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<p>The current research presents a compact, novel hexa-band quad-patch MIMO antenna designed for 5G millimeter-wave (mmWave) systems. The antenna, measuring 52&#xa0;mm × 52&#xa0;mm, is built on a Rogers RT/duroid 5880 (tm) dielectric substrate with a relative permittivity of 2.2, thickness of 0.8&#xa0;mm, and dielectric loss tangent of 0.0009. The proposed antenna is made up of quad rectangular stepped extension slotted radiating elements (patches) on top of an 8-arm star-shape defected substrate and a plus shaped partial ground plane at the bottom. A microstrip line feed of 50 ohms is used to excite the radiating components. To enhance the isolation properties of MIMO antennas, optimized crossed stubs are employed as a decoupling structure between monopole radiators. The antenna generates six important frequency bands at 21.5&#xa0;GHz, 28&#xa0;GHz, 32&#xa0;GHz, 34.5&#xa0;GHz, 44&#xa0;GHz, and 49.5&#xa0;GHz with maximum reflection coefficient is -36 dB, and transmission coefficient (isolation) of greater than 22.5 dB throughout all bands. The developed antenna has a high peak gain of 10.73dBi, radiation efficiency of 98.3%, and consistent radiation patterns. Additionally, the antenna offers acceptable diversity gain of 10dB, mean effective gain of -3dB, total active reflection coefficient of &lt;-10dB, quite low ECC of &lt; 0.000001, and CC loss of 0.02 bits/s/Hz. The experiments that support the suggested work closely match the expected outcomes. In terms of gain, isolation, ECC, and straightforward design, the work that is being described is superior to other relevant works. These characteristics demonstrate the system’s suitability for 5G mm-wave systems.</p>

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A Novel Isolation-Enhanced Four-Element High-Gain Hexa-Band MIMO Antenna for 5G mmWave Systems

  • 期刊论文

  • 发表日期：

    2026年1月16日

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  • Tathababu Addepalli,
  • T. Vidyavathi,
  • M. Venkata Sudhakar,
  • Chandrasekhar Rao Jetti,
  • C. Kumara Narayana Swamy,
  • Sivasubramanyam Medasani,
  • Prasanthi Badugu,
  • Ahmed J. A. Al-Gburi

摘要

The current research presents a compact, novel hexa-band quad-patch MIMO antenna designed for 5G millimeter-wave (mmWave) systems. The antenna, measuring 52 mm × 52 mm, is built on a Rogers RT/duroid 5880 (tm) dielectric substrate with a relative permittivity of 2.2, thickness of 0.8 mm, and dielectric loss tangent of 0.0009. The proposed antenna is made up of quad rectangular stepped extension slotted radiating elements (patches) on top of an 8-arm star-shape defected substrate and a plus shaped partial ground plane at the bottom. A microstrip line feed of 50 ohms is used to excite the radiating components. To enhance the isolation properties of MIMO antennas, optimized crossed stubs are employed as a decoupling structure between monopole radiators. The antenna generates six important frequency bands at 21.5 GHz, 28 GHz, 32 GHz, 34.5 GHz, 44 GHz, and 49.5 GHz with maximum reflection coefficient is -36 dB, and transmission coefficient (isolation) of greater than 22.5 dB throughout all bands. The developed antenna has a high peak gain of 10.73dBi, radiation efficiency of 98.3%, and consistent radiation patterns. Additionally, the antenna offers acceptable diversity gain of 10dB, mean effective gain of -3dB, total active reflection coefficient of <-10dB, quite low ECC of < 0.000001, and CC loss of 0.02 bits/s/Hz. The experiments that support the suggested work closely match the expected outcomes. In terms of gain, isolation, ECC, and straightforward design, the work that is being described is superior to other relevant works. These characteristics demonstrate the system’s suitability for 5G mm-wave systems.