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<p>A 2-bit reconfigurable microstrip antenna capable of selectively switching its operating frequency and polarization is presented. The design features a novel dual-embedded, crossed-slot topology where slots on the radiating patch and the ground plane are controlled independently by two p-i-n diodes. This 2-bit control scheme facilitates four distinct operational states. When the diodes are in identical states (ON/ON or OFF/OFF), the antenna exhibits linear polarization at two discrete resonant frequencies, 2.51&#xa0;GHz and 2.44&#xa0;GHz. When the diodes are in opposing states (ON/OFF or OFF/ON), the antenna radiates with left-handed (LHCP) or right-handed circular polarization (RHCP) at 2.45&#xa0;GHz. A prototype was fabricated and measured, with results showing excellent correlation with simulations. This compact, single-layer design demonstrates a versatile and efficient solution with high functional density for modern wireless systems requiring agile beam control.</p>

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2-Bit reconfigurable microstrip antenna with independently controlled hybrid slots for polarization and frequency switching

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月11日

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  • Dong-Hyo Lee,
  • Jaeung Han,
  • Durk-Jong Park,
  • Seongmin Pyo

摘要

A 2-bit reconfigurable microstrip antenna capable of selectively switching its operating frequency and polarization is presented. The design features a novel dual-embedded, crossed-slot topology where slots on the radiating patch and the ground plane are controlled independently by two p-i-n diodes. This 2-bit control scheme facilitates four distinct operational states. When the diodes are in identical states (ON/ON or OFF/OFF), the antenna exhibits linear polarization at two discrete resonant frequencies, 2.51 GHz and 2.44 GHz. When the diodes are in opposing states (ON/OFF or OFF/ON), the antenna radiates with left-handed (LHCP) or right-handed circular polarization (RHCP) at 2.45 GHz. A prototype was fabricated and measured, with results showing excellent correlation with simulations. This compact, single-layer design demonstrates a versatile and efficient solution with high functional density for modern wireless systems requiring agile beam control.