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eess.SP2026
Transformer-Hypernetwork-Controlled Deep-Unfolded Phase-Aware Channel Estimation Refinement for Phase-Drift-Robust Backscatter Links
Hanyeol Ryu, Nohgyeom Ha, Sangkil Kim
This paper proposes a transformer-hypernetwork-controlled deep-unfolded phase-aware channel estimation refinement (THUNDER) for phase-drifting backscatter links. Residual carrier-p…
eess.SP2026
Ultra-low-power Monostatic Backscatter Platform with Phase-Aware Channel Estimation and System-Level Validation
Hanyeol Ryu, Sangkil Kim
This paper presents a novel channel-estimation (CE) method that mitigates residual phase drifts in backscatter links and a full hardware and signal-processing pipeline for a single…
eess.SP2025
Janus Metasurface Breaking Polarization Symmetry: Surface-Modulated Electromagnetic Wave Radiation with Coexistent Linear and Circular Polarization
Aparna Parameswaran, Hoyoung Kim, Sangkil Kim
In this work, a Janus metasurface based tensor impedance holographic antenna (JHA) is proposed that simultaneously radiates linearly polarized (LP) and circularly polarized (CP) be…