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Updated: Jan 8, 2026

Design and Characterization Methodology for Efficient Wide Range Tunable MEMS Filters
Published on: February 4, 2018
2-Bit reconfigurable microstrip antenna with independently controlled hybrid slots for polarization and frequency
Dong-Hyo Lee1, Jaeung Han1, Durk-Jong Park1
1Korea Aerospace Research Institute, National Satellite Operation & Application Center, Daejeon, 34133, Korea.
Abstract:
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.
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