[1] | Hyo Rim Bae, Choon Sik Cho, and Jae W. Lee, "Efficiency Enhanced Class-E Power Amplifier Using the Second Harmonic Injection at the Feedback Loop," IEEE European Microwave Conference, pp. 1042-1045, Sept. 2010. |
[2] | Seung Yoon Yang, Choon Sik Cho and Jae W. Lee, "Sub-THz Printed Log-Periodic Dipole Array Antenna for Enhanced Bandwidth and High Gain," IEEE European Microwave Conference, pp. 1349-1352, Sept. 2010. |
[3] | Hyo Rim Bae, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A 24GHz Dual-Gate Mixer Using Sub-Harmonic in 0.18μm CMOS Technology," IEEE Asia Pacific Microwave Conference, Dec. 2009. |
[4] | Ji Hoon Jeong, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Novel K-Band Self-Oscillating Mixer Based on Push-Push Topology," IEEE Asia Pacific Microwave Conference, Dec. 2009. |
[5] | Sun Young Kim, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "A Novel Feedback Low Phase Noise Ka-band Push-Push CMOS VCO," IEEE Asia Pacific Microwave Conference, Dec. 2009. |
[6] | Sang-Ki Eun, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Low Power VCO Using Active Inductor for Low Phase Noise and Wide Tuning Range," IEEE European Microwave Conference, pp. 125-128, Sept. 2009. |
[7] | Tae Yoon Seo, Jae W. Lee, Choon Sik Cho, and Taek K. Lee "An Embedded Filtering Antenna Using Multiple Layers with Dielectric Lens," IEEE European Microwave Conference, pp. 751-754, Sept. 2009. |
[8] | Tak Su Moon, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Novel Millimeter Wave Super Lens Using Split-Ring Resonator and Complementary Split-Ring Resonator," Proceedings of IRMMW-THz, Sept. 2009. |
[9] | Seung Yoon Yang, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "Design of Sub-THz Log-Periodic Antenna for High Input Impedance," Proceedings of IRMMW-THz, Sept. 2009. |
[10] | Soon One So, Sang-Ki Eun , Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Dumbbell U-Slot Wide Band Antenna Using Radial Stub Feeding for Millimeter-Wave Application," Proceedings of IRMMW-THz, Sept. 2009. |
[11] | Cheong Won Ryu, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Low Power 45dB Dynamic-Range Variable Gain Mixer in 0.18μm CMOS," IEEE International Microwave Symposium, pp. 585-588, June 2009. |
[12] | Woosung Lee, Jaeheung Kim, Choon Sik Cho, and Young Joong Yoon, "A 60 GHz Rotman Lens on a Silicon Wafer for System-on-a-Chip and System-in-Package Applications," IEEE International Microwave Symposium, pp. 1189-1192, June 2009. |
[13] | Sun Young Kim, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "A Novel Feedback Phase Noise CMOS Voltage Controlled Oscillator," Korea-Japan Microwave Conference, pp. 45-48, Apr. 2009. |
[14] | Jin-Gul Lee , Choon Sik Cho , Jae W. Lee, Sang-Ki Eun, "A Novel Dual-Band Wilkinson Power Divider Using Branch-line," IEEE Asia Pacific Microwave Conference, Dec. 2008. |
[15] | Tak Su Moon, Choon Sik Cho, Jae W. Lee, and Young Ho Jung, "Adaptive Digital Predistortion for The Power Amplifiers Based on Look-up Table with Tanh as a Nonlinear Indexing Function," IEEE Asia Pacific Microwave Conference, Dec. 2008. |
[16] | Daehan Kim, Choon Sik Cho, Jae W. Lee, Jaeheung Kim, "A Dual Band Radial Stub Antenna with Tapered Radial Slot on Backside," IEEE Asia Pacific Microwave Conference, Dec. 2008. |
[17] | Cheong Won Ryu, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "A Triple-Folded Frequency Push-Push Oscillator Using DGS Resonator and Composite Right/Left-Handed Transmission Lines," IEEE Asia Pacific Microwave Conference, Dec. 2008. |
[18] | Dong-yeon Kim, Jae W. Lee, Choon Sik Cho, and Yeon-Choon Chung, "Alternative Investigation of Common-Mode Radiated Emission from PCB with a Bent Signal Line and Attached Cables," IEEE Asia Pacific Microwave Conference, Dec. 2008. |
[19] | Sang-Ki Eun, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "Linearity Enhancement for the RF Class-E Power Amplifiers Using Duty-Cycle Modulation at the Feed-Forward Path," IEEE European Microwave Conference, pp. 1675-1678, Oct. 2008. |
[20] | Kyu Seok Hwang,Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "High Quality-Factor and Inductance of Symmetric Differential-Pair Structure Active Inductor Using a Feedback Resistance Design," IEEE International Microwave Symposium, pp.1059-1062, June 2008. |
[21] | Sung-Hwan Ahn, Jae W. Lee, Choon Sik Cho, and Taek K. Lee, "A Wilkinson Power Divider with Different Power Ratios at Different Frequencies," IEEE Asia Pacific Microwave Conference, pp. 781-784, Dec. 2007. |
[22] | Dong-Yeon Kim, Jae W. Lee, Choon Sik Cho, and Taek K. Lee, "Time-Domain Signal Investigations of Notched VHDMA for UWB Communications," IEEE Asia Pacific Microwave Conference, pp. 1201-1204, Dec. 2007. |
[23] | Jinse Jung, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "An Ultra Wide Band pHEMT Low Noise Amplifier With Darlington Stage," International SOC Conference, pp. 568-570, Nov. 2007. |
[24] | Sang-Ki Eun, Seung Hun Ji, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "A High Linearity Chireix Outphasing Power Amplifier Using Composite Right/Left-Handed Transmission Lines," IEEE European Microwave Conference, pp. 1622-1625, Oct. 2007. |
[25] | Cheong Won Ryu, Choon Sik Cho, Jae W. Lee, and Jaeheung Kim, "New Balanced Self Oscillating Mixer Using DGS Resonator," IEEE European Microwave Conference, pp. 648-651, Oct. 2007. |
[26] | Woon-Gi Yeo, Tae-Yoon Seo, Jae W. Lee, and Choon Sik Cho, "H-Plane Sectoral Filtering Horn Antenna in PCB Substrates Using Via Fences at Millimetre-Wave," IEEE European Microwave Conference, pp. 818-821, Oct. 2007. |
[27] | Dong-Yeon Kim, Jae W. Lee, Choon Sik Cho, and Jaeheung Kim, "A Compact Tri-Band PIFA with Multiple-Folded Parasitic Elements," IEEE International Microwave Symposium, pp.259-262, June 2007. |
[28] | J. W. Lee, K. K. Kang, C.S. Cho, and J. Kim, "An Enhancement of Input Impedance Bandwidth of Circular-Disc Loaded Monopole Antenna with Horizontal and Vertical Parasitic Strips," IEEE Asia Pacific Microwave Conference, Dec. 2006. |
[29] | Jinse Jung, Duk-Jae Woo, Choon Sik Cho and Taek-Kyung Lee, "Power Enhancement of Microwave Oscillator Using a High-Q Spiral-Shaped DGS Resonator," IEEE Asia Pacific Microwave Conference, Dec. 2006. |
[30] | Sung Hwan Ahn, Jae W. Lee, Taek K. Lee and Choon Sik Cho, "Even-Odd Mode Analysis of Unequal Dual-Band Wilkinson Power Divider," Korea-Japan Joint Conference on AP/EMC/EMT, pp. 305-308, Sept. 2006. |
[31] | Mi Jung Kim, Choon Sik Cho and Jaeheung Kim, "Miniaturized Antenna Using a Planar Mobius Strip Bisected Along the Circumferential Direction," IEEE European Microwave Conference, pp. 827-830, Sept. 2006. |
[32] | Seung Hoon Ji, Gyu Seok Hwang, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "836 MHz/1.95GHz Dual-Band Class-E Power Amplifier Using Composite Right/Left-Handed Transmission Lines," IEEE European Microwave Conference, pp. 356-359, Sept. 2006. |
[33] | Jinse Jung, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "Low Phase Noise Microwave Oscillator Using Split Ring Resonators," IEEE European Microwave Conference, pp. 95-98, Sept. 2006. |
[34] | Kyoung G. Kang, Jae W. Lee, Choon Sik Cho, and Taek K. Lee, "A Dual-Band Planar Inverted-F Antenna with Periodic Grooves," IEEE European Microwave Conference, pp. 1465-1468, Sept. 2006. |
[35] | Pil Sung Park, Jae W. Lee, Taek K. Lee, Choon Sik Cho and Jaeheung Kim, "Reduction of Radiated Emission from Signal Traces Using Modified Small-Sized Ground Patterns," IEEE Proceedings of International Symposium on Electromagnetic Compatibility, pp. 368-371, July 2006. |
[36] | Mi Jumg Kim, Choon Sik Cho and Jaeheung Kim, "Miniaturized Resonator Using a Planar Möbius Strip Bisected Along the Circumferential Direction," IEEE International Microwave Symposium, pp. 1385-1388, June 2006. |
[37] | Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "Double Half-Ring Resonatorsfor Bandpass Filter Applications with Suppression of Multiple Harmonics and Size Reduction," IEEE Asia Pacific Microwave Conference, Dec. 2005. |
[38] | Jae W. Lee, Choon Sik Cho and Taek K. Lee, "A New Vertically Half Disc-Loaded UWB Filtering Antenna with Horizontally Top-Loaded Small Disc," ISAP, Aug. 2005. |
[39] | Tae Hwan Kim, Choon Sik Cho and Jae W. Lee, "Inset CPW-Fed UWB Antenna," ISAP, Aug. 2005. |
[40] | Mi-Jung Kim, Choon Sik Cho and Jaeheung Kim, "A Novel CPW-Fed Wideband Antenna Using Ring Growth Configuration," ISMOT, Aug., 2005. |
[41] | Jung Woo Ha, Choon Sik Cho, Jae W. Lee and Jaeheung Kim, "A Ku-Band Class-E High Efficiency Frequency Tripler," ISMOT, Aug. 2005. |
[42] | Tae Hwan Kim, Jae W. Lee, and Choon Sik Cho, "A CPW-Fed Self-affine Fractal Antenna," IEEE AP-S International Symposium, July 2005. |
[43] | Jung Woo Ha, Choon Sik Cho, and Jae W. Lee, "A Triple-Band Antenna using CPW-Fed and Meander-line for PCS/IMT-2000/Bluetooth Applications," IEEE AP-S International Symposium, July 2005. |