A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application
The substrate-integrated coaxial line (SICL) is a potential transmission line due to its good characteristics of high efficiency, nondispersive, and single operational mode. A tapered slot SICL balun is proposed, which can realize the impedance transformation from the microstrip line to the coplanar...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2020/7148969 |
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| author | Xiaochun Liu Li Wang Mingxi Zhang Shaobin Liu Guiqiang Du |
| author_facet | Xiaochun Liu Li Wang Mingxi Zhang Shaobin Liu Guiqiang Du |
| author_sort | Xiaochun Liu |
| collection | DOAJ |
| description | The substrate-integrated coaxial line (SICL) is a potential transmission line due to its good characteristics of high efficiency, nondispersive, and single operational mode. A tapered slot SICL balun is proposed, which can realize the impedance transformation from the microstrip line to the coplanar strip line (CPS). At the same time, the proposed balun can transform the quasi-TEM mode of the microstrip line to the TEM mode of CPS. A printed dipole radiator is designed and is fed by the proposed SICL balun to achieve the impedance matching. The dual-polarized radiation mode is realized by employing two orthogonal printed dipoles. For each polarization radiator, the CPS is bended to avoided the occlusion of two polarization ports and realize the direct assembling of two orthogonal printed circuits. What is more, the assembling method is advantageous to improve the port isolation degree and decrease the cross polarization level. To improve the ratio of front to back (F/B) of the radiation pattern, a cylindrical metal cavity is adopted. According to the results of simulation and experiments, the VSWR of each port is lower than 2, the isolation degree between two polarization ports is higher than 20 dB, and the cross polarization level at the boresight is lower than −20 dB at the operational frequency. The patterns of two ports are almost symmetric, and high radiation efficiency is obtained. The experimental results of the principle prototype verify the design schemes of the balun and the dual-polarized antenna. The proposed dual-polarized antenna fed by the tapered slot SICL balun is suitable for the airborne radar application. |
| format | Article |
| id | doaj-art-83a76f785cfb4f41b014bde13aabf950 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-83a76f785cfb4f41b014bde13aabf9502025-02-03T06:05:37ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772020-01-01202010.1155/2020/71489697148969A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar ApplicationXiaochun Liu0Li Wang1Mingxi Zhang2Shaobin Liu3Guiqiang Du4College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, ChinaSchool of Information Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, ChinaCollege of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, ChinaThe Aeronautical Science Key Laboratory for High Performance Electromagnetic Windows, Jinan 250023, ChinaSchool of Space Science and Physics, Shandong University, Weihai 264209, ChinaThe substrate-integrated coaxial line (SICL) is a potential transmission line due to its good characteristics of high efficiency, nondispersive, and single operational mode. A tapered slot SICL balun is proposed, which can realize the impedance transformation from the microstrip line to the coplanar strip line (CPS). At the same time, the proposed balun can transform the quasi-TEM mode of the microstrip line to the TEM mode of CPS. A printed dipole radiator is designed and is fed by the proposed SICL balun to achieve the impedance matching. The dual-polarized radiation mode is realized by employing two orthogonal printed dipoles. For each polarization radiator, the CPS is bended to avoided the occlusion of two polarization ports and realize the direct assembling of two orthogonal printed circuits. What is more, the assembling method is advantageous to improve the port isolation degree and decrease the cross polarization level. To improve the ratio of front to back (F/B) of the radiation pattern, a cylindrical metal cavity is adopted. According to the results of simulation and experiments, the VSWR of each port is lower than 2, the isolation degree between two polarization ports is higher than 20 dB, and the cross polarization level at the boresight is lower than −20 dB at the operational frequency. The patterns of two ports are almost symmetric, and high radiation efficiency is obtained. The experimental results of the principle prototype verify the design schemes of the balun and the dual-polarized antenna. The proposed dual-polarized antenna fed by the tapered slot SICL balun is suitable for the airborne radar application.http://dx.doi.org/10.1155/2020/7148969 |
| spellingShingle | Xiaochun Liu Li Wang Mingxi Zhang Shaobin Liu Guiqiang Du A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application International Journal of Antennas and Propagation |
| title | A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application |
| title_full | A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application |
| title_fullStr | A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application |
| title_full_unstemmed | A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application |
| title_short | A Dual-Polarized Printed Antenna Based on a Tapered Slot SICL Balun for Airborne Radar Application |
| title_sort | dual polarized printed antenna based on a tapered slot sicl balun for airborne radar application |
| url | http://dx.doi.org/10.1155/2020/7148969 |
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