volume | PIER Journals

Abstract

A compact Ultra-Wideband (UWB) Multiple-Input Multiple-Output (MIMO) antenna with a culturally inspired radiating structure is developed in this study. The radiating element is inspired by the traditional gonjong shape of Minangkabau architecture, which resembles upward-curving buffalo horns, forming a distinctive roof-like patch that enhances the impedance characteristics. A 50-ohm microstrip line is used to excite the patch, with a partial ground plane placed beneath the patch. To improve bandwidth and support low-frequency operation, an L-shaped strip is introduced on the ground plane, and the patch is optimized through edge modification and parametric analysis. The antenna achieves a wide measured impedance bandwidth of 2.2-20 GHz (S₁₁ < -10 dB), fully covering and extending beyond the Federal Communications Commission (FCC)-defined UWB range. High isolation is achieved with S₁₂ consistently below -20 dB across the band. Excellent MIMO performance is demonstrated with an envelope correlation coefficient (ECC) below 0.01, diversity gain (DG) above 9.95 dB, channel capacity loss (CCL) lower than 0.4 bit/s/Hz, and Total Active Reflection Coefficient (TARC) below -10 dB. The antenna also exhibits stable radiation patterns and maintains high efficiency throughout the operating band. With overall dimensions of just 30 × 30 mm², the developed antenna is more compact than most recent UWB MIMO designs, making it highly suitable for modern wireless communication systems requiring wide bandwidth and reliable multi-antenna performance.

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Dr. Firdaus Firdaus

Dr. Rahmadi Kurnia

Prof. Ikhwana Elfitri