A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar
To enhance the capability of a ground penetrating radar (GPR) in subsurface target identification and improve its polarization sensitivity in detecting underground linear objects, a circularly polarized broadband composite spiral antenna was designed. This antenna integrates equiangular spiral and A...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/6/1890 |
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| author | Hai Liu Shangyang Zhang Pei Wu Xu Meng Junyong Zhou Yanliang Du |
| author_facet | Hai Liu Shangyang Zhang Pei Wu Xu Meng Junyong Zhou Yanliang Du |
| author_sort | Hai Liu |
| collection | DOAJ |
| description | To enhance the capability of a ground penetrating radar (GPR) in subsurface target identification and improve its polarization sensitivity in detecting underground linear objects, a circularly polarized broadband composite spiral antenna was designed. This antenna integrates equiangular spiral and Archimedean spiral structures, achieving a wideband coverage of 1–5 GHz with stable circular polarization characteristics. The antenna employs an exponentially tapered microstrip balun for impedance matching and a metallic-backed cavity filled with absorbing materials to enhance its directivity. Experimental results demonstrate excellent radiation performance and stable circular polarization characteristics, with the axial ratio consistently below 3 dB throughout the operating frequency band, highlighting its suitability for polarimetric GPR systems. Furthermore, a 3D GPR measurement using the designed antenna validates its improved capacity for detecting subsurface linear objects, compared to the conventional linearly polarized bowtie antenna. |
| format | Article |
| id | doaj-art-d25a4a109a964dddbe08ac1a1a12a1cc |
| institution | DOAJ |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-d25a4a109a964dddbe08ac1a1a12a1cc2025-08-20T02:43:07ZengMDPI AGSensors1424-82202025-03-01256189010.3390/s25061890A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating RadarHai Liu0Shangyang Zhang1Pei Wu2Xu Meng3Junyong Zhou4Yanliang Du5School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518061, ChinaTo enhance the capability of a ground penetrating radar (GPR) in subsurface target identification and improve its polarization sensitivity in detecting underground linear objects, a circularly polarized broadband composite spiral antenna was designed. This antenna integrates equiangular spiral and Archimedean spiral structures, achieving a wideband coverage of 1–5 GHz with stable circular polarization characteristics. The antenna employs an exponentially tapered microstrip balun for impedance matching and a metallic-backed cavity filled with absorbing materials to enhance its directivity. Experimental results demonstrate excellent radiation performance and stable circular polarization characteristics, with the axial ratio consistently below 3 dB throughout the operating frequency band, highlighting its suitability for polarimetric GPR systems. Furthermore, a 3D GPR measurement using the designed antenna validates its improved capacity for detecting subsurface linear objects, compared to the conventional linearly polarized bowtie antenna.https://www.mdpi.com/1424-8220/25/6/1890ground penetrating radar (GPR)spiral antennabroadbandcircular polarizationaxial ratio |
| spellingShingle | Hai Liu Shangyang Zhang Pei Wu Xu Meng Junyong Zhou Yanliang Du A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar Sensors ground penetrating radar (GPR) spiral antenna broadband circular polarization axial ratio |
| title | A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar |
| title_full | A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar |
| title_fullStr | A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar |
| title_full_unstemmed | A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar |
| title_short | A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar |
| title_sort | circularly polarized broadband composite spiral antenna for ground penetrating radar |
| topic | ground penetrating radar (GPR) spiral antenna broadband circular polarization axial ratio |
| url | https://www.mdpi.com/1424-8220/25/6/1890 |
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