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This paper presents a Minkowski fractal monopole antenna that has S11 values of −22.5 dB at 4 GHz, −31.09 dB at 6.8 GHz, and −14.9 at 8.41 GHz. The fractal technique is used to miniaturize the radiator, and the defective ground structure technique is used to obtain the wideband. A microstrip feedline is considered to achieve impedance matching the substrate used in the design, FR4, which has a permittivity of 4.4. The suggested design’s overall measurements are 30 × 20 × 1.6 mm. The proposed radiator’s achieved operating frequency ranges from 3.52 GHz to 8.72 GHz and the achieved impedance bandwidth is 85%. This monopole has a VSWR of 1.16 at 4 GHz. The proposed structure obtains a gain that is positive over the whole operating frequency range. The achieved realized peak gain is 5.27 dBi at 8.61 GHz. To conclude, this proposed candidate is beneficial for S, C, and applications.

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A Minkowski Fractal Antenna for S, C, Band Applications Based on Defected Ground Structure

  • 会议论文

  • 发表日期：

    2025年

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  • Prasannajeet Mohanty,
  • Subhasish Pandav,
  • Santanu Kumar Behera

摘要

This paper presents a Minkowski fractal monopole antenna that has S11 values of −22.5 dB at 4 GHz, −31.09 dB at 6.8 GHz, and −14.9 at 8.41 GHz. The fractal technique is used to miniaturize the radiator, and the defective ground structure technique is used to obtain the wideband. A microstrip feedline is considered to achieve impedance matching the substrate used in the design, FR4, which has a permittivity of 4.4. The suggested design’s overall measurements are 30 × 20 × 1.6 mm. The proposed radiator’s achieved operating frequency ranges from 3.52 GHz to 8.72 GHz and the achieved impedance bandwidth is 85%. This monopole has a VSWR of 1.16 at 4 GHz. The proposed structure obtains a gain that is positive over the whole operating frequency range. The achieved realized peak gain is 5.27 dBi at 8.61 GHz. To conclude, this proposed candidate is beneficial for S, C, and applications.