Sequentially rotated loop and spiral antenna arrays with a coplanar C‐figured feedline

Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane. It is found that a loop...

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Veröffentlicht in:Electronics letters Jg. 59; H. 22
Hauptverfasser: Hirose, Kazuhide, Tsubouchi, Susumu, Ito, Naonoshin, Urushibata, Yuya, Nakano, Hisamatsu
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Stevenage John Wiley & Sons, Inc 01.11.2023
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Abstract Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane. It is found that a loop element array has a 3 dB axial ratio bandwidth of 30%, 3.3 times as wide as that of an isolated loop without an array environment. In contrast, a spiral element array shows a 3 dB gain drop bandwidth of 62% (72% for the axial ratio bandwidth, wider than that of an isolated spiral by a factor of 3.0). Almost the same factors of 3.0 and 3.3 for the spiral and loop element arrays are then compared with those in similar studies. It is found that factors are classified into three groups by feedline types. The simulated results are verified by experimental work. Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane.
AbstractList Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane. It is found that a loop element array has a 3 dB axial ratio bandwidth of 30%, 3.3 times as wide as that of an isolated loop without an array environment. In contrast, a spiral element array shows a 3 dB gain drop bandwidth of 62% (72% for the axial ratio bandwidth, wider than that of an isolated spiral by a factor of 3.0). Almost the same factors of 3.0 and 3.3 for the spiral and loop element arrays are then compared with those in similar studies. It is found that factors are classified into three groups by feedline types. The simulated results are verified by experimental work. Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane.
Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane. It is found that a loop element array has a 3 dB axial ratio bandwidth of 30%, 3.3 times as wide as that of an isolated loop without an array environment. In contrast, a spiral element array shows a 3 dB gain drop bandwidth of 62% (72% for the axial ratio bandwidth, wider than that of an isolated spiral by a factor of 3.0). Almost the same factors of 3.0 and 3.3 for the spiral and loop element arrays are then compared with those in similar studies. It is found that factors are classified into three groups by feedline types. The simulated results are verified by experimental work.
Abstract Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array comprises four elements sequentially rotated by 90° and excited by a coplanar C‐figured feedline above the ground plane. It is found that a loop element array has a 3 dB axial ratio bandwidth of 30%, 3.3 times as wide as that of an isolated loop without an array environment. In contrast, a spiral element array shows a 3 dB gain drop bandwidth of 62% (72% for the axial ratio bandwidth, wider than that of an isolated spiral by a factor of 3.0). Almost the same factors of 3.0 and 3.3 for the spiral and loop element arrays are then compared with those in similar studies. It is found that factors are classified into three groups by feedline types. The simulated results are verified by experimental work.
Author Ito, Naonoshin
Urushibata, Yuya
Hirose, Kazuhide
Nakano, Hisamatsu
Tsubouchi, Susumu
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  givenname: Kazuhide
  orcidid: 0000-0002-9994-9106
  surname: Hirose
  fullname: Hirose, Kazuhide
  email: khirose@sic.shibaura-it.ac.jp
  organization: College of Engineering, Shibaura Institute of Technology
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  givenname: Susumu
  surname: Tsubouchi
  fullname: Tsubouchi, Susumu
  organization: College of Engineering, Shibaura Institute of Technology
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  surname: Ito
  fullname: Ito, Naonoshin
  organization: College of Engineering, Shibaura Institute of Technology
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  surname: Urushibata
  fullname: Urushibata, Yuya
  organization: College of Engineering, Shibaura Institute of Technology
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  givenname: Hisamatsu
  orcidid: 0000-0002-5559-1771
  surname: Nakano
  fullname: Nakano, Hisamatsu
  organization: Graduate School of Science and Engineering, Science and Engineering, Hosei University
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Snippet Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each array...
Abstract Using the moment method, two array antennas are investigated to reveal the effects of different radiation elements on the array characteristics. Each...
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SubjectTerms Antenna arrays
Antennas
Arrays
Bandwidths
Ground plane
Radiation
Spiral antennas
Wire
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Title Sequentially rotated loop and spiral antenna arrays with a coplanar C‐figured feedline
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