Compact microstrip antennas with very wide ARBW and triple circularly polarized bands |
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| Authors: | Shobhit Saxena Binod K Kanaujia Santanu Dwari Sachin Kumar Rahul Tiwari |
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| Affiliation: | 1. Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India;2. School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Delhi, India;3. Department of Electronics & Communication Engineering, SRM University, Chennai, Tamil Nadu, India;4. Department of Electronics & Communication Engineering, Faculty of Technology (SCRIET), CCS University, Meerut, Uttar Pradesh, India |
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| Abstract: | This article presents two compact circularly polarized microstrip antennas with a very wide 3 dB axial ratio bandwidth and triple circularly polarized bands. A hexagonal stub (circular polarization element) along with tuning element in the ground plane is used for achieving wide 3 dB ARBW in antenna‐1, while a novel approach of using a parasitic strip around the circular polarization element is used in antenna‐2 for introducing band elimination notches in the circularly polarized band of antenna‐1. The antenna‐1 has a ?10 dB impedance bandwidth of 12.34% (3.8‐4.3 GHz), 84.02% (4.9‐12 GHz), and 3 dB ARBW of 79.94% (4.9‐10.9 GHz). The antenna‐2 displays circularly polarized band elimination notch characteristics with ?10 dB impedance bandwidth of 24.80% (3.85‐4.94 GHz), 31.72% (6.1‐8.4 GHz), 25.35% (9.3‐12 GHz), and 3 dB ARBW of 4.84% (4.63‐4.86 GHz), 19.08% (6.02‐7.29 GHz), and 5.7% (9.54‐10.1 GHz). Both the antennas are designed and fabricated on FR4 substrate of dimension (0.52 × 0.52 × 0.04)λ0 at a frequency of 7.9 GHz. |
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| Keywords: | ARBW circularly polarized notch wideband |
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