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<p>In this paper, a compact frequency-tunable microstrip antenna based on MEMS technology is designed and simulated, featuring a wide frequency tuning range. The antenna incorporates a novel locking system that minimizes power consumption when the antenna is on or off. This locking mechanism consists of a linear micromotor driven by chevron-type electrothermal actuators, which operate at low voltage while providing sufficient displacement. From a microwave perspective, a frequency shift was achieved in the lower band from 14.6225&#xa0;GHz to 14.875&#xa0;GHz, and continuous, wide frequency tuning was observed in the higher band from 31&#xa0;GHz to 33.89&#xa0;GHz. Return losses (S11) remain below − 10 dB across the entire tuning range, and the electric field radiation pattern remains consistent at different operating frequencies, indicating good impedance matching and preserved antenna performance. The device design dimension and materials are such a way that the proposed antenna can be fabricated based on standard Metal MUMPS (Multi-User MEMS Process Technology) rules. The proposed structure was simulated for RF performance using HFSS software, and acceptable mechanical results were obtained using COMSOL software. The miniaturized design enables integration into modern wireless devices with limited space.</p>

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Design and optimization of a frequency-tunable reconfigurable microstrip patch antenna based on microelectromechanical systems

  • 期刊论文

  • 发表日期：

    2025年8月14日

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  • Azra Ghodrati,
  • Maryam Mirzalou,
  • Habib Badri Ghavifekr

摘要

In this paper, a compact frequency-tunable microstrip antenna based on MEMS technology is designed and simulated, featuring a wide frequency tuning range. The antenna incorporates a novel locking system that minimizes power consumption when the antenna is on or off. This locking mechanism consists of a linear micromotor driven by chevron-type electrothermal actuators, which operate at low voltage while providing sufficient displacement. From a microwave perspective, a frequency shift was achieved in the lower band from 14.6225 GHz to 14.875 GHz, and continuous, wide frequency tuning was observed in the higher band from 31 GHz to 33.89 GHz. Return losses (S11) remain below − 10 dB across the entire tuning range, and the electric field radiation pattern remains consistent at different operating frequencies, indicating good impedance matching and preserved antenna performance. The device design dimension and materials are such a way that the proposed antenna can be fabricated based on standard Metal MUMPS (Multi-User MEMS Process Technology) rules. The proposed structure was simulated for RF performance using HFSS software, and acceptable mechanical results were obtained using COMSOL software. The miniaturized design enables integration into modern wireless devices with limited space.