Compact microstrip antennas with very wide ARBW and triple circularly polarized bands. Issue 1 (15th August 2017)

• Record Type: Journal Article
• Authors: Saxena, Shobhit; Kanaujia, Binod K.; Dwari, Santanu; Kumar, Sachin; Tiwari, Rahul
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 28:Issue 1(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-08-15
• Subjects: ARBW -- circularly polarized -- notch -- wideband; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21162
• Languages: English
• ISSNs: 1096-4290

Abstract

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.