The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
ET(엔벨로프 추적) 기술은 높은 PAR(피크 대 평균 비율) 신호를 사용하여 전력 증폭기(PA)에서 높은 효율성을 달성할 수 있는 잠재력을 제공합니다. 높은 충실도, 고효율 및 넓은 대역폭을 갖춘 엔벨로프 증폭기는 엔벨로프 추적을 광범위하게 적용하는 데 중요한 구성 요소입니다. 본 논문에서는 포락선 증폭기에 사용하기 위한 선형 지원 스위칭 벅 컨버터의 설계를 제시합니다. 벅 컨버터의 높은 효율과 선형 증폭기의 넓은 대역폭 기능을 효과적으로 활용하기 위해 이 두 장치의 병렬 조합이 이 작업에 사용되었습니다. 이 하이브리드 전원 공급 장치를 조정하기 위해 새로운 전류 감지 COT(Constant-On-Time) 컨트롤러가 제안되었습니다. 이 조합을 통해 주로 스위칭 컨버터는 PA에 필요한 평균 전력을 고효율로 제공할 수 있으며, 광대역 선형 증폭기는 광범위한 동적 전압을 제공할 수 있습니다. 이 기술은 특히 더 넓은 대역폭 신호와 함께 높은 PAR이 필요한 애플리케이션의 경우 엔벨로프 증폭기의 효율성을 향상시킵니다. 포락선 증폭기 측정 결과, LTE 다운링크 신호를 사용하여 77W 출력 전력에서 약 10%의 효율을 보였습니다. 전체 ET 시스템은 GaN PA를 사용하여 시연되었습니다. 측정된 증폭기의 평균 전력 추가 효율은 평균 출력 전력 45W 및 이득 20dB에서 8.0MHz 대역폭 및 PAR 5dB의 LTE 변조 신호에 대해 10.1% 이상에 도달했습니다. 측정된 정규화된 RMS 오류는 2.1MHz의 오프셋 주파수에서 인접 채널 누설 비율이 -48dBc인 경우 20% 미만입니다.
Deng-Fong LU
National Central University
Chin HSIA
National Central University
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부
Deng-Fong LU, Chin HSIA, "Design of a Wideband Constant-on-Time Control Envelope Amplifier for Wireless Basestation Envelope Tracking Power Amplifiers" in IEICE TRANSACTIONS on Electronics,
vol. E102-C, no. 10, pp. 707-716, October 2019, doi: 10.1587/transele.2019MMP0008.
Abstract: Envelope tracking (ET) technology provides the potential for achieving high efficiency in power amplifiers (PAs) with high peak-to-average ratio (PAR) signals. Envelope amplifiers with high fidelity, high efficiency, and wide bandwidth are critical components for the widespread application of envelope tracking. This paper presents the design of a linear-assisted switching buck converter for use in an envelope amplifier. To effectively leverage the high efficiency of buck converters and the wide bandwidth capabilities of linear amplifiers, a parallel combination of these two devices is employed in this work. A novel current-sense constant-on-time (COT) controller is proposed to coordinate this hybrid power supply. The combination mainly enables the switching converter to provide the average power required by the PA with high efficiency, while the wideband linear amplifier provides a wide range of dynamic voltages. The technique improves the efficiency of the envelope amplifier, especially for applications requiring high PAR with wider bandwidth signals. Measurement of the envelope amplifier showed an efficiency of approximately 77% with 10 W output power using LTE downlink signals. The overall ET system was demonstrated by using a GaN PA. The measured average power-added efficiency of the amplifier reached above 45% for an LTE modulated signal with 20 MHz bandwidth and PAR of 8.0 dB, at an average output power of 5 W and gain of 10.1 dB. The measured normalized RMS error is below 2.1% with adjacent channel leakage ratio of -48 dBc at an offset frequency of 20 MHz.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2019MMP0008/_p
부
@ARTICLE{e102-c_10_707,
author={Deng-Fong LU, Chin HSIA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Design of a Wideband Constant-on-Time Control Envelope Amplifier for Wireless Basestation Envelope Tracking Power Amplifiers},
year={2019},
volume={E102-C},
number={10},
pages={707-716},
abstract={Envelope tracking (ET) technology provides the potential for achieving high efficiency in power amplifiers (PAs) with high peak-to-average ratio (PAR) signals. Envelope amplifiers with high fidelity, high efficiency, and wide bandwidth are critical components for the widespread application of envelope tracking. This paper presents the design of a linear-assisted switching buck converter for use in an envelope amplifier. To effectively leverage the high efficiency of buck converters and the wide bandwidth capabilities of linear amplifiers, a parallel combination of these two devices is employed in this work. A novel current-sense constant-on-time (COT) controller is proposed to coordinate this hybrid power supply. The combination mainly enables the switching converter to provide the average power required by the PA with high efficiency, while the wideband linear amplifier provides a wide range of dynamic voltages. The technique improves the efficiency of the envelope amplifier, especially for applications requiring high PAR with wider bandwidth signals. Measurement of the envelope amplifier showed an efficiency of approximately 77% with 10 W output power using LTE downlink signals. The overall ET system was demonstrated by using a GaN PA. The measured average power-added efficiency of the amplifier reached above 45% for an LTE modulated signal with 20 MHz bandwidth and PAR of 8.0 dB, at an average output power of 5 W and gain of 10.1 dB. The measured normalized RMS error is below 2.1% with adjacent channel leakage ratio of -48 dBc at an offset frequency of 20 MHz.},
keywords={},
doi={10.1587/transele.2019MMP0008},
ISSN={1745-1353},
month={October},}
부
TY - JOUR
TI - Design of a Wideband Constant-on-Time Control Envelope Amplifier for Wireless Basestation Envelope Tracking Power Amplifiers
T2 - IEICE TRANSACTIONS on Electronics
SP - 707
EP - 716
AU - Deng-Fong LU
AU - Chin HSIA
PY - 2019
DO - 10.1587/transele.2019MMP0008
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E102-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2019
AB - Envelope tracking (ET) technology provides the potential for achieving high efficiency in power amplifiers (PAs) with high peak-to-average ratio (PAR) signals. Envelope amplifiers with high fidelity, high efficiency, and wide bandwidth are critical components for the widespread application of envelope tracking. This paper presents the design of a linear-assisted switching buck converter for use in an envelope amplifier. To effectively leverage the high efficiency of buck converters and the wide bandwidth capabilities of linear amplifiers, a parallel combination of these two devices is employed in this work. A novel current-sense constant-on-time (COT) controller is proposed to coordinate this hybrid power supply. The combination mainly enables the switching converter to provide the average power required by the PA with high efficiency, while the wideband linear amplifier provides a wide range of dynamic voltages. The technique improves the efficiency of the envelope amplifier, especially for applications requiring high PAR with wider bandwidth signals. Measurement of the envelope amplifier showed an efficiency of approximately 77% with 10 W output power using LTE downlink signals. The overall ET system was demonstrated by using a GaN PA. The measured average power-added efficiency of the amplifier reached above 45% for an LTE modulated signal with 20 MHz bandwidth and PAR of 8.0 dB, at an average output power of 5 W and gain of 10.1 dB. The measured normalized RMS error is below 2.1% with adjacent channel leakage ratio of -48 dBc at an offset frequency of 20 MHz.
ER -