Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna
A plasma sheath enveloping a reentry vehicle would cause the failure of on-board antennas, which is an important effect that contributes to the “blackout” problem. The method of replacing the on-board single antenna with the array antennas and using beamforming technology has been proposed to mitiga...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2015/542392 |
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| author | B. W. Bai X. P. Li Y. M. Liu J. Xu |
| author_facet | B. W. Bai X. P. Li Y. M. Liu J. Xu |
| author_sort | B. W. Bai |
| collection | DOAJ |
| description | A plasma sheath enveloping a reentry vehicle would cause the failure of on-board antennas, which is an important effect that contributes to the “blackout” problem. The method of replacing the on-board single antenna with the array antennas and using beamforming technology has been proposed to mitigate “blackout” problem by many other researchers. Because the plasma sheath is a reflective medium, plasma will alter the mutual coupling between array elements and degrade the beamforming performance of array antenna. In this paper, the effects of the plasma sheath on the mutual coupling properties between adjacent array elements are studied utilizing the algorithm of finite integration technique. Results show that mutual coupling coefficients of array elements are deteriorating more seriously with the decrease of collision frequency. Moreover, when electron density and collision frequency are both large, plasma sheath improves the mutual coupling property of array elements; this conclusion suggests that replacing the on-board single antenna with the array antennas and using beamforming technology can be adopted to mitigate the blackout problem in this condition. |
| format | Article |
| id | doaj-art-192d4912ab45466fbc99408b1b5ef1c2 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-192d4912ab45466fbc99408b1b5ef1c22025-02-03T06:00:51ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772015-01-01201510.1155/2015/542392542392Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array AntennaB. W. Bai0X. P. Li1Y. M. Liu2J. Xu3School of Aerospace Science and Technology, Xidian University, Xi’an, Shaanxi 710071, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an, Shaanxi 710071, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an, Shaanxi 710071, ChinaSchool of Electronic Engineering, Xidian University, Xi’an, Shaanxi 710071, ChinaA plasma sheath enveloping a reentry vehicle would cause the failure of on-board antennas, which is an important effect that contributes to the “blackout” problem. The method of replacing the on-board single antenna with the array antennas and using beamforming technology has been proposed to mitigate “blackout” problem by many other researchers. Because the plasma sheath is a reflective medium, plasma will alter the mutual coupling between array elements and degrade the beamforming performance of array antenna. In this paper, the effects of the plasma sheath on the mutual coupling properties between adjacent array elements are studied utilizing the algorithm of finite integration technique. Results show that mutual coupling coefficients of array elements are deteriorating more seriously with the decrease of collision frequency. Moreover, when electron density and collision frequency are both large, plasma sheath improves the mutual coupling property of array elements; this conclusion suggests that replacing the on-board single antenna with the array antennas and using beamforming technology can be adopted to mitigate the blackout problem in this condition.http://dx.doi.org/10.1155/2015/542392 |
| spellingShingle | B. W. Bai X. P. Li Y. M. Liu J. Xu Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna International Journal of Antennas and Propagation |
| title | Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna |
| title_full | Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna |
| title_fullStr | Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna |
| title_full_unstemmed | Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna |
| title_short | Effects of Reentry Plasma Sheath on Mutual-Coupling Property of Array Antenna |
| title_sort | effects of reentry plasma sheath on mutual coupling property of array antenna |
| url | http://dx.doi.org/10.1155/2015/542392 |
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