Conception and realization of a wideband directional dual-beam phased MIMO array antenna with hybrid coupler for ISM band utilizations

El Ansari, Abdelaaziz and Al Gburi, Ahmed Jamal Abdullah and Khandare, Shobhit K. and El Idrissi, Najiba El Amrani and Bendali, Abdelhak and Das, Sudipta and Youni, Fatima and Abduljaleel, Hala K. (2025) Conception and realization of a wideband directional dual-beam phased MIMO array antenna with hybrid coupler for ISM band utilizations. Progress In Electromagnetics Research M, 132. pp. 39-48. ISSN 1937-8726

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Abstract

This work addresses a wideband dual-beam 1×4 phased MIMO array antenna with a hybrid coupler for Industrial, Scientific and Medical (ISM) bands applications at 2.4–2.5 GHz. We engineered, refined, and reduced the fundamental component utilizing the novel concept of an advanced curved quarter-wave impedance adapter, achieving a 50% reduction in size relative to comparable designs documented in the literature. The fundamental component operates at 2.45 GHz, including a narrow bandwidth of 26 MHz and a maximum gain of 7.21 dB. Subsequently, a lossless magic-T power splitter is employed to feed two identical miniaturized elements resulting in a compact 1 × 2 array antenna with miniaturized size and enhanced performance. The obtained results show that the miniaturized 1 × 2 array antenna resonates at 2.45 GHz with a narrow impedance bandwidth of 52 MHz, peak gain of 9.41 dB, and peak directivity of 9.48 dB at 2.45 GHz. To broaden the narrow bandwidth and enhance gain directivity and radiation coverage area, a 3 dB hybrid coupler is used to feed two identical miniaturized 1×2 array antennas resulting a wideband directional dual-beam MIMO phased 1×4 array antenna. The proposed dual-beam array antenna prototype has been designed and fabricated on a substrate Rogers RT/duroid 5880 with the following parameters: relative permittivity εr = 2.2, dielectric loss tangent of 0.0009, and total size of 240 × 136 × 1.56 mm3. The simulation results are corroborated by experiments that verified the proposed dual-beam MIMO array antenna which exhibits a high gain of 11.2 dB, effective adaptation, an expanded bandwidth of 1.22 GHz, in addition to its MIMO capability and the dual beams oriented at ±30◦, achieved through switching between the two input feed ports of the hybrid coupler.

Item Type:	Article
Uncontrolled Keywords:	Antenna feeders, Computer testing, Dielectric losses, Directive antennas, Microstrip antennas, Voltage dividers
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	23 Feb 2026 03:03
Last Modified:	23 Feb 2026 03:03
URI:	http://eprints.utem.edu.my/id/eprint/29498
Statistic Details:	View Download Statistic

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