volume | PIER Journals

Abstract

Circularly polarized (CP) antennas minimize polarization losses and improve signal reliability in ultra-reliable and low-latency satellite communication. Compact design, wide impedance and axial ratio bandwidth (ARBW) are key requirements for circularly polarized antennas utilized for modern automotive wireless applications. In this work, a miniaturized slotted antenna for C-band automotive-oriented wireless applications is proposed. The antenna achieves a wide measured impedance bandwidth of 69.5% (4.0-8.26 GHz, 4.26 GHz) and exhibits an ARBW of 51% (4.96-8.33 GHz, 3.37 GHz). The overall compact size of 25 × 30 × 1.6 mm³ (0.33λ × 0.40λ × 0.02λ at 4 GHz) further underscores its suitability for integration in space-constrained C-band communication systems. The anticipated design is optimized using rigorous parametric analysis to achieve a wide ARBW from θ = -27˚ to +33˚ which is very beneficial for satellite applications. The fabricated prototype demonstrates a measured peak gain of 4.8 dBi and radiation efficiency ranging from 82% to 92% across the radiating band. Measurement results obtained from the fabricated antenna are validated with simulations and show satisfactory agreement. The anticipated design, when compared with existing literature, is found to outperform other designs in terms of size, ARBW, and impedance bandwidth. The achieved resonance in the proposed design can be utilized for satellite communication, medical and automotive applications (tele-operated driving support, high-definition map collecting and sharing, infrastructure-based teleoperated driving), and other applications in C-band.

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Mr. Sanjeev Sharma

Dr. Ashish Kumar

Dr. Rajeev Kumar

Dr. Nitin Kumar Saluja

Dr. Zahriladha Zakaria

Professor Ahmed Jamal Abdullah Al-Gburi