Institution
Kwangwoon University
Education•Seoul, South Korea•
About: Kwangwoon University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Thin film & Resonator. The organization has 4020 authors who have published 8217 publications receiving 104365 citations.
Topics: Thin film, Resonator, Adsorption, Dielectric, Orthogonal polynomials
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this article, the adsorption of sunscreen compounds (benzophene [BZP] and benzotriazole (BZT]) and widely known endocrine-disrupting compounds (bisphenol A [BPA] and 17 β-estradiol [E2]) was investigated using commercially available powdered activated carbon (PAC) and activated biochar produced in the laboratory.
67 citations
••
TL;DR: This work demonstrates a transmission of 4 x 10 Gb/s WDM channels over 1.2 km of free space in 1.55-microm band through a fiber-pigtailed collimator and enables the use of standard 100-GHz channel spacing and an optical preamplifier at the receiver.
Abstract: We demonstrate a transmission of 4×10 Gb/s WDM channels over 1.2 km of free space in 1.55-µm band. The transmitted beam is coupled into a single-mode fiber through a fiber-pigtailed collimator, which enables the use of standard 100-GHz channel spacing and an optical preamplifier at the receiver. All the received channels have Q values higher than 6.
67 citations
••
TL;DR: A smart, flexible, and stretchable multifunctional sensors-integrated wound bandage capable of assessing uric acid, pH, and temperature at the wound site and anticipate that this stretchable and flexible smart bandage could revolutionize wound care management and have profound impacts on the therapeutic outcomes.
67 citations
••
TL;DR: In this article, a dual Halbach magnet array was combined with a magnetically floated EH harvester to convert the mechanical energy of human-induced motion into electrical energy.
67 citations
••
TL;DR: A VCO frequency calibration technique suitable for a wideband fractional-N PLL that achieves a single-bit calibration time of only kTREF for obtaining a frequency resolution of fREF/k, and compared to the conventional techniques, which is the best performance in terms of the calibration time versus resolution.
Abstract: A VCO frequency calibration technique suitable for a wideband fractional-N PLL is presented. It provides a fast and high-precision search for an optimal discrete tuning curve of an LC VCO during the coarse tuning process in a fractional-N PLL. A high-speed frequency error detector (FED) converts the VCO frequency to a digital value and computes the exact frequency difference from a target frequency. A minimum error code finder finds an optimal code that is closest to the target frequency. Due to the pure digital domain operation, a ΔΣ modulator in PLL can be deactivated during the calibration process, which makes this technique fast and accurate especially for a ΔΣ fractional-N PLL. We achieve a single-bit calibration time of only kTREF for obtaining a frequency resolution of fREF/k, and compared to the conventional techniques, which is the best performance in terms of the calibration time versus resolution. Such fast VCO frequency calibration can greatly reduce the total lock time in a PLL. A 2.3-3.9 GHz fractional-N PLL employing the proposed calibration technique is implemented in 0.13 μm CMOS. Successful operation is verified through experimental results. The measured calibration time for a 6-bit capbank is 1.09 and 2.03 μs for a frequency resolution of 19.2 and 4.8 MHz, respectively.
67 citations
Authors
Showing all 4054 results
Name | H-index | Papers | Citations |
---|---|---|---|
Naresh Kumar | 66 | 1106 | 20786 |
Jae-Young Choi | 66 | 614 | 32855 |
Jae Youl Cho | 56 | 505 | 12012 |
Byong-Hun Jeon | 52 | 331 | 10092 |
Donghyun Kim | 51 | 612 | 9827 |
Kyo Han Ahn | 50 | 186 | 7334 |
Sung-Soo Kim | 49 | 465 | 10070 |
Taekyun Kim | 48 | 755 | 9838 |
Roozbeh Ghaffari | 48 | 143 | 13015 |
Eun Ha Choi | 47 | 585 | 9599 |
Younghun Kim | 43 | 276 | 8609 |
Jae Yeong Park | 43 | 333 | 6027 |
Glen A. Russell | 40 | 308 | 6845 |
Eun Woo Shin | 39 | 137 | 5289 |
Pankaj Attri | 38 | 130 | 4440 |