Compact and low mutual coupling 4 × 4 wideband MIMO antenna design for 5G millimeter-wave applications
Mohamed Edries, Hesham A. Mohamed, Dalia N. Elsheakh, Sherif Hekal
TL;DR
This paper introduces a compact, low-coupling MIMO antenna design for 5G millimeter-wave communication systems.
Contribution
The novel contribution is a 4 × 4 MIMO antenna system with reduced mutual coupling and high performance in the 24–32 GHz range.
Findings
The antenna achieves an 8 GHz impedance bandwidth with peak gain of 6 dBi at 27.5 GHz.
Mutual coupling levels reach −25 dB and −20 dB at 25 GHz and 29 GHz, respectively.
The design shows ECC < 0.001 and DG ~ 10 dB across the operational band.
Abstract
This paper presents a wideband 4 × 4 Multiple-Input-Multiple-Output (MIMO) antenna system operating within the 5G millimeter-wave (mmWave) Frequency Range 2 (FR2). The design targets enhanced mobile broadband (eMBB) applications and features four orthogonally arranged Greek cross-shaped slot antenna (GCSA) elements fed by microstrip lines to effectively reduce mutual coupling and ensure high isolation. Circular edges on the radiating elements are introduced to enhance the impedance bandwidth, while a strategically placed quadrilateral slot in the ground plane optimizes the radiation characteristics. The antenna is fabricated on a Rogers RT/Duroid 4003C substrate (εr = 3.55, thickness = 0.8 mm), resulting in a compact 40 × 40 × 0.8 mm3 structure. The proposed MIMO system achieves a measured impedance bandwidth of approximately 8 GHz, spanning 24 to 32 GHz at |S11|≤ − 10 dB, with a peak…
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Taxonomy
TopicsAntenna Design and Analysis · Millimeter-Wave Propagation and Modeling · Wireless Body Area Networks