Broadband Microstrip Antenna Array Design for Wireless Communication in the 2.3–2.5 GHz Band
Kopbay K. Nurgaliyev M. Meirambekuly N. Saymbetov A. Bolatbek A. Zholamanov B. Koshkarbay N. Orynbassar S.
October 2025Engineered Science Publisher
Engineered Science
2025#37
This paper presents the design, simulation, and experimental validation of a planar broadband microstrip patch antenna array with passive beam tilt capability, optimized for operation in the 2.3–2.5 GHz ISM band. A 2×2 rectangular patch array was developed on a low-cost FR-4 substrate, employing a quarter-wave transformer (QWT)-based corporate feeding network with asymmetrical feedline lengths to introduce phase shifts. This configuration achieves a fixed downward beam tilt of approximately 30° without the use of active components or complex geometries. The fabricated antenna demonstrates a measured impedance bandwidth of 202 MHz (2.34–2.542 GHz), an S_11 parameter of approximately -20 dB, and a half-power beamwidth (HPBW) of 60° in the E-plane. Full-wave simulations in HFSS and outdoor experimental measurements confirm the intended radiation behavior and impedance characteristics. The proposed antenna design offers a compelling combination of bandwidth, gain, mechanical simplicity, and directional control, making it well-suited for industrial IoT nodes, ceiling-mounted access points, and wireless sensor networks.
2.4 GHz ISM band , Broadband antenna array , FR-4 substrate , Microstrip patch antenna , Passive beam tilt , Quarter-wave transformer
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Faculty of Physics and Technology, Al-Farabi Kazakh National University, 71 Al-Farabi, Almaty, 050040, Kazakhstan
Khoja Akhmet Yassawi International Kazakh-Turkish University, 29 Sattarhanov Street, Turkistan, 161200, Kazakhstan
Faculty of Physics and Technology
Khoja Akhmet Yassawi International Kazakh-Turkish University
10 лет помогаем публиковать статьи Международный издатель
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