volume | PIER Journals

Abstract

This study presents a compact frequency-selective metasurface for transmissive and reflective polarization conversion over the V-band (40-65 GHz). The structure consists of two Rogers RO4003C substrates separated by a 0.2-mm air gap and interconnected by a metallic post to enhance electromagnetic coupling. We performed parametric optimization to obtain multiple polarization-conversion bands. The optimized unit cell has a periodicity of 3.9 mm and employs resonator dimensions of L₁ = 2.6 mm, L₂ = 2.1 mm, W = 1.0 mm, S = 0.3 mm, H = 0.2 mm, and D = 0.3 mm. We conducted full-wave simulations and free-space measurements using WR-19 horn antennas and a vector network analyzer for validation. The proposed structure exhibits frequency-selective polarization-conversion behavior, with the transmission conversion exceeding 90% over approximately 40-49 GHz and near-unity conversion at selected frequencies, while the reflection conversion approaches 100% at resonant frequencies of approximately 58 and 60.5 GHz. The fabricated prototype showed good agreement with simulations, with minor discrepancies attributed to fabrication and measurement uncertainties. The proposed structure is promising for millimeter-wave communications, intelligent electromagnetic surfaces, radar sensing, transmitarray antennas, and future 6G systems.

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Prof. Mudrik Alaydrus

Dr. Defi Lestari

Dr. Said Attamimi

Dr. Umaisaroh