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In this paper, a square-ring antenna using 2D square array defected ground structures (DGS) is proposed for the 5G wireless communications frequency band (3.4–3.8 GHz). The antenna is designed on FR-4 substrate with a thickness of 1.6 mm and operates at 3.5 GHz frequency, the fundamental mode (TM \(_{11}\) ), suitable for 5G wireless communication applications. The feeding mechanism of the radiator is composed of a T-shaped stub connected to a microstrip line in such a way to achieve impedance matching by proximity coupling. From the simulated results and relative to the conventional square-ring antenna’s gain, the antenna using a \(5\times 5\) array of DGS sees an increase in its gain of about 2.728 dBi and suppression of the second and third-order harmonics at 7.5 GHz and 9.6 GHz, respectively.

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Gain Enhancement and WideBand Harmonic Suppression in Square-Ring Antenna Using Defected Ground Structures for 5G Wireless Communications

  • 会议论文

  • 发表日期：

    2025年

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  • Nabil Dakhli,
  • Fethi Choubani

摘要

In this paper, a square-ring antenna using 2D square array defected ground structures (DGS) is proposed for the 5G wireless communications frequency band (3.4–3.8 GHz). The antenna is designed on FR-4 substrate with a thickness of 1.6 mm and operates at 3.5 GHz frequency, the fundamental mode (TM \(_{11}\) ), suitable for 5G wireless communication applications. The feeding mechanism of the radiator is composed of a T-shaped stub connected to a microstrip line in such a way to achieve impedance matching by proximity coupling. From the simulated results and relative to the conventional square-ring antenna’s gain, the antenna using a \(5\times 5\) array of DGS sees an increase in its gain of about 2.728 dBi and suppression of the second and third-order harmonics at 7.5 GHz and 9.6 GHz, respectively.