electronics & Communications in Japan, Part 1: Communications is the property of Wiley-Blackwell 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: 10.1002/ecja.4410761008 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 80 Subjects: – SubjectFull: Data transmission systems Type: general – SubjectFull: Mobile communication systems Type: general – SubjectFull: Dipole antennas Type: general – SubjectFull: Cell phones Type: general – SubjectFull: Wireless communications Type: general – SubjectFull: Digital communications Type: general – SubjectFull: Telecommunication Type: general Titles: – TitleFull: Diversity Performance Analysis of Two Parallel Dipole Antennas Mounted on a Small Metal Body. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tsunekawa, Koichi – PersonEntity: Name: NameFull: Kagoshima, Kenichi IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct93 Type: published Y: 1993 Identifiers: – Type: issn-print Value: 87566621 Numbering: – Type: volume Value: 76 – Type: issue Value: 10 Titles: – TitleFull: Electronics & Communications in Japan, Part 1: Communications Type: main |
| ResultId | 1 |
