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
Teknologi penjejakan sampul surat (ET) menyediakan potensi untuk mencapai kecekapan tinggi dalam penguat kuasa (PA) dengan isyarat nisbah puncak kepada purata (PAR) yang tinggi. Penguat sampul dengan kesetiaan tinggi, kecekapan tinggi dan lebar jalur lebar merupakan komponen kritikal untuk aplikasi penjejakan sampul surat secara meluas. Kertas kerja ini membentangkan reka bentuk penukar buck pensuisan berbantukan linear untuk digunakan dalam penguat sampul surat. Untuk memanfaatkan kecekapan tinggi penukar buck dan keupayaan lebar jalur lebar penguat linear dengan berkesan, gabungan selari kedua-dua peranti ini digunakan dalam kerja ini. Pengawal pemalar masa (COT) deria semasa baru dicadangkan untuk menyelaraskan bekalan kuasa hibrid ini. Gabungan terutamanya membolehkan penukar pensuisan menyediakan kuasa purata yang diperlukan oleh PA dengan kecekapan tinggi, manakala penguat linear jalur lebar menyediakan pelbagai voltan dinamik. Teknik ini meningkatkan kecekapan penguat sampul surat, terutamanya untuk aplikasi yang memerlukan PAR tinggi dengan isyarat lebar jalur yang lebih luas. Pengukuran penguat sampul menunjukkan kecekapan kira-kira 77% dengan kuasa keluaran 10 W menggunakan isyarat pautan bawah LTE. Sistem ET keseluruhan telah ditunjukkan dengan menggunakan GaN PA. Purata kecekapan tambah kuasa yang diukur bagi penguat mencapai melebihi 45% untuk isyarat termodulat LTE dengan lebar jalur 20 MHz dan PAR 8.0 dB, pada purata kuasa output 5 W dan keuntungan 10.1 dB. Ralat RMS ternormal yang diukur adalah di bawah 2.1% dengan nisbah kebocoran saluran bersebelahan -48 dBc pada frekuensi ofset 20 MHz.
Deng-Fong LU
National Central University
Chin HSIA
National Central University
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Salinan
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
Salinan
@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},}
Salinan
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 -