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Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna

Hisamatsu Nakano, Tomoki Abe, Toru Kawano, Amit Mehta Orcid Logo, Junji Yamauchi

IEEE Access, Volume: 7, Pages: 78289 - 78297

Swansea University Author: Amit Mehta Orcid Logo

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DOI (Published version): 10.1109/ACCESS.2019.2921452

Abstract

A two-arm metaspiral antenna is presented, where the feeding voltage sources are expressed using excitation amplitude r and deviation angle δ . This excitation is decomposed into the odd mode and even mode components. The odd mode component forms a circularly polarized (CP) axial beam and the even m...

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Published in: IEEE Access
ISSN: 2169-3536
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa51089
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fullrecord <?xml version="1.0"?><rfc1807><datestamp>2019-07-15T10:16:07.6747796</datestamp><bib-version>v2</bib-version><id>51089</id><entry>2019-07-15</entry><title>Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna</title><swanseaauthors><author><sid>8a1e5679707cf437cbfd17b72514b8a5</sid><ORCID>0000-0001-8073-2436</ORCID><firstname>Amit</firstname><surname>Mehta</surname><name>Amit Mehta</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2019-07-15</date><deptcode>EEEG</deptcode><abstract>A two-arm metaspiral antenna is presented, where the feeding voltage sources are expressed using excitation amplitude r and deviation angle &#x3B4; . This excitation is decomposed into the odd mode and even mode components. The odd mode component forms a circularly polarized (CP) axial beam and the even mode component forms a CP conical beam, whose maximum intensity is off the antenna axis. Superimposing the conical beam onto the axial beam forms a reduced radiation region in the elevation plane. The reduced radiation region is used for minimizing transmission in a particular &#x3D5;FBD direction or the rejection of interference signals from the &#x3D5;FBD direction. This paper presents a formula that estimates the azimuth angle of the reduced radiation region. The formula features the excitation mode ratio, m , and the mode phase difference, &#x394;&#x3A6; . The formulated azimuth angle is validated by showing good agreement with the simulated azimuth angle obtained by searching for a null over the 3D radiation pattern. The formula is simple and hence supersedes the time-consuming 3D null search.</abstract><type>Journal Article</type><journal>IEEE Access</journal><volume>7</volume><paginationStart>78289</paginationStart><paginationEnd>78297</paginationEnd><publisher/><issnElectronic>2169-3536</issnElectronic><keywords/><publishedDay>31</publishedDay><publishedMonth>12</publishedMonth><publishedYear>2019</publishedYear><publishedDate>2019-12-31</publishedDate><doi>10.1109/ACCESS.2019.2921452</doi><url/><notes/><college>COLLEGE NANME</college><department>Electronic and Electrical Engineering</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>EEEG</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2019-07-15T10:16:07.6747796</lastEdited><Created>2019-07-15T10:10:46.7246733</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering</level></path><authors><author><firstname>Hisamatsu</firstname><surname>Nakano</surname><order>1</order></author><author><firstname>Tomoki</firstname><surname>Abe</surname><order>2</order></author><author><firstname>Toru</firstname><surname>Kawano</surname><order>3</order></author><author><firstname>Amit</firstname><surname>Mehta</surname><orcid>0000-0001-8073-2436</orcid><order>4</order></author><author><firstname>Junji</firstname><surname>Yamauchi</surname><order>5</order></author></authors><documents><document><filename>0051089-15072019101559.pdf</filename><originalFilename>nakano2019.pdf</originalFilename><uploaded>2019-07-15T10:15:59.8070000</uploaded><type>Output</type><contentLength>9149812</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><embargoDate>2019-07-15T00:00:00.0000000</embargoDate><copyrightCorrect>false</copyrightCorrect><language>eng</language></document></documents><OutputDurs/></rfc1807>
spelling 2019-07-15T10:16:07.6747796 v2 51089 2019-07-15 Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna 8a1e5679707cf437cbfd17b72514b8a5 0000-0001-8073-2436 Amit Mehta Amit Mehta true false 2019-07-15 EEEG A two-arm metaspiral antenna is presented, where the feeding voltage sources are expressed using excitation amplitude r and deviation angle δ . This excitation is decomposed into the odd mode and even mode components. The odd mode component forms a circularly polarized (CP) axial beam and the even mode component forms a CP conical beam, whose maximum intensity is off the antenna axis. Superimposing the conical beam onto the axial beam forms a reduced radiation region in the elevation plane. The reduced radiation region is used for minimizing transmission in a particular ϕFBD direction or the rejection of interference signals from the ϕFBD direction. This paper presents a formula that estimates the azimuth angle of the reduced radiation region. The formula features the excitation mode ratio, m , and the mode phase difference, ΔΦ . The formulated azimuth angle is validated by showing good agreement with the simulated azimuth angle obtained by searching for a null over the 3D radiation pattern. The formula is simple and hence supersedes the time-consuming 3D null search. Journal Article IEEE Access 7 78289 78297 2169-3536 31 12 2019 2019-12-31 10.1109/ACCESS.2019.2921452 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2019-07-15T10:16:07.6747796 2019-07-15T10:10:46.7246733 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering Hisamatsu Nakano 1 Tomoki Abe 2 Toru Kawano 3 Amit Mehta 0000-0001-8073-2436 4 Junji Yamauchi 5 0051089-15072019101559.pdf nakano2019.pdf 2019-07-15T10:15:59.8070000 Output 9149812 application/pdf Version of Record true 2019-07-15T00:00:00.0000000 false eng
title Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
spellingShingle Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
Amit Mehta
title_short Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
title_full Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
title_fullStr Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
title_full_unstemmed Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
title_sort Azimuth Angle Estimation for a Reduced Radiation Region Formed by a Metaspiral Antenna
author_id_str_mv 8a1e5679707cf437cbfd17b72514b8a5
author_id_fullname_str_mv 8a1e5679707cf437cbfd17b72514b8a5_***_Amit Mehta
author Amit Mehta
author2 Hisamatsu Nakano
Tomoki Abe
Toru Kawano
Amit Mehta
Junji Yamauchi
format Journal article
container_title IEEE Access
container_volume 7
container_start_page 78289
publishDate 2019
institution Swansea University
issn 2169-3536
doi_str_mv 10.1109/ACCESS.2019.2921452
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Electronic and Electrical Engineering
document_store_str 1
active_str 0
description A two-arm metaspiral antenna is presented, where the feeding voltage sources are expressed using excitation amplitude r and deviation angle δ . This excitation is decomposed into the odd mode and even mode components. The odd mode component forms a circularly polarized (CP) axial beam and the even mode component forms a CP conical beam, whose maximum intensity is off the antenna axis. Superimposing the conical beam onto the axial beam forms a reduced radiation region in the elevation plane. The reduced radiation region is used for minimizing transmission in a particular ϕFBD direction or the rejection of interference signals from the ϕFBD direction. This paper presents a formula that estimates the azimuth angle of the reduced radiation region. The formula features the excitation mode ratio, m , and the mode phase difference, ΔΦ . The formulated azimuth angle is validated by showing good agreement with the simulated azimuth angle obtained by searching for a null over the 3D radiation pattern. The formula is simple and hence supersedes the time-consuming 3D null search.
published_date 2019-12-31T04:02:51Z
_version_ 1763753246192566272
score 11.035655

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