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<p>This research paper introduces a quad port MIMO antenna significant for K-band and millimeter-wave applications, specifically for short-range communications, spanning a frequency range from 17.4 to 29.4&#xa0;GHz (with S<sub>11</sub> ≤ − 10&#xa0;dB). The frequency range of the K-band is 18–27&#xa0;GHz and the 5G communication band lies between 24 and 28&#xa0;GHz (mm-wave). The proposed frequency range validates these two applicable bands. The antenna's dimension is 10 × 10 × 0.8&#xa0;mm<sup>3</sup> (equivalent to 1.33λo × 1.33λo × 0.10λo) with a bandwidth of 51.06% and a remarkable peak radiation efficiency of 97%. Initially, a monopole antenna measuring 5 × 5 × 0.8&#xa0;mm<sup>3</sup>, employing a staircase half-ring ground structure was designed to operate within the desired frequency band. Subsequently, a quad-element MIMO antenna was developed by orienting each radiator perpendicular to each other, ensuring the isolation greater than 35&#xa0;dB. The enhancement in isolation is attributed to integrating a DGS structure at the ground plane. Various MIMO diversity performance metrics such as ECC, DG, TARC, MEG, CCL, and MIMO VSWR were also evaluated. The optimization process involved exploring different MIMO configurations and antenna sizes, culminating in a proposed MIMO antenna with a peak gain of 6.2&#xa0;dBi. Simulation and optimization were carried out using the HFSS 19 platform.</p>

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Design and analysis of quad port MIMO antenna for mm-wave and K-band applications using DGS

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • Amit Abhishek,
  • Priyadarshi Suraj

摘要

This research paper introduces a quad port MIMO antenna significant for K-band and millimeter-wave applications, specifically for short-range communications, spanning a frequency range from 17.4 to 29.4 GHz (with S11 ≤ − 10 dB). The frequency range of the K-band is 18–27 GHz and the 5G communication band lies between 24 and 28 GHz (mm-wave). The proposed frequency range validates these two applicable bands. The antenna's dimension is 10 × 10 × 0.8 mm3 (equivalent to 1.33λo × 1.33λo × 0.10λo) with a bandwidth of 51.06% and a remarkable peak radiation efficiency of 97%. Initially, a monopole antenna measuring 5 × 5 × 0.8 mm3, employing a staircase half-ring ground structure was designed to operate within the desired frequency band. Subsequently, a quad-element MIMO antenna was developed by orienting each radiator perpendicular to each other, ensuring the isolation greater than 35 dB. The enhancement in isolation is attributed to integrating a DGS structure at the ground plane. Various MIMO diversity performance metrics such as ECC, DG, TARC, MEG, CCL, and MIMO VSWR were also evaluated. The optimization process involved exploring different MIMO configurations and antenna sizes, culminating in a proposed MIMO antenna with a peak gain of 6.2 dBi. Simulation and optimization were carried out using the HFSS 19 platform.