Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R
In this study, a dual-mode waveguide circularly polarized antenna for TC&R (telemetry, command, and ranging) was proposed for the communication between a low-orbit satellite and a ground station. The proposed antenna required both a wide −10 dB bandwidth and axial ratio bandwidth of 7.1–7.3 GHz...
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| Format: | Article |
| Language: | English |
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The Korean Institute of Electromagnetic Engineering and Science
2023-09-01
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| Series: | Journal of Electromagnetic Engineering and Science |
| Subjects: | |
| Online Access: | https://www.jees.kr/upload/pdf/jees-2023-5-r-183.pdf |
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| author | Dong-Su Choi Yoon-Seon Choi Hyo-Jin Lee Sun-Ik Lee Jong-Myung Woo |
| author_facet | Dong-Su Choi Yoon-Seon Choi Hyo-Jin Lee Sun-Ik Lee Jong-Myung Woo |
| author_sort | Dong-Su Choi |
| collection | DOAJ |
| description | In this study, a dual-mode waveguide circularly polarized antenna for TC&R (telemetry, command, and ranging) was proposed for the communication between a low-orbit satellite and a ground station. The proposed antenna required both a wide −10 dB bandwidth and axial ratio bandwidth of 7.1–7.3 GHz and 8.0–8.4 GHz. The antenna was designed with a stepped septum inside a square waveguide to obtain circular polarization and the axial ratio wide bandwidth. Next, a dual-mode synthesis method was adopted for link budgeting by combining square and circular waveguides. The requirement was that the co-polarization level with a symmetric −3 dB beamwidth of 39° must be −5 dBic or higher at ±76.5°, and the cross-polarization level must average −15 dBic or lower at ±76.5°. Finally, the corrugate structure attached to the outside of the extended circular waveguide was offset in multiple steps to suppress the back lobe of the cross-polarization As a result, the axial ratio maintained an average of 1.8 dB at 0° within each band of the required frequency. In addition, the co-polarization obtained an average of −4.52 dBic in the 7.2 GHz band and −5.31 dBic in the 8.2 GHz band at ±76.5°. Finally, in the case of the cross-polarization pattern, the back lobe level was suppressed by 9.89 dB at 7.2 GHz by the corrugate structure, and an average value of −19.9 dBic or less was obtained at ±76.5°. The proposed antenna was confirmed to be effective as a Korean low-orbit satellite TC&R antenna with a radiation pattern of a symmetric beamwidth. |
| first_indexed | 2024-03-11T16:44:56Z |
| format | Article |
| id | doaj.art-157ccedd745c476b9b41dd806ff41b8d |
| institution | Directory Open Access Journal |
| issn | 2671-7255 2671-7263 |
| language | English |
| last_indexed | 2024-03-11T16:44:56Z |
| publishDate | 2023-09-01 |
| publisher | The Korean Institute of Electromagnetic Engineering and Science |
| record_format | Article |
| series | Journal of Electromagnetic Engineering and Science |
| spelling | doaj.art-157ccedd745c476b9b41dd806ff41b8d2023-10-23T01:18:19ZengThe Korean Institute of Electromagnetic Engineering and ScienceJournal of Electromagnetic Engineering and Science2671-72552671-72632023-09-0123539840410.26866/jees.2023.5.r.1833616Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&RDong-Su Choi0Yoon-Seon Choi1Hyo-Jin Lee2Sun-Ik Lee3Jong-Myung Woo4 Department of Radio and Information Communication Engineering, Chungnam National University, Daejeon, Korea Department of Radio and Information Communication Engineering, Chungnam National University, Daejeon, Korea Department of Radio and Information Communication Engineering, Chungnam National University, Daejeon, Korea Department of Satellite Research Directorate at Korea Aerospace Research Institute, Daejeon, Korea Department of Radio and Information Communication Engineering, Chungnam National University, Daejeon, KoreaIn this study, a dual-mode waveguide circularly polarized antenna for TC&R (telemetry, command, and ranging) was proposed for the communication between a low-orbit satellite and a ground station. The proposed antenna required both a wide −10 dB bandwidth and axial ratio bandwidth of 7.1–7.3 GHz and 8.0–8.4 GHz. The antenna was designed with a stepped septum inside a square waveguide to obtain circular polarization and the axial ratio wide bandwidth. Next, a dual-mode synthesis method was adopted for link budgeting by combining square and circular waveguides. The requirement was that the co-polarization level with a symmetric −3 dB beamwidth of 39° must be −5 dBic or higher at ±76.5°, and the cross-polarization level must average −15 dBic or lower at ±76.5°. Finally, the corrugate structure attached to the outside of the extended circular waveguide was offset in multiple steps to suppress the back lobe of the cross-polarization As a result, the axial ratio maintained an average of 1.8 dB at 0° within each band of the required frequency. In addition, the co-polarization obtained an average of −4.52 dBic in the 7.2 GHz band and −5.31 dBic in the 8.2 GHz band at ±76.5°. Finally, in the case of the cross-polarization pattern, the back lobe level was suppressed by 9.89 dB at 7.2 GHz by the corrugate structure, and an average value of −19.9 dBic or less was obtained at ±76.5°. The proposed antenna was confirmed to be effective as a Korean low-orbit satellite TC&R antenna with a radiation pattern of a symmetric beamwidth.https://www.jees.kr/upload/pdf/jees-2023-5-r-183.pdfcircular polarizationdual-mode waveguidelow earth orbitseptumx-band antenna |
| spellingShingle | Dong-Su Choi Yoon-Seon Choi Hyo-Jin Lee Sun-Ik Lee Jong-Myung Woo Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R Journal of Electromagnetic Engineering and Science circular polarization dual-mode waveguide low earth orbit septum x-band antenna |
| title | Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R |
| title_full | Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R |
| title_fullStr | Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R |
| title_full_unstemmed | Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R |
| title_short | Design of a Dual-Mode Waveguide CP Antenna with a Symmetric Beamwidth Using Short Stub for Low-Orbit Satellite TC&R |
| title_sort | design of a dual mode waveguide cp antenna with a symmetric beamwidth using short stub for low orbit satellite tc r |
| topic | circular polarization dual-mode waveguide low earth orbit septum x-band antenna |
| url | https://www.jees.kr/upload/pdf/jees-2023-5-r-183.pdf |
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