B
Bumman Kim
Researcher at Pohang University of Science and Technology
Publications - 395
Citations - 10494
Bumman Kim is an academic researcher from Pohang University of Science and Technology. The author has contributed to research in topics: Amplifier & RF power amplifier. The author has an hindex of 54, co-authored 395 publications receiving 9960 citations. Previous affiliations of Bumman Kim include Texas Instruments & Carnegie Mellon University.
Papers
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Proceedings ArticleDOI
Microwave Doherty Power Amplifier for High Efficiency and Linearity
TL;DR: The basic circuit configuration of microwave Doherty amplifier is explained and additional design methods for wide bandwidth and high power applications are presented and the recent experimental results of the group using the uneven power drive are presented.
Journal ArticleDOI
Millimeter-wave power operation of an AlGaAs/InGaAs/GaAs quantum well MISFET
TL;DR: In this paper, the authors have developed state-of-the-art millimeter-wave power transistors using quantum-well MISFETs, and the best device delivered a power density of 1.0 W/mm with 3.2 dB gain and 27% power-added efficiency at 60 GHz.
Journal ArticleDOI
A GaAs FET Model for Large-Signal Applications
TL;DR: A computer program, based on a circuit model with nonlinear elements, has been developed which provides information about the nonlinear behavior of GaAs FET's under large-signal conditions and its use in microwave circuit design is given.
Patent
Heterostructure field effect transistor
Hung-Dah Shih,Bumman Kim +1 more
TL;DR: In this paper, the authors proposed a method for making the heterostructure field effect transistor with a buffer layer consisting of a first compound semiconductor material and a second pseudomorphic semiconductor layer.
Journal ArticleDOI
Highly Efficient Dual-Switch Hybrid Switching Supply Modulator for Envelope Tracking Power Amplifier
TL;DR: In this article, a dual-switch hybrid switching supply modulator for an envelope tracking power amplifier (PA) is described, which employs two buck converters and realizes an adaptive slew rate control of the switching amplifier's current.