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Publication

Int’l. Journal 목록
번호	제목	파일
2023
100	Design of CMOS-Based Unit Channel of Beamforming Transceivers for FACS Applications Seongjin Jang, Hui Dong Lee, Bonghyuk Park, Seunghyun Jang, Sunwoo Kong, Changkun Park IEEE Access vol. 11, pp. 140056-140068, 07 Dec. 2023
99	A Ka-band 3-bit GaN Digital Step Attenuator Using Phase Compensation Method Seonhye Jang, Junhyuk Yang, Jaeyong Lee, Changkun Park IEEE Access vol. 11, pp. 125835-125843, 23 Oct. 2023
98	Design Techniques for L-C-L T-Type Wideband CMOS Phase Shifter with Suppressed Phase Error Seongjin Jang, Changkun Park Electronics vol. 12, no. 20, Article #: 4368, 21 Oct. 2023
97	Design Technique of K-Band CMOS Phase Shifter with L-C-L T-type Low Pass Structure Seongjin Jang, Choul-Young Kim, Changkun Park Electronics vol. 12, no. 17, Article #: 3678, 31 Aug 2023
96	Ka-Band CMOS ×5 Frequency Multiplier With Current-Reuse Technique Jeong-Taek Lim, Han-Woong Choi, Jae-Hyeok Song, Sunkyu Choi, Changkun Park, Choul-Young Kim IEEE Microwave and Wireless Technology Letters vol. 33, no. 8, pp.1227-1230, Aug. 2023
95	K-band CMOS low-noise amplifier with 180° phase shift function using cascode structure Seongjin Jang, Jaeyong Lee, Changkun Park Electronics Letters vol. 59, no. 15, e12908, Aug. 2023
94	Ka-Band GaN HEMT Phase Shifter with T-Type Structure for Beamforming Applications Sunju Kim, Seongjin Jang, Jaeyong Lee, Hayeon Jeong, Ki-Jin Kim, Changkun Park IEEE Microwave and Wireless Technology Letters vol. 33, no. 6, pp.743-746, Jun. 2023
93	Three-Stacked CMOS Power Amplifier to Increase Output Power with Stability Enhancement for mm-Wave Beamforming Systems Hayeon Jeong, Hui Dong Lee, Bonghyuk Park, Seunghyun Jang, Sunwoo Kong, Changkun Park IEEE Transactions on Microwave Theory and Techniques vol. 71, no. 6, pp.2450-2464, Jun. 2023
92	W-Band GaN HEMT Switch Using the State-Dependent Concurrent Matching Method Hyemin Im, Jaeyong Lee, Changkun Park Electronics vol. 12, no. 10, Article #: 2236, 15 May 2023
91	Layout of MOS Varactor with Improved Quality Factor for Cross-Coupled Differential Voltage-Controlled Oscillator Applications Milim Lee, Jaeyong Lee, Changkun Park Electronics vol. 12, no. 6, Article #: 1385, 14 Mar. 2023
90	Design of K-Band Power Amplifier with 180-Degree Phase-Shift Function Using Low-Power CMOS Process Seongjin Jang, Jaeyong Lee, Jeong-Woo Lee, Changkun Park Applied Sciences-Basel vol. 13, no. 4, Article #: 2501, 15 Feb. 2023
89	Epitaxial κ-Ga2O3/GaN heterostructure for high electron-mobility transistors Ha Young Kang, Min Jae Yeom, Jeong Yong Yang, Yoonho Choi, Jaeyong Lee, Changkun Park, Geonwook Yoo, Roy Byung Kyu Chung Materials Today Physics vol. 31, Article #: 101002, Feb. 2023
88	Ka-Band Three-Stack CMOS Power Amplifier with Split Layout of External Gate Capacitor for 5G Applications Junhyuk Yang, Jaeyong Lee, Seongjin Jang, Hayeon Jeong, Changkun Park Electronics vol. 12, no. 2, Article #: 432, 12 Jan. 2023
2022
87	Design of a K-Band High-Linearity Asymmetric SPDT CMOS Switch using a Stacked Transistor Taehun Kim, Hui Dong Lee, Bonghyuk Park, Seunghyun Jang, Sunwoo Kong, Changkun Park IEEE Microwave and Wireless Components Letters vol. 32, no. 12, pp.1443-1446, Dec. 2022
86	Compact Ku-band CMOS ×3 Frequency Multiplier with Improved Harmonic Suppression Jeong-Taek Lim, Han-Woong Choi, Jae-Hyeok Song, Changkun Park, Choul-Young Kim Microwave and Optical Technology Letters vol. 64, no. 10, pp.1713-1718, Oct. 2022
85	Reconfigurable Radio-Frequency High-Electron Mobility Transistors via Ferroelectric-Based Gallium Nitride Heterostructure Jeong Yong Yang, Min Jae Yeom, Jaeyong Lee, Kyusang Lee, Changkun Park, Junseok Heo, Geonwook Yoo Advanced Electronic Materials vol. 8, no. 9, Article #: 2101406, Sep. 2022
84	Highly Linear K-/Ka-Band SPDT Switch Based on Traveling-Wave Concept in a 150-nm GaN pHEMT Process Taehun Kim, Hyemin Im, Suk-Hui Lee, Ki-Jin Kim, Changkun Park IEEE Microwave and Wireless Components Letters vol. 32, no. 8, pp.987-990, Aug. 2022
83	Broadband Metasurface Superstrate for Polarization-Independent Wave Focusing and Gain Enhancement at Ka-Band Kanghyeok Lee, Wonwoo Lee, Hong Soo Park, Semin Jo, Ha Young Hong, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong Scientific Reports vol. 12, Article number: 12015 (2022), 14 July 2022
82	A Fully-Integrated Ka-Band CMOS Rectifier Using Large Signal Analysis for Wireless Power Transfer Junhyuk Yang, Seonhye Jang, Hong Soo Park, Kanghyeok Lee, Ha Young Hong, Wonwoo Lee, Semin Jo, Sun K. Hong, Hojin Lee, Changkun Park IEEE Microwave and Wireless Components Letters vol. 32, no. 7, pp.911-914, Jul. 2022
81	Ku-Band CMOS Power Amplifier with Three-Stack Power Stage to Enhance Output Power and Efficiency Junhyuk Yang, Jaeyong Lee, Seongjin Jang, Hayeon Jeong, Choulyoung Kim, Changkun Park Applied Sciences-Basel vol. 12, no. 9, Article #: 4432, Apr. 2022
2021
80	Optimization Technique for High-Gain CMOS Power Amplifier for 5G Applications Hayeon Jeong, Hui Dong Lee, Bonghyuk Park, Seunghyun Jang, Sunwoo Kong, Changkun Park Applied Sciences-Basel vol. 11, no. 24, Article #: 11691, Dec. 2021
79	Ka-Band Rotman Lens-Based Retrodirective Beamforming System for Wireless Power Transfer Hayoung Hong, Hongsoo Park, Kanghyeok Lee, Wonwoo Lee, Semin Jo, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong Journal of Electromagnetic Engineering and Science vol. 21, no. 5, pp.391-398, Nov. 2021
78	Single-Layer Phase Gradient mmWave Metasurface for Incident Angle Independent Focusing Wonwoo Lee, Semin Jo, Kanghyeok Lee, Hong Soo Park, Junhyuk Yang, Ha Young Hong, Changkun Park, Sun K. Hong, Hojin Lee Scientific Reports vol. 11, Article number: 12671 (2021), 16 June 2021
77	One-Chip Integration of RF MEMS Switched Capacitor and Power Amplifier Using CMOS-Compatible Post Fabrication Process Hyunok Cho, Milim Lee, Changkun Park, Jae Yeong Park Journal of Electrical Engineering & Technology vol. 16, pp. 491-498, Jan. 2021
76	A Linearization Method with Optimizing Impedance of Envelope Signal to Suppress IMD3 of RF CMOS Power Amplifier Changhyun Lee, Jinho Yoo, Changkun Park Microwave and Optical Technology Letters vol. 63, no. 2, pp.450-454, Feb. 2021
2020
75	Wireless Transceiver for Three-Dimensional Integrated Circuits Using a Ring Oscillator Dongwoo Moon, Milim Lee, Changhyun Lee, Joung-Hu Park, Changkun Park Journal of Circuits Systems and Computers vol. 29, no. 10, pp.2050161-1 ~ 2050161-10, Oct. 2020
74	Differential 2.4-GHz CMOS Power Amplifier Using Stacked NMOS, Transformer, and PMOS Structures to Enhance Reliability Gayeon Ko, Milim Lee, Joung-Hu Park, Changkun Park Microwave and Optical Technology Letters vol. 62, no. 4, pp.1503-1508, Apr. 2020
73	Antiphase Method of CMOS Power Amplifier Using PMOS Driver Stage to Enhance Linearity Jiwon Kim, Changhyun Lee, Jinho Yoo, Changkun Park Electronics vol. 9, no. 1, Article #: 103, Jan. 2020
2019
72	1.9-GHz CMOS Power Amplifier Using Adaptive Biasing Technique at AC Ground Node to Enhance Linearity and Efficiency Inseong Kang, Jinho Yoo, Changkun Park Journal of Information and Communication Convergence Engineering vol. 17, no. 4, pp.285-289, Dec. 2019
71	A Triple-Band CMOS Power Amplifier Using Multi-Band and Switchable Matching Network for Wireless Mobile Milim Lee, Changkun Park IEEE Transactions on Microwave Theory and Techniques vol. 67, no. 10, pp.4220-4231, Oct. 2019
70	A Study Comparing Current and Voltage Combining Techniques for CMOS Power Amplifiers for WLAN Applications Jonghoon Park, Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol. 61, no. 8, pp.2020-2016, Oct. 2019
69	Suppression of IMD3 in CMOS Power Amplifier Using Bias Circuit of Common-Gate Transistor with Cascode Structure Jinwon Kim, Changhyun Lee, Jinho Yoo, Changkun Park Progress In Electromagnetics Research M vol. 82, pp.1-8, 13. Jun. 2019
68	A CMOS power amplifier using an asymmetrical input transformer to enhance the gain for WLAN applications Yonghun Sim, Jinho Yoo, Changhyun Lee, Changkun Park Progress In Electromagnetics Research M vol. 81, pp.193-202, 13. Jun. 2019
67	An RF Transceiver for Wireless Chip-to-Chip Communication Using a Cross-Coupled Oscillator Hooyoung Shin, Milim Lee, Changhyun Lee, Changkun Park Progress In Electromagnetics Research C vol. 92, pp.165-175, 07. May. 2019
66	A CMOS Power Amplifier Using a Balun Embedded Driver Stage for IEEE 802.11n WLAN Applications Minoh Son, Jinho Yoo, Changhyun Lee, Changkun Park Progress In Electromagnetics Research C vol. 90, pp.169-181, Mar. 2019
65	An Asymmetric-Width Broad-Side Coupled Transformer to Reduce the Parasitic Coupling Capacitance for CMOS Power Amplifier Applications Jonghoon Park, Changhyun Lee, Changkun Park Progress In Electromagnetics Research M vol. 78, pp.93-101, Jan. 2019
64	Switching-Mode CMOS Power Amplifier Using a Differentially Coupled Series Inductor Changhyun Lee, Changkun Park Progress In Electromagnetics Research Letters vol. 81, pp.59-64, Jan. 2019.
2017
63	A CMOS Antiphase Power Amplifier With an MGTR Technique for Mobile Applications Jonghoon Park, Changhyun Lee, Jinho Yoo, Changkun Park IEEE Transactions on Microwave Theory and Techniques vol. 65, no. 11, pp. 4645-4656, Nov. 2017.
62	Advanced RF CMOS Power Amplifier with a Monolithic High-Q Transformer on a Thick Laminated Organic Layer Seongryul Kim, Changkun Park, Jong-Min Yook Microwave and Optical Technology Letters vol. 59, no. 8, pp. 1829-1832, Aug. 2017.
61	Transceiver for Wireless Power Transfer Using a Cross-Coupled Oscillator for a Wireless On-Wafer Test Milim Lee, Changhyun Lee, Changkun Park IEEE Transactions on Instrumentation and Measurement vol. 66, no. 8, pp. 2097-2105, Aug. 2017.
60	A CMOS Power Amplifier Using an Active Balun as a Driver Stage to Enhance Its Gain Yonghun Sim, Jonghoon Park, Jinho Yoo, Changhyun Lee, Changkun Park Microelectronics Journal vol. 63, pp. 160-169, May. 2017.
59	RF CMOS Power Amplifier Using a Split Inter-Stage Inductor for IEEE 802.11n Applications Minoh Son, Jinho Yoo, Inseong Kang, Changhyun Lee, Jihoon Kim, Ho Jong Park, Young-Bae Park, Changkun Park International Journal of Microwave and Wireless Technologies vol. 9, no. 4, pp. 719-727, May. 2017.
58	Cost-effective 97%-efficiency Charge-pump Voltage Balancer for Multi-level PWM Photovoltaic Micro-Inverter Mohana Sundar, Jeong-Hyun Park, Joung-Hu Park, Changkun Park IEICE Electronics Express vol. 14, no. 8, pp. 1-6, Apr. 2017.
57	A Quad-band CMOS Linear Power Amplifier for EDGE Applications using an Anti-phase Method to Enhance its Linearity Jonghoon Park, Changhyun Lee, Changkun Park IEEE Transactions on Circuits and Systems I-Regular Papers vol. 64, no. 4, pp. 765-776, Apr. 2017.
56	2.4-GHz CMOS Linear Power Amplifier for IEEE 802.11n WLAN Applications Jinho Yoo, Changhyun Lee, Inseong Kang, Minoh Son, Yonghoon Sim, Changkun Park Microwave and Optical Technology Letters vol. 59, no. 3, pp. 546-550, Mar. 2017.
55	Cell-Based ESD Diodes with a Zigzag-Shaped Layout to Enhance the ESD Survival Level Minoh Son, Changkun Park Journal of Circuits Systems and Computers vol. 26, no. 2, pp. 1560-1563, Feb. 2017.
2016
54	A 2.4-GHz CMOS Power Amplifier Using a Gain and Stability Enhancement Technique for IEEE 802.11n WLAN Applications Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol. 58, no. 9, pp. 2265-2268, Sep. 2016.
53	A CMOS Voltage-Controlled Oscillator Using a Cascode Structure Hooyoung Shin, Milim Lee, Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol. 58, no. 7, pp. 1560-1563, Jul. 2016.
52	A CMOS Power Amplifier Using Split Input and Output Transformers to Minimize Its Chip Area Hayeon Jeong, Gayeon Ko, Hooyoung Shin, Inseong Kang, Jinho Yoo, Changkun Park Microwave and Optical Technology Letters vol. 58, no. 6, pp. 1443-1446, Jun. 2016.
51	Design Methodology for a Switching-Mode RF CMOS Power Amplifier with an Output Transformer Changhyun Lee, Changkun Park International Journal of Microwave and Wireless Technologies vol. 8, no. 3, pp. 471-477, May. 2016.
50	An Integrated Design of Quasi-Zero Stiffness Mechanism Hyeong-Joon Ahn, Sung-Hun Lim, Changkun Park Journal of Mechanical Science and Technology vol. 30, no. 3, pp. 1071-1075, Mar. 2016.
49	A Linear CMOS Power Amplifier Using Class-D to Reduce the Number of Required Inductors Minoh Son, Jinho Yoo, Changkun Park Microwave and Optical Technology Letters vol. 58, no. 3, pp. 565-569, Mar. 2016.
48	A CMOS Power Amplifier Using a Split Cascode Structure to Enhance Its Efficiency Yonghoon Sim, Inseong Kang, Changkun Park Microwave and Optical Technology Letters vol. 58, no. 2, pp. 309-312, Feb. 2016.
2015
47	Study of Stability Problems Due to the Undesired Coupling of a RF Power Amplifier Using a Distributed Active Transformer Jonghoon Park, Changhyun Lee, Changkun Park Microelectronics Journal vol. 46, no. 11, pp. 1046-1052, Nov. 2015.
46	A Differentially Coupled Series Inductor for Differential RFICs Changhyun Lee, Seokhyun Yoon, Changkun Park Microwave and Optical Technology Letters vol. 57, no.9, pp.2223-2225, Sep. 2015.
45	Analysis of Shoot-Through Current of Supply Modulator for Envelope-Tracking Techniques Jinho Yoo, Seokhyun Yoon, Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol. 57, no.7, pp.1579-1583, Jul. 2015.
44	30-GHz CMOS Voltage-Controlled Oscillator Using Drain-Gate Coupled Transformer to Minimize the Influences of Parasitic Components Milim Lee, Sungwoong Cho, Changkun Park Microwave and Optical Technology Letters vol. 57, no.5, pp.1025-1027, May. 2015.
2014
43	A Current-Shared Cascade Structure With an Auxiliary Power Regulator for Switching Mode RF Power Amplifiers Hoyong Hwang, Changhyun Lee, Jonghoon Park, Changkun Park IEEE Transactions on Microwave Theory and Techniques vol. 62, no.11, pp.2711-2722, Nov. 2014.
42	X-Band CMOS Power Amplifier with High Efficiency for Motion Detection Radar Jonghoon Park, Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol. 56, no.11, pp.2552-2557, Nov. 2014.
41	Split Driver Stages for a Switching Mode Power Amplifier with Multipairs of Power Stages Donghwan Seo, Changkun Park Microwave and Optical Technology Letters vol. 56, no.10, pp.2341-2345, Oct. 2014.
40	Zigzag-Shaped Coil Array Structure for Wireless Chip-to-Chip Communication Applications Changhyun Lee, Jonghoon Park, Changkun Park IEEE Transactions on Electron Devices vol. 61, no.9, pp.3245-3251, Sep. 2014.
39	A CMOS LNA Using a Harmonic Rejection Technique to Enhance Its Linearity Jaehyuk Yoon, Changkun Park IEEE Microwave and Wireless Components Letters vol.24, no.9, pp.605-607, Sep. 2014.
38	1.9-GHz CMOS Power Amplifier Using a Current Source to Enhance Its Dynamic Range Donghwan Seo, Sung-Hun Lim, Hyeong-Joon Ahn, Changkun Park Microwave and Optical Technology Letters vol. 56, no.8, pp.1886-1891, Aug. 2014.
37	A Miniaturized 2.4-GHz CMOS Low-Noise Amplifier Using a Gate-Source Coupling Technique Taewon Kim, Changhyun Lee, Changkun park Microwave and Optical Technology Letters vol. 56, no.8, pp.1836-1838, Aug. 2014.
36	2.4 GHz CMOS Power Amplifier with Mode-Locking Structure to Enhance Gain Changhyun Lee, Changkun Park Scientific World Journal vol. 2014, Article ID 967181, 5 pages, Jun. 2014.
35	Input Balun Embedded Low-Noise Amplifier with a Differential Structure Jaehyuk Yoon, Changkun Park IEEE Microwave and Wireless Components Letters vol. 24, no.6, pp. 403-405, Jun. 2014.
34	Study on fault current limiting characteristics of a SFCL using magnetic coupling of two coils with mechanical switch driven by electromagnetic repulsion force Sung-Hun Lim, Hyeong-Joon Ahn, Changkun Park IEEE Transactions on Applied Superconductivity vol.24, no.3, pp.5600704, Jun. 2014.
33	An X-Band CMOS Power Amplifier with a Driver Stage Using a Shot-Through Current Rejection Technique Jonghoon Park, Changkun Park Microwave and Optical Technology Letters vol. 56, no.5, pp.1159-1162, May. 2014.
32	Maximum power point tracking without current sensor for photovoltaic module integrated converter using Zigbee wireless network Sol Moon, Seong-Jin Kim, Jeong-Won Seo, Joung-Hu Park, Changkun Park, Chan-Su Chung International Journal of Electrical Power and Energy Systems vol. 56, pp. 286-297, Mar. 2014.
31	5-GHz Low Noise Amplifier with ESD Protection Method Using Transformer Jaehyuk Yoon, Changkun Park Microwave and Optical Technology Letters vol.56, no.3, pp.684-689, Mar. 2014.
30	Resonance Frequency Effects of an External Coil for IOP Sensor Applications Hoyong Hwang, Byungjoo Kang, Soo Hyun Lee, Cheol-In Jang, Ji Yoon Kang, Changkun Park Journal of Electromagnetic Waves and Applications vol.28, no.7, pp.790-801, Feb. 2014.
29	Electrostatic discharge protection devices with series connection using distributed cell-based diodes Minoh Son, Changkun Park Electronics Letters vol.50, no.3, pp.168-170, Jan. 2014.
28	Investigation of the Power Transistor Size Related to the Efficiency of Switching-Mode RF CMOS Power Amplifier Hoyong Hwang, Donghwan Seo, Jonghoon Park, Changkun Park Microwave and Optical Technology Letters vol.56, no.1, pp.110-117, Jan. 2014.
2013
27	Current Shared Cascade Structure for the Driver Stages of Switching Mode RF Power Amplifiers Hoyong Hwang, Changkun Park IEEE Microwave and Wireless Components Letters vol.23, no.11, pp.605-607, Nov. 2013.
26	Numerical Analysis of the Supply Voltage of a Switching Mode RF CMOS Power Amplifier to Enhance Its Efficiency Hoyong Hwang, Donghwan Seo, Changhyun Lee, Changkun Park Microwave and Optical Technology Letters vol.55, no.10, pp.2479-2484, Oct. 2013.
25	Transceiver with Inductive Coupling for Wireless Chip-to-chip Communication Using a 50-nm Digital CMOS Process Changhyun Lee, Jonghoon Park, Jinho Yoo, Hyungjun Cho, Jungi Choi, Jeongho Cho, Changkun Park Microelectronics Journal vol.44, no.9, pp.852-859, Sep. 2013.
24	A Wireless Intraocular Pressure Sensor with Variable Inductance Using a Ferrite Material Byungjoo Kang, Hoyong Hwang, Soo Hyun Lee, Ji Yoon Kang, Joung-Hu Park, Chulhun Seo, Changkun Park Journal of Semiconductor Technology and Science vol.13, no.4, pp.355-360, Aug. 2013.
23	Study of the Coil Structure for Wireless Chip-to-Chip Communication Applications Changhyun Lee, Jonghoon Park, Jinho Yoo, Changkun Park Progress In Electromagnetics Research Letters vol.38, pp.127-136, Mar. 2013.
22	Study of the Inter-Stage Capacitor Effects of a RF CMOS Power Amplifier to Enhance Its Efficiency Hoyong Hwang, Donghwan Seo, Jonghoon Park, Changkun Park Progress In Electromagnetics Research C vol.37, pp.29-40, Feb. 2013.
21	Differential Transformer Using Bonder-Wires and Patterns on a Printed Circuit Board for RF Circuit Applications Byungjoo Kang, Hoyong Hwang, Changkun Park Progress in Electromagnetics Research-PIER vol.135, pp.363-371, Jan. 2013.
2012
20	Power Detection Method Using A Virtual Ground Node for RF CMOS Power Amplifier Applications Donghwan Seo, Changhyun Lee, Jonghoon Park, Changkun Park Journal of Electromagnetic Waves and Applications vol.26, no.17-18, pp.2341-2347, Dec. 2012.
19	A Brief Review: Stage-Convertible Power Amplifier Using Differential Line Inductor Jonghoon Park, Changhyun Lee, Changkun Park Wireless Engineering and Technology vol.3, no.4, pp.189-194, Oct. 2012.
18	X-Band CMOS Power Amplifier Using Mode-Locking Method for Sensor Applications Changhyun Lee, Jonghoon Park, Changkun Park Journal of Electromagnetic Waves and Applications vol.26, no.5-6, pp.633-640, Jul. 2012.
2010
17	CMOS Class-E Power Amplifier (1.8-GHz) with an Additional Thin-Film Technology Changkun Park, Chulhun Seo IET Circuits Devices & Systems vol.4, no.6, pp.479-485, Nov. 2010.
16	X-Band High-Power Amplifier with a Magnetically Coupled Power-combiner Kyung Ai Lee, Changkun Park, Jong-Hoon Chun, Songcheol Hong Microwave and Optical Technology Letters vol.52, no.1, pp.110-113, Jan. 2010.
2009
15	A 1.8-GHz CMOS Power Amplifier Using Stacked nMOS and pMOS Structures for High-Voltage Operation Ki Yong Son, Changkun Park, Songcheol Hong IEEE Transactions on Microwave Theory and Techniques vol.57, no.11, pp.2652-2660, Nov. 2009.
14	A Quasi-Four-Pair Class-E CMOS RF Power Amplifier With an Integrated Passive Device Transformer Hongtak Lee, Changkun Park, Songcheol Hong IEEE Transactions on Microwave Theory and Techniques vol.57, no.4, pp.752-759, Apr. 2009.
2008
13	A Load-Shared CMOS Power Amplifier with Efficiency Boosting at Low Power Mode for Polar Transmitters Dong Ho Lee, Changkun Park, Jeonghu Han, Younsuk kim, Songcheol Hong, Chang-Ho Lee, Joy Laskar IEEE Transactions on Microwave Theory and Techniques vol.56, no.7, pp.1565-1574, Aug. 2008.
12	A 1.8-GHz CMOS Power Amplifier Using a Dual-Primary Transformer With Improved Efficiency in the Low Power Region Changkun Park, Jeonghu Han, Haksun Kim, Songcheol Hong IEEE Transactions on Microwave Theory and Techniques vol.56, no.4, pp.782-792, Apr. 2008.
11	A Class-E CMOS RF Power Amplifier with Cascaded Class-D Driver Amplifier Jaemin Jang, Hongtak Lee, Changkun Park, Songcheol Hong Microwave and Optical Technology Letters vol.50, no.2, pp.470-473, Feb. 2008.
2007
10	A 1.9-GHz CMOS Power Amplifier Using an Interdigitated Transmission Line Transformer Changkun Park, Sang-Hyun Baek, Bon-Hyun Ku, Songcheol Hong Microwave and Optical Technology Letters vol.49, no.12, pp.3162-3166, Dec. 2007.
9	CMOS Power Cell with Improved Junction Breakdown Using Interdigitated Body Contact Changkun Park, Jeonghu Han, Songcheol Hong Microwave and Optical Technology Letters vol.49, no.12, pp.3085-3087, Dec. 2007.
8	Tournament-Shaped Magnetically Coupled Power-Combiner Architecture for RF CMOS Power Amplifier Changkun Park, Dong Ho Lee, Jeonghu Han, Songcheol Hong IEEE Transactions on Microwave Theory and Techniques vol.55, no.10, pp.2034-2042, Oct. 2007.
7	A CMOS Active Balun Using Bond Wire Inductors and a Gain Boosting Technique Dong Ho Lee, Jeonghu Han, Changkun Park, Songcheol Hong IEEE Microwave and Wireless Components Letters vol.17, no.9, pp.676-678, Sep. 2007.
6	A CMOS power amplifier with an adaptive bias scheme for mobile radio frequency identification reader applications Jeonghu Han, Younsuk Kim, Changkun Park, Dongho Lee, Songcheol Hong Microwave and Optical Technology Letters vol.49, no.6, pp.1241-1245, Jun. 2007.
5	A CMOS RF Power Amplifier Using an Off-chip Transmission Line Transformer with 62% PAE Jaemin Jang, Changkun Park, Haksun Kim, Songcheol Hong IEEE Microwave and Wireless Components Letters vol.17, no.5, pp.385-387, May. 2007.
4	A 1.9-GHz CMOS Power Amplifier Using Three-Port Asymmetric Transmission Line Transformer for a Polar Transmitter Changkun Park, Younsuk Kim, Haksun Kim, Songcheol Hong IEEE Trans. Microwave Theory and Tech. vol. 55, no. 2, Part 1, pp. 230-238, Feb. 2007
3	A 1.9-GHz Triple-Mode Class-E Power Amplifier for a Polar Transmitter Changkun Park, Younsuk Kim, Haksun Kim, Songcheol Hong IEEE Microwave and Wireless Components Letters vol.17, no.2, pp.148-150, Feb. 2007.
2006
2	Fully Integrated 1.9-GHz CMOS Power Amplifier for Polar Transmitter Applications Changkun Park, Younsuk Kim, Haksun Kim, Songcheol Hong Microwave and Optical Technology Letters vol.48, no.10, pp.2053-2056, Oct. 2006.
1	CMOS RF power amplifier with reconfigurable transformer Younsuk Kim, Changkun Park, Haksun Kim, Songcheol Hong IEEE Trans. Microwave Theory and Tech.Electronics Letters vol.42, no.7, pp.405-407, Mar. 2006.