A Circularly Polarized Broadband Composite Spiral Antenna for Ground Penetrating Radar
Hai Liu, Shangyang Zhang, Pei Wu, Xu Meng, Junyong Zhou, Yanliang Du
TL;DR
A new spiral antenna improves ground-penetrating radar's ability to detect underground objects by using circular polarization and wideband performance.
Contribution
A novel composite spiral antenna design combining equiangular and Archimedean spirals for enhanced GPR performance is introduced.
Findings
The antenna achieves 1–5 GHz wideband coverage with stable circular polarization.
Axial ratio remains below 3 dB across the frequency band, ensuring good polarization performance.
3D GPR measurements show improved detection of subsurface linear objects compared to conventional antennas.
Abstract
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…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsGeophysical Methods and Applications · Microwave Imaging and Scattering Analysis · Antenna Design and Analysis