Works by Hwang, Keum Cheol

Results: 91

Highly Linear 2.6 GHz Band InGaP/GaAs HBT Power Amplifier IC Using a Dynamic Predistorter.

Published in:

Electronics (2079-9292), 2025, v. 14, n. 11, p. 2300, doi. 10.3390/electronics14112300

By:

Jeon, Hyeongjin;
Shin, Jaekyung;
Choi, Woojin;
Bae, Sooncheol;
Bae, Kyungdong;
Bin, Soohyun;
Kim, Sangyeop;
Ju, Yunhyung;
Ahn, Minseok;
Mun, Gyuhyeon;
Hwang, Keum Cheol;
Lee, Kang-Yoon;
Yang, Youngoo

Publication type:

Article

23.5–27.5 GHz Band Doherty Power Amplifier Integrated Circuit Using 28 nm Bulk CMOS Process Based on Dynamic Power Dividing Network.

Published in:

Electronics (2079-9292), 2024, v. 13, n. 21, p. 4190, doi. 10.3390/electronics13214190

By:

Choi, Young Chan;
Bin, Soohyun;
Hwang, Keum Cheol;
Lee, Kang-Yoon;
Yang, Youngoo

Publication type:

Article

Frequency Selective Degeneration for 6–18 GHz GaAs pHEMT Broadband Power Amplifier Integrated Circuit.

Published in:

Electronics (2079-9292), 2020, v. 9, n. 10, p. 1588, doi. 10.3390/electronics9101588

By:

Oh, Sungjae;
Yoo, Eunjoo;
Oh, Hansik;
Koo, Hyungmo;
Shin, Jaekyung;
Hwang, Keum Cheol;
Lee, Kang-Yoon;
Yang, Youngoo

Publication type:

Article

A 2.45 GHz High Efficiency CMOS RF Energy Harvester with Adaptive Path Control.

Published in:

Electronics (2079-9292), 2020, v. 9, n. 7, p. 1107, doi. 10.3390/electronics9071107

By:

Khan, Danial;
Basim, Muhammad;
Shehzad, Khuram;
Ain, Qurat Ul;
Verma, Deeksha;
Asif, Muhammad;
Oh, Seong Jin;
Pu, Young Gun;
Yoo, Sang-Sun;
Hwang, Keum Cheol;
Yang, Youngoo;
Lee, Kang-Yoon

Publication type:

Article

A Design of Low-Power 10-bit 1-MS/s Asynchronous SAR ADC for DSRC Application.

Published in:

Electronics (2079-9292), 2020, v. 9, n. 7, p. 1100, doi. 10.3390/electronics9071100

By:

Verma, Deeksha;
Shehzad, Khuram;
Khan, Danial;
Kim, Sung Jin;
Pu, Young Gun;
Yoo, Sang-Sun;
Hwang, Keum Cheol;
Yang, Youngoo;
Lee, Kang-Yoon

Publication type:

Article

Design of a Low Power 10-b 8-MS/s Asynchronous SAR ADC with On-Chip Reference Voltage Generator.

Published in:

Electronics (2079-9292), 2020, v. 9, n. 5, p. 872, doi. 10.3390/electronics9050872

By:

Shehzad, Khuram;
Verma, Deeksha;
Khan, Danial;
Ain, Qurat Ul;
Basim, Muhammad;
Kim, Sung Jin;
Pu, YoungGun;
Hwang, Keum Cheol;
Yang, Youngoo;
Lee, Kang-Yoon

Publication type:

Article

Scaled GaN-HEMT Large-Signal Model Based on EM Simulation.

Published in:

Electronics (2079-9292), 2020, v. 9, n. 4, p. 632, doi. 10.3390/electronics9040632

By:

Lee, Wooseok;
Kang, Hyunuk;
Choi, Seokgyu;
Lee, Sangmin;
Kwon, Hosang;
Hwang, Keum cheol;
Lee, Kang-Yoon;
Yang, Youngoo

Publication type:

Article

Optimization of a nonuniformly slotted rectangular waveguide antenna.

Published in:

Microwave & Optical Technology Letters, 2008, v. 50, n. 7, p. 1935, doi. 10.1002/mop.23498

By:

Keum Cheol Hwang

Publication type:

Article

Miniaturised ultra‐wideband circular polarised koch fractal crossed dipole array.

Published in:

IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2024, v. 18, n. 10, p. 731, doi. 10.1049/mia2.12506

By:

Choi, Won Min;
Jeong, Taeyong;
Lee, Dong Hwan;
Kim, Jun Hee;
Lee, Dong Geun;
Hwang, Keum Cheol

Publication type:

Article

GaN-HEMT asymmetric three-way Doherty power amplifier using GPD.

Published in:

IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2018, v. 12, n. 13, p. 2115, doi. 10.1049/iet-map.2018.5464

By:

Hyungmo Koo;
Hyunuk Kang;
Wooseok Lee;
Hwiseob Lee;
Kang-Yoon Lee;
Keum Cheol Hwang;
Youngoo Yang

Publication type:

Article

X-band two-stage Doherty power amplifier based on pre-matched GaN-HEMTs.

Published in:

IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2018, v. 12, n. 2, p. 179, doi. 10.1049/iet-map.2017.0127

By:

Wooseok Lee;
Hwiseob Lee;
Hyunuk Kang;
Wonseob Lim;
Jaekyung Han;
Keum Cheol Hwang;
Kang-Yoon Lee;
Youngoo Yang

Publication type:

Article

VHF/UHF broadband four-way power combiner/divider using 0° hybrid and impedance transformer based on transmission lines.

Published in:

IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2017, v. 11, n. 12, p. 1748, doi. 10.1049/iet-map.2016.1112

By:

Hwiseob Lee;
Wonseob Lim;
Jongseok Bae;
Wooseok Lee;
Hyunuk Kang;
Kang-Yoon Lee;
Keum Cheol Hwang;
Youngoo Yang

Publication type:

Article

Band-Pass and Band-Stop Filter Frequency Selective Surface with Harmonic Suppression.

Published in:

Applied Sciences (2076-3417), 2024, v. 14, n. 15, p. 6633, doi. 10.3390/app14156633

By:

Hwang, Dong Hyee;
Jeong, Taeyong;
Kim, Jun Hee;
Hwang, Keum Cheol

Publication type:

Article

A Two-Port Dual-Band Dual-Circularly-Polarized Dielectric Resonator Antenna.

Published in:

Applied Sciences (2076-3417), 2024, v. 14, n. 10, p. 4062, doi. 10.3390/app14104062

By:

Van Trinh, Thai;
Trinh-Van, Son;
Lee, Kang-Yoon;
Yang, Younggoo;
Hwang, Keum Cheol

Publication type:

Article

Design of Series-Fed Circularly Polarized Beam-Tilted Antenna for Microwave Power Transmission in UAV Application.

Published in:

Applied Sciences (2076-3417), 2024, v. 14, n. 8, p. 3490, doi. 10.3390/app14083490

By:

Park, Mok Yoon;
Kim, Jun Hee;
Yi, Sang-hwa;
Lim, Wonseob;
Yang, Youngoo;
Hwang, Keum Cheol

Publication type:

Article

A Four-Port Dual-Band Dual-Polarized Antenna for Ku-Band Satellite Communications.

Published in:

Applied Sciences (2076-3417), 2024, v. 14, n. 7, p. 2730, doi. 10.3390/app14072730

By:

Trinh-Van, Son;
Yang, Woo Yong;
Cho, Hyung Won;
Hwang, Keum Cheol

Publication type:

Article

A 3-D Metal-Printed Dual-Polarized Ridged Waveguide Slot Array Antenna for X-Band Applications.

Published in:

Applied Sciences (2076-3417), 2023, v. 13, n. 8, p. 4996, doi. 10.3390/app13084996

By:

Van Trinh, Thai;
Park, Jinsu;
Song, Chan Mi;
Song, Sungchan;
Hwang, Keum Cheol

Publication type:

Article

A Wideband Reflectarray Antenna for Satellite Application with Low Cross-Polarization.

Published in:

Applied Sciences (2076-3417), 2023, v. 13, n. 7, p. 4545, doi. 10.3390/app13074545

By:

Elahi, Manzoor;
Jeong, Taeyong;
Yang, Youngoo;
Lee, Kang-Yoon;
Hwang, Keum Cheol

Publication type:

Article

Design of a Low-Cost, Low-Sidelobe-Level, Differential-Fed SIW Slot Array Antenna with Zero Beam Squint.

Published in:

Applied Sciences (2076-3417), 2022, v. 12, n. 21, p. 10826, doi. 10.3390/app122110826

By:

Trinh, Thai Van;
Trinh-Van, Son;
Lee, Kang-Yoon;
Yang, Youngoo;
Hwang, Keum Cheol

Publication type:

Article

A Circular Sector-Shaped Dipole Antenna with Meandered Arms and Added Ferrite-Loaded Artificial Magnetic Conductor.

Published in:

Applied Sciences (2076-3417), 2022, v. 12, n. 18, p. 9149, doi. 10.3390/app12189149

By:

Lee, Dong Hwan;
Kwon, Oh Heon;
Park, Won Bin;
Hwang, Keum Cheol

Publication type:

Article

Design of a Wide-Beamwidth Pixelated Dielectric Resonator Antenna Using a Modified Stepped-Impedance Filter to Suppress Harmonics.

Published in:

Applied Sciences (2076-3417), 2022, v. 12, n. 15, p. 7765, doi. 10.3390/app12157765

By:

Lee, Dong Geun;
Jeong, Taeyong;
Hwang, Keum Cheol

Publication type:

Article

Derivation of a Universally Valid Array Factor of a Conformal Arrays Based on Phase Compensation and Genetic Learning Particle Swarm Optimization.

Published in:

Applied Sciences (2076-3417), 2022, v. 12, n. 13, p. N.PAG, doi. 10.3390/app12136501

By:

Park, Jinsu;
Lim, Hong Jun;
Trinh-Van, Son;
Park, Daesung;
Jung, Youn Kwon;
Lim, Dongju;
Hwang, Keum Cheol

Publication type:

Article

Quasi-Isotropic Hybrid Dielectric Resonator Antenna—Bow-Tie Patch with Harmonic Suppression.

Published in:

Applied Sciences (2076-3417), 2022, v. 12, n. 8, p. 3842, doi. 10.3390/app12083842

By:

Jeong, Taeyong;
Lee, Jong Seon;
Lee, Dong Geun;
Kim, Jun Hee;
Park, Jinsu;
Hwang, Dong Hyee;
Hwang, Keum Cheol

Publication type:

Article

Near-Field-Based 5G Sub-6 GHz Array Antenna Diagnosis Using Transfer Learning.

Published in:

Applied Sciences (2076-3417), 2021, v. 11, n. 21, p. 10164, doi. 10.3390/app112110164

By:

Lim, Hong Jun;
Lee, Dong Hwan;
Park, Hark Byeong;
Hwang, Keum Cheol

Publication type:

Article

Compact and High Gain 4 × 4 Circularly Polarized Microstrip Patch Antenna Array for Next Generation Small Satellite.

Published in:

Applied Sciences (2076-3417), 2021, v. 11, n. 19, p. 8869, doi. 10.3390/app11198869

By:

Elahi, Manzoor;
Trinh-Van, Son;
Yang, Youngoo;
Lee, Kang-Yoon;
Hwang, Keum-Cheol

Publication type:

Article

Shape and Weighting Optimization of a Subarray for an mm-Wave Phased Array Antenna.

Published in:

Applied Sciences (2076-3417), 2021, v. 11, n. 15, p. 6803, doi. 10.3390/app11156803

By:

Jeong, Taeyong;
Yun, Juho;
Oh, Kyunghyun;
Kim, Jihyung;
Woo, Dae Woong;
Hwang, Keum Cheol

Publication type:

Article

Shape Optimization of an Integrated Mast for RCS Reduction of a Stealth Naval Vessel.

Published in:

Applied Sciences (2076-3417), 2021, v. 11, n. 6, p. 2819, doi. 10.3390/app11062819

By:

Shin, Hokeun;
Yoon, Daeyeong;
Kim, Chanyeong;
Yang, Young Sub;
Lee, Man Gyu;
Park, Joon Young;
Hwang, Keum Cheol;
Park, Yong Bae;
Capria, Amerigo

Publication type:

Article

A Low-Profile HF Meandered Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor.

Published in:

Applied Sciences (2076-3417), 2021, v. 11, n. 5, p. 2237, doi. 10.3390/app11052237

By:

Kwon, Oh Heon;
Park, Won Bin;
Yun, Juho;
Lim, Hong Jun;
Hwang, Keum Cheol;
Capria, Amerigo

Publication type:

Article

Low-Profile Spidron Fractal Dipole Antenna with a Ferrite-Loaded Artificial Magnetic Conductor for Manpack Applications.

Published in:

Applied Sciences (2076-3417), 2020, v. 10, n. 24, p. 8843, doi. 10.3390/app10248843

By:

Kwon, Oh Heon;
Hwang, Keum Cheol

Publication type:

Article

Design and Characterization of VHF Band Small Antenna Using CRLH Transmission Line and Non-Foster Matching Circuit.

Published in:

Applied Sciences (2076-3417), 2020, v. 10, n. 18, p. 6366, doi. 10.3390/app10186366

By:

Lee, Soyeong;
Lee, Jonghyup;
Choi, Seongro;
Lee, Yong-Hyeok;
Chung, Jae-Young;
Hwang, Keum Cheol;
Park, Yong Bae

Publication type:

Article

Ferrite-Loaded Spidron Fractal Loop VHF Antenna for UAV Applications.

Published in:

Applied Sciences (2076-3417), 2020, v. 10, n. 15, p. 5392, doi. 10.3390/app10155392

By:

Park, Won Bin;
Park, Young-Mi;
Hwang, Keum Cheol

Publication type:

Article

A Low-Profile Ferrite Dipole VHF Antenna for Integrated Mast Applications.

Published in:

Applied Sciences (2076-3417), 2020, v. 10, n. 5, p. 1642, doi. 10.3390/app10051642

By:

Park, Won Bin;
Trinh-Van, Son;
Yang, Youngoo;
Lee, Kang-Yoon;
Yu, Byunggil;
Park, Jinwoo;
You, Hojeong;
Hwang, Keum Cheol

Publication type:

Article

Bandwidth-Enhanced Circularly Polarized Crescent-Shaped Slot Antenna via Circular-Patch Loading.

Published in:

Applied Sciences (2076-3417), 2019, v. 9, n. 6, p. 1117, doi. 10.3390/app9061117

By:

Trinh-Van, Son;
Yang, Youngoo;
Lee, Kang-Yoon;
Kim, Yong Serk;
Hwang, Keum Cheol

Publication type:

Article

High-Gain Waveguide-Fed Circularly Polarized Spidron Fractal Aperture Antenna.

Published in:

Applied Sciences (2076-3417), 2019, v. 9, n. 4, p. 691, doi. 10.3390/app9040691

By:

Trinh-Van, Son;
Thi, Thuy Nguyen;
Yang, Youngoo;
Lee, Kang-Yoon;
Jung, Kyung-Young;
Hwang, Keum Cheol

Publication type:

Article

Robust Design of 3D-Printed 6–18 GHz Double-Ridged TEM Horn Antenna.

Published in:

Applied Sciences (2076-3417), 2018, v. 8, n. 9, p. 1582, doi. 10.3390/app8091582

By:

Lee, Sungwoo;
Yang, Youngoo;
Lee, Kang-Yoon;
Jung, Kyung-Young;
Hwang, Keum Cheol

Publication type:

Article

Improvement of RF Wireless Power Transmission Using a Circularly Polarized Retrodirective Antenna Array with EBG Structures.

Published in:

Applied Sciences (2076-3417), 2018, v. 8, n. 3, p. 324, doi. 10.3390/app8030324

By:

Trinh-Van, Son;
Lee, Jong Min;
Yang, Youngoo;
Lee, Kang-Yoon;
Hwang, Keum Cheol

Publication type:

Article

3D-Printed Super-Wideband Spidron Fractal Cube Antenna with Laminated Copper.

Published in:

Applied Sciences (2076-3417), 2017, v. 7, n. 10, p. 979, doi. 10.3390/app7100979

By:

Oh Heon Kwon;
Won Bin Park;
Sungwoo Lee;
Jong Min Lee;
Young Mi Park;
Keum Cheol Hwang

Publication type:

Article

Dual Circularly-Polarized Spidron Fractal Slot Antenna.

Published in:

Electromagnetics, 2017, v. 37, n. 1, p. 40, doi. 10.1080/02726343.2017.1261267

By:

Nguyen-Trung, Thanh;
Yang, Youngoo;
Lee, Kang-Yoon;
Hwang, Keum Cheol

Publication type:

Article

Design of a Subarray Configuration for Multifunction Radars Using a Nested Optimization Scheme.

Published in:

Electromagnetics, 2016, v. 36, n. 4, p. 276, doi. 10.1080/02726343.2016.1158617

By:

Kwon, Gina;
Park, Joon-Young;
Hwang, Keum Cheol

Publication type:

Article

Mellin Transform Approach for the Capacitance Computation of Asymmetric Coplanar Striplines.

Published in:

Electromagnetics, 2014, v. 34, n. 8, p. 617, doi. 10.1080/02726343.2014.948774

By:

Kwon, Gina;
Hwang, Keum Cheol;
Yang, Youngoo;
Lee, Kang-Yoon

Publication type:

Article

Circularly polarized CHANEL-logo antenna for GNSS applications.

Published in:

Journal of Electromagnetic Waves & Applications, 2017, v. 31, n. 14, p. 1434, doi. 10.1080/09205071.2017.1349000

By:

Lee, Sungwoo;
Yang, Youngoo;
Lee, Kang-Yoon;
Hwang, Keum Cheol

Publication type:

Article

Compact Folded Monopole Antenna Excited by a Conductor-Backed Coplanar Waveguide with Vias.

Published in:

ETRI Journal, 2013, v. 35, n. 3, p. 534, doi. 10.4218/etrij.13.0212.0485

By:

Kim, Jin Hyuk;
Hwang, Keum Cheol

Publication type:

Article

Compact Circularly Polarized Antenna with a Capacitive Feed for GPS/GLONASS Applications.

Published in:

ETRI Journal, 2012, v. 34, n. 5, p. 767, doi. 10.4218/etrij.12.0212.0058

By:

Seong Jae Jeong;
Keum Cheol Hwang;
Do-In Hwang

Publication type:

Article

Novel Shorted Meander-Line USB Dongle Antenna with a Compact Ground Plane.

Published in:

ETRI Journal, 2010, v. 32, n. 4, p. 610, doi. 10.4218/etrij.10.0210.0100

By:

Seong Jae Jeong;
Keum Cheol Hwang

Publication type:

Article

High-efficiency rectifier (5.2 GHz) using a Class- F Dickson charge pump.

Published in:

Microwave & Optical Technology Letters, 2017, v. 59, n. 12, p. 3018, doi. 10.1002/mop.30862

By:

Bae, Jongseok;
Koo, Hyungmo;
Lee, Hwiseob;
Lim, Wonseob;
Lee, Wooseok;
Kang, Hyunuk;
Hwang, Keum Cheol;
Lee, Kang‐Yoon;
Yang, Youngoo

Publication type:

Article

Dual circularly polarized falcate-shaped slot antenna.

Published in:

Microwave & Optical Technology Letters, 2016, v. 58, n. 9, p. 2245, doi. 10.1002/mop.30010

By:

Lee, Sungwoo;
Min Lee, Jong;
Yun, Juho;
Heon Kwon, Oh;
Jun Lim, Hong;
Bin Park, Won;
Cheol Hwang, Keum

Publication type:

Article

Efficiency enhanced CMOS digitally controlled dynamic bias switching power amplifier for LTE.

Published in:

Microwave & Optical Technology Letters, 2015, v. 57, n. 10, p. 2315, doi. 10.1002/mop.29330

By:

Kim, Hyungchul;
Bae, Jongsuk;
Ham, Junghyun;
Gu, Jehyeon;
Seo, Mincheol;
Hwang, Keum Cheol;
Lee, Kang‐Yoon;
Park, Cheon‐Seok;
Yang, Youngoo

Publication type:

Article

Dual-mode supply modulator for CMOS envelope tracking power amplifier integrated circuit.

Published in:

Microwave & Optical Technology Letters, 2015, v. 57, n. 6, p. 1338, doi. 10.1002/mop.29107

By:

Ham, Junghyun;
Bae, Jongsuk;
Seo, Mincheol;
Lee, Hwiseob;
Hwang, Keum Cheol;
Lee, Kang‐Yoon;
Yang, Youngoo

Publication type:

Article

Stub-loaded bent monopole antenna with independent frequency tuning capability for compact wireless USB dongles.

Published in:

Microwave & Optical Technology Letters, 2012, v. 54, n. 11, p. 2548, doi. 10.1002/mop.27159

By:

Jeong, Seong Jae;
Hwang, Keum Cheol

Publication type:

Article

A stub-loaded perturbed monopole antenna for wireless USB dongles.

Published in:

Microwave & Optical Technology Letters, 2011, v. 53, n. 3, p. 519, doi. 10.1002/mop.25760

By:

Hwang, Keum Cheol

Publication type:

Article