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<p>High-speed and low-loss compact antennas are in great demand due to their requirement in high-performance wireless communication systems. This paper presents a compact circularly polarized rectangular microstrip patch antenna for triple-band applications in the frequency band of the sub-8&#xa0;GHz (3.1–7.6&#xa0;GHz) range. The electrical length of the antenna is 0.64<i>λ</i> × 0.54<i>λ</i> × 0.02<i>λ</i>, where <i>λ</i> is the free space wavelength at the first lower frequency (<i>@</i>3.1&#xa0;GHz). The simulated and measured results are compared in this scope, and both the results agree with the fractional bandwidth (below −10&#xa0;dB) of 30.5% (3.1–4.2&#xa0;GHz <i>@</i> 3.6&#xa0;GHz), 19.6% (4.9–5.9&#xa0;GHz <i>@</i> 5.1&#xa0;GHz), and 17% (6.4–7.6&#xa0;GHz <i>@</i> 7.2&#xa0;GHz) at the sub-6&#xa0;GHz 5G, WLAN, and Wi-Fi 6E band. Maximum isolation of 35&#xa0;dB is observed at the 5G and WLAN bands and 22&#xa0;dB at the 6E band with a peak gain of 6.15 dBi. The horizontal and vertical spacing between the edges of the horizontal and vertical patches are 0.12<i>λ</i> and 0.14<i>λ</i>, respectively. Furthermore, an envelope correlation coefficient (ECC) &lt; 0.006, diversity gain (DG) &gt; 9.99&#xa0;dB, group delay &lt; 0.4&#xa0;ns, and maximum radiation efficiency of 98% provide an excellent trade-off among the antenna parameters in the working band along with the 13%ARBW (&lt; 3&#xa0;dB) in the 5G (3.1–3.6&#xa0;GHz <i>@</i> 3.2&#xa0;GHz) and Wi-Fi 6E band. The quasi-omnidirectional radiation pattern makes it a suitable candidate for operation in 5G broadband and next-generation Wi-Fi 6E services.</p>

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Compact Multiband MIMO Antenna for Sub-6 GHz 5G Applications

  • 期刊论文

  • 发表日期：

    2025年1月1日

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  • Sourav Bhattacharyya,
  • Aritra Bhowmik,
  • Karunamoy Chatterjee

摘要

High-speed and low-loss compact antennas are in great demand due to their requirement in high-performance wireless communication systems. This paper presents a compact circularly polarized rectangular microstrip patch antenna for triple-band applications in the frequency band of the sub-8 GHz (3.1–7.6 GHz) range. The electrical length of the antenna is 0.64λ × 0.54λ × 0.02λ, where λ is the free space wavelength at the first lower frequency (@3.1 GHz). The simulated and measured results are compared in this scope, and both the results agree with the fractional bandwidth (below −10 dB) of 30.5% (3.1–4.2 GHz @ 3.6 GHz), 19.6% (4.9–5.9 GHz @ 5.1 GHz), and 17% (6.4–7.6 GHz @ 7.2 GHz) at the sub-6 GHz 5G, WLAN, and Wi-Fi 6E band. Maximum isolation of 35 dB is observed at the 5G and WLAN bands and 22 dB at the 6E band with a peak gain of 6.15 dBi. The horizontal and vertical spacing between the edges of the horizontal and vertical patches are 0.12λ and 0.14λ, respectively. Furthermore, an envelope correlation coefficient (ECC) < 0.006, diversity gain (DG) > 9.99 dB, group delay < 0.4 ns, and maximum radiation efficiency of 98% provide an excellent trade-off among the antenna parameters in the working band along with the 13%ARBW (< 3 dB) in the 5G (3.1–3.6 GHz @ 3.2 GHz) and Wi-Fi 6E band. The quasi-omnidirectional radiation pattern makes it a suitable candidate for operation in 5G broadband and next-generation Wi-Fi 6E services.