Graduate Student
Affiliation: AEL (PI: Sangwook Nam) & WFL (PI: Jungsuek Oh) at Seoul National University (jointly advised)
[P5] Calibration Verification and Accuracy Improvement of Ultra-Large-Scale Digital Array Antennas
Organization: LIG Nex1
Period: 2026.04 — 2028.12
Keywords: Space Surveillance Radar, Ultra-Large-Scale Digital Array Antenna, Fixed Probe Calibration, Phase Center Compensation, Beam Pattern Modeling
- Developed calibration and verification algorithms for ultra-large-scale digital array antennas (86,400+ elements) used in space surveillance radar, addressing major error sources (probe phase center offset, polarization misalignment, position-dependent element beam patterns, 3D probe position uncertainty, and radome-induced channel distortion).
- Designed an AI-integrated calibration verification simulator enabling independent and combined sensitivity analysis of error sources, providing quantitative performance evaluation and optimal calibration strategies for field-deployed large-aperture phased array systems.
[P4] Large-Area Wireless Power Transfer System for Power Gateway Application
Organization: Samsung Electronics A-Lab
Period: 2023.09 — 2024.02
Keywords: RF-Wireless Power Transfer, Large Array Calibration, Beam Collection Efficiency, Near-Field Focusing, High-Power Scalable Array
- Scaled up the LUT-based calibration and LCSPD architecture to a 1024-element (32×32) transmitter and 256-element (16×16) receiver array operating at 5.64 GHz for power gateway applications.
- Designed and validated high-power WPT system operation exceeding 100 W transmitted power, demonstrating the scalability of the proposed calibration and series power divider methodology.
[P3] High-Efficiency BCE 2D Array RF System Based on Time Reversal
Organization: Samsung Electronics A-Lab
Period: 2023.03 — 2023.08
Keywords: RF-Wireless Power Transfer, Array Calibration, Beam Collection Efficiency, Near-Field Focusing, Scalable Array Design
- Proposed an LUT-based calibration and complexity reduction method for a scalable 256-element transmitter array in RF wireless power transfer systems, enabling accurate beam collection efficiency (BCE) estimation using only a single input connection and a fixed reference antenna.
- Designed a loss compensated series power divider (LCSPD) for scalable RF signal distribution and demonstrated 71.9% BCE at 0.5 m with 6.08 W transmitted and 4.37 W received power at 5.64 GHz, validated through convex-optimized near-field focusing experiments.
[P2] Wireless Power Transfer Using Massive MIMO Microwave with Hybrid Beamforming
Organization: Samsung DS
Period: 2023.03 — 2023.09
Keywords: Feedback based algorithms, RF-Wireless Power Transfer, Array antenna, RF System
- Received power feedback based RF-WPT optimization algorithm.
[P1] Wireless Power Transfer System Design
Organization: Samsung Research (SR)
Period: 2021.08 — 2022.07
Keywords: RF-Wireless Power Transfer, Array antenna, mmWave antenna, RF System, Link-budget
- Design and fabrication of mmWave large array transmitter antenna (@24 GHz, 32×32).