Kwangwoon University

Ultra-Sensitive Battery-Free Wireless Humidity Sensor for Real-Time Diaper Monitoring

Abstract Wearable healthcare systems require humidity sensors that integrate exceptional sensitivity with robust environmental stability and biocompatible materials. However, most reported sensors exhibit compromised response kinetics at high sensitivity. Here, we report a high-p...

Lambda-deformed pascal matrices: Operator deformation, conditioning stabilization, and structural properties

We introduce a one-parameter deformation of the classical Pascal matrix based on a rationally modified lowering operator acting on the λ -rising-factorial basis. The resulting matrices preserve a Pascal-type lower-triangular structure while exhibiting substantially improved condi...

A 2.4-GHz Bluetooth CMOS RF Transceiver with Improved On-Chip TX/RX Matching and Switching Circuit

This paper presents a fully integrated 2.4-GHz Bluetooth radio frequency (RF) transceiver featuring an area-efficient on-chip RF input/output (RFIO) circuit implemented in a 65-nm CMOS process. The proposed single-ended RFIO, sharing a single antenna pin for both T/R paths, elimi...

Impact of Source Contact Segmentation on the Electrical Characteristics of 4H‐SiC Planar MOSFETs

Source contact (SC) segmentation is investigated as a layout approach for tuning the capacitance, conduction, blocking, and switching characteristics of 1.7 kV 4H‐silicon carbide (4H‐SiC) planar metal‐oxide‐semiconductor field‐effect transistors (MOSFETs). Three‐dimensional TCAD...

Dual‐Metasurface‐Integrated Fiber Array for Bidirectional Cylindrical‐Vector‐Beam Multiplexed Communication Using Off‐Axis Spatial Manipulation

ABSTRACT Free‐space optical (FSO) communication is expected to support 6G networks, and cylindrical vector beam (CVB) multiplexing offers a promising space‐division multiplexing (SDM) dimension for high‐capacity FSO links. However, conventional CVB generators offer limited bidire...