Search Results - "Hahn, Yunsik"
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1
A Novel 3-Way Dual-Band Doherty Power Amplifier for Enhanced Concurrent Operation
Published in IEEE transactions on microwave theory and techniques (01-09-2021)“…This article presents the architecture and design methodology for a new type of dual-band Doherty power amplifier (DB-DPA), referred to as 3-Way DB-DPA, which…”
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Journal Article -
2
Analysis and Digital Predistortion of In-band Cross Modulation in Concurrent Multi-Band Transmitters
Published in IEEE access (2022)“…In multiband transmitters where two or more radios share the same power amplifier (PA), interferences can usually be kept below an acceptable level with the…”
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Journal Article -
3
Accelerated Design Methodology for Dual-Input Doherty Power Amplifiers
Published in IEEE transactions on microwave theory and techniques (01-10-2019)“…A novel design theory and the methodology are presented for dual-input Doherty power amplifiers (DPAs) in which the auxiliary transistor does not fully turn…”
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Journal Article -
4
New Mixed-Mode Design Methodology for High-Efficiency Outphasing Chireix Amplifiers
Published in IEEE transactions on circuits and systems. I, Regular papers (01-04-2019)“…A new design methodology providing optimal mixed-mode operation for dual-input class-F outphasing Chireix amplifiers is presented. The design starts with…”
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Journal Article -
5
Novel Outphasing Power Amplifiers Designed With an Analytic Generalized Doherty-Chireix Continuum Theory
Published in IEEE transactions on circuits and systems. I, Regular papers (01-08-2019)“…An analytic theory for dual-input outphasing power amplifiers that incorporate in one unified treatment, the continuum of solutions for power combining…”
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Journal Article -
6
Wideband Two-Way Hybrid Doherty Outphasing Power Amplifier
Published in IEEE transactions on microwave theory and techniques (01-02-2021)“…A new type of wideband dual-input hybrid Doherty outphasing power amplifier (HDO-PA) is developed in which the load-modulation scheme continuously converts as…”
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Journal Article -
7
Single-Input Broadband Hybrid Doherty Power Amplifiers Design Relying on a Phase Sliding-Mode of the Load Modulation Scheme
Published in IEEE transactions on microwave theory and techniques (01-04-2023)“…This work introduces a novel design theory for a single-input hybrid Doherty power amplifier (PA) inspired by the design space existing within the previously…”
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Journal Article -
8
Time-Domain Characterization and Linearization of a Dual-Input Power Amplifier Using a Vector Network Analyzer as the Receiver
Published in IEEE transactions on microwave theory and techniques (01-04-2021)“…A newly calibrated testbed based on a commercial vector network analyzer (VNA) is proposed for the fast in-band vector signal characterization and…”
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Journal Article -
9
Frequency-Agile Class-J Power Amplifier With Clockwise Fundamental- and Second-Harmonic Loads
Published in IEEE transactions on microwave theory and techniques (01-07-2020)“…A novel frequency-agile power amplifier (PA) designed with a modified class-J theory enforcing constant maximum and minimum instantaneous drain voltages for…”
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Journal Article -
10
Automatic Algorithm for the Direct Design of Asymmetric Doherty Power Amplifiers
Published in 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) (01-01-2019)“…This paper presents a novel method for the direct design of asymmetric Doherty power amplifiers (PAs). Single-transistor class F and {C} simulations for the…”
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Conference Proceeding -
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Optimal Two-Way Hybrid Doherty-Outphasing Power Amplifier
Published in 2020 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) (01-01-2020)“…This paper presents a two-way hybrid Doherty-outphasing power amplifier (HD-OPA) with an optimal efficiency. The HD-OPA consists of a main PA operating in…”
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Conference Proceeding -
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Calibrated Digital Predistortion Using a Vector Network Analyzer as the Receiver
Published in 2019 93rd ARFTG Microwave Measurement Conference (ARFTG) (01-06-2019)“…This paper reports the first demonstration of the behavior modeling and predistortion linearization of a power amplifier (PA) for periodic modulated signals…”
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Conference Proceeding