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논문 기본 정보

자료유형
학술저널
저자정보
Seungmin Woo (Sungkyunkwan University) Woojin Choi (Sungkyunkwan University) Jaekyung Shin (Sungkyunkwan University) Yifei Chen (Sungkyunkwan University) Youngchan Choi (Sungkyunkwan University) Sooncheol Bae (Sungkyunkwan University) Hyungjin Jeon (Sungkyunkwan University) Youngyun Woo (Sungkyunkwan University) Youngoo Yang (Sungkyunkwan University)
저널정보
한국전자파학회JEES Journal of Electromagnetic Engineering And Science Journal of Electromagnetic Engineering And Science Vol.24 No.4
발행연도
2024.7
수록면
401 - 410 (10page)

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초록· 키워드

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Owing to the high impedance transformation ratio, the Doherty power amplifier (DPA) with a large output power back-off generally has bandwidth limitations. This study proposes an asymmetric DPA with an impedance distribution and control circuit (IDCC) at the post-matching network to improve the bandwidth. The IDCC, based on a resonance circuit and a series transmission line, distributes and controls the load impedance according to the frequency so that the bandwidth of the DPA can be extended. To verify the proposed IDCC, an asymmetric DPA was designed using GaN HEMT with a power capacity of 6 W and 10 W for the carrier and peaking amplifiers, respectively. The implemented DPA was evaluated for the broad frequency band between 3.3 GHz and 3.8 GHz using a 5G new radio (NR) signal with a bandwidth of 100 MHz and a peak-to-average power ratio of 7.8 dB. A drain efficiency between 43.2% and 50.7% and an adjacent channel leakage power ratio between –23.4 dBc and –27.3 dBc were achieved at an average power level that ranged between 33.5 dBm and 34.3 dBm.

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Abstract
I. INTRODUCTION
II. IMPEDANCE DISTRIBUTION AND CONTROL CIRCUIT
III. DESIGN AND BANDWIDTH EXTENSION FOR THE DPA
IV. IMPLEMENTATION AND EXPERIMENTAL RESULTS
V. CONCLUSION
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