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<p>This paper introduces an innovative microstrip-fed printed antenna designed for Wireless Local Area Network (WLAN) and Vehicle-to-Everything (V2X) applications, highlighting its ability to emit circularly polarized radiation across a wide bandwidth. The proposed CP antenna, constructed on a rounded square FR-4 substrate, incorporates key radiators such as an E-shape and inverted-L shaped strip, two octagonal rings, and a T-shape defected ground structure (DGS). These radiators collectively contribute to a substantial 10 dB impedance bandwidth (ZBW) spanning sub 6&#xa0;GHz N79, WLAN, and V2X bands, along with a 3 dB axial ratio bandwidth (ARBW) across WLAN and V2X operational bands. With a compact form factor boasting electrical dimensions of 0.57λc × 0.49λc and a substrate thickness of 0.015 λc (where λc is a resonating free space wavelength at 5.70&#xa0;GHz), the proposed CP antenna underwent fabrication and testing. The measured results exhibit a 10 dB ZBW of 39.85% (4.28–6.41&#xa0;GHz), a 3 dB ARBW of 18.69% (5.14–6.20&#xa0;GHz), and broadside far-field patterns. The antenna demonstrates a peak measured gain and efficiency 3.45 dBi and 74.88%, respectively, across the designated operating band. Furthermore, to validate the performance of antenna for V2X application, the investigation of antenna at 5.70&#xa0;GHz was carried by installing it on the roof of the car. It was observed that a peak gain of 4.70 dBi was achieved ensuring a good signal strength for V2X communication. With these characteristics, the proposed antenna emerges as a promising solution for applications in sub 6&#xa0;GHz N79, WLAN, and V2X communication.</p>

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Circularly Polarized Rounded Rectangle Antenna Tailored for Sub 6 GHz, WLAN, and V2X Applications with an Innovative T-Shaped Ground Structure

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Jayshri Kulkarni,
  • Neeta Kulkarni

摘要

This paper introduces an innovative microstrip-fed printed antenna designed for Wireless Local Area Network (WLAN) and Vehicle-to-Everything (V2X) applications, highlighting its ability to emit circularly polarized radiation across a wide bandwidth. The proposed CP antenna, constructed on a rounded square FR-4 substrate, incorporates key radiators such as an E-shape and inverted-L shaped strip, two octagonal rings, and a T-shape defected ground structure (DGS). These radiators collectively contribute to a substantial 10 dB impedance bandwidth (ZBW) spanning sub 6 GHz N79, WLAN, and V2X bands, along with a 3 dB axial ratio bandwidth (ARBW) across WLAN and V2X operational bands. With a compact form factor boasting electrical dimensions of 0.57λc × 0.49λc and a substrate thickness of 0.015 λc (where λc is a resonating free space wavelength at 5.70 GHz), the proposed CP antenna underwent fabrication and testing. The measured results exhibit a 10 dB ZBW of 39.85% (4.28–6.41 GHz), a 3 dB ARBW of 18.69% (5.14–6.20 GHz), and broadside far-field patterns. The antenna demonstrates a peak measured gain and efficiency 3.45 dBi and 74.88%, respectively, across the designated operating band. Furthermore, to validate the performance of antenna for V2X application, the investigation of antenna at 5.70 GHz was carried by installing it on the roof of the car. It was observed that a peak gain of 4.70 dBi was achieved ensuring a good signal strength for V2X communication. With these characteristics, the proposed antenna emerges as a promising solution for applications in sub 6 GHz N79, WLAN, and V2X communication.