Young-Ho Ryu
Samsung
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Publication
Featured researches published by Young-Ho Ryu.
international symposium on antennas and propagation | 2012
Ki Young Kim; Young-Ho Ryu; Eun-Seok Park; Keum-Su Song; Chi-Hyung Ahn
Misalignments between high-Q resonators for mid-range wireless power transfer is analyzed. Implanting a simple filament coil based mutual inductance to the well known power transfer efficiency formula, theoretical predictions have been well agreed with measurement results. Some interesting phenomena regarding the misalignments have been found and analyzed.
ieee antennas and propagation society international symposium | 2013
Ki Young Kim; Chi-Hyung Ahn; Keum-Su Song; Young-Ho Ryu; Jae Hyun Park; Eun-Seok Park; Yun-Kwon Park; Sang-wook Kwon
Magnetic resonance wireless power link including a non-coaxially aligned repeater resonator has been analyzed and designed for efficient mid-range wireless powering. Parametric study on the power transfer efficiency (PTE) for several meter distance range indoor powering has been made and optimization condition for maximum PTE have been obtained. The results are expected to be utilized for mid-range wireless powering in the presence of practical limitations of the resonator location.
ieee antennas and propagation society international symposium | 2013
Chi-Hyung Ahn; Ki Young Kim; Young-Ho Ryu; Keum-Su Song; Jae Hyun Park; Eun-Seok Park; Yun-Kwon Park; Sang-wook Kwon
A novel resonator structure for lateral-misalignment of wireless power transfer is presented. The proposed resonator is composed of a concentrated coil and several small loop coils. The uniform magnetic field distributions of the proposed resonator are described. The proposed hybrid resonator improves about 30% of the relative efficiency variation for a lateral-misalignment.
international conference on consumer electronics | 2013
Ki Young Kim; Changwook Yoon; Nam Yoon Kim; Jinsung Choi; Young-Ho Ryu; Dong-Zo Kim; Keum-Su Song; Chi-Hyung Ahn; Eun-Seok Park; Yun-Kwon Park; Sang-wook Kwon
Practical magnetic resonance wireless power transfer (WPT) system is presented. High-efficient power amplifier (PA) and adaptive tracking modules are combined with optimized wireless power links to propose mid-range wireless powering application scenarios in home-environments.
IEEE Transactions on Antennas and Propagation | 2015
Jae Hyun Park; Young-Ho Ryu; Byung-Chul Park; Jeong-Hae Lee
An inner-field guiding resonator (IFGR) is presented for efficient wireless power transmission (WPT) using resonant inductive coupling in proximity charging condition. The IFGR is inserted into a source resonator to obtain a uniform magnetic field distribution which is the important design factor of a proximity WPT system, because it makes the system simple without an adaptive matching technology. As the location of the target resonator changes, the transmission efficiencies are simulated and measured to validate uniform- and high-transmission efficiency. To optimize the WPT system using the IFGR, the design procedure is proposed. Considering the practical WPT system with ground plane, the proximity WPT system including one or two mobile devices was designed and fabricated. The average of the total efficiency at all positions on the source resonator was measured as 82.9% (one mobile device) and 87.1% (two mobile devices), respectively. These results prove that an efficient proximity WPT system can be successfully designed using the IFGR.
international conference on consumer electronics | 2013
Dong-Zo Kim; Ki Young Kim; Young-Ho Ryu; Nam Yoon Kim; Yun-Kwon Park; Sang-wook Kwon
Efficient wireless charging control scheme for powering a single device unit is presented. The proposed scheme uses in-band communication and analog circuits to control the clock signal lengths. Since it can generate the control data packets without MCU, it is easy to implement a one-chip of the RX parts. We have verified the performance of the in-band communication for the WPT system while a mobile device is in charging.
european microwave conference | 2012
Jinsung Choi; Young-Ho Ryu; Dong-Zo Kim; Nam Yoon Kim; Changwook Yoon; Yun-Kwon Park; Sang-wook Kwon; Youngoo Yang
european microwave conference | 2011
Jae-Hyun Park; Byung-Chul Park; Jeong-Hae Lee; Young-Ho Ryu; Eun-Seok Park; Sang-wook Kwon
european microwave conference | 2012
Nam Yoon Kim; Ki Young Kim; Young-Ho Ryu; Jinsung Choi; Dong-Zo Kim; Changwook Yoon; Yun-Kwon Park; Sang-wook Kwon
european microwave conference | 2012
Ki Young Kim; Young-Ho Ryu; Eun-Seok Park; Nam Yoon Kim; Jinsung Choi; Dong-Zo Kim; Changwook Yoon; Keum-Su Song; Chi-Hyung Ahn; Yun-Kwon Park; Sang-wook Kwon