Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator
In this contribution, efficiency enhancement of a radio frequency (RF) power amplifier (PA) for Long Term Evolution (LTE) base stations using envelope tracking is investigated. The dynamically adapted drain bias voltage is provided by a three-level class-G modulator. The potential of this bias modul...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2013-07-01
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| Series: | Advances in Radio Science |
| Online Access: | http://www.adv-radio-sci.net/11/207/2013/ars-11-207-2013.pdf |
| _version_ | 1811246553313050624 |
|---|---|
| author | A. Bräckle L. Rathgeber F. Siegert S. Heck M. Berroth |
| author_facet | A. Bräckle L. Rathgeber F. Siegert S. Heck M. Berroth |
| author_sort | A. Bräckle |
| collection | DOAJ |
| description | In this contribution, efficiency enhancement of a radio frequency (RF) power
amplifier (PA) for Long Term Evolution (LTE) base stations using envelope
tracking is investigated. The dynamically adapted drain bias voltage is
provided by a three-level class-G modulator. The potential of this bias
modulator is demonstrated with a class AB PA built in gallium nitride (GaN)
technology with an operation frequency of 2.75 GHz, a maximum
output power of 41 dBm and a peak power-added efficiency (PAE) of
60%. When driven by an LTE signal with a bandwidth of
20 MHz, overall system efficiency can be increased from 17%
with a constant supply voltage up to 29% with envelope tracking. This is
accompanied by a reduction of linearity. Adjacent channel leakage ratio
(ACLR) decreases by 10 dB in the first and by 18 dB
in the second adjacent channel, respectively. Error vector magnitude (EVM)
increases from 9% up to 29%. |
| first_indexed | 2024-04-12T14:55:08Z |
| format | Article |
| id | doaj.art-316ccc0e459d47e29a41b1e4926ed33e |
| institution | Directory Open Access Journal |
| issn | 1684-9965 1684-9973 |
| language | deu |
| last_indexed | 2024-04-12T14:55:08Z |
| publishDate | 2013-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Radio Science |
| spelling | doaj.art-316ccc0e459d47e29a41b1e4926ed33e2022-12-22T03:28:15ZdeuCopernicus PublicationsAdvances in Radio Science1684-99651684-99732013-07-011120721210.5194/ars-11-207-2013Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulatorA. Bräckle0L. Rathgeber1F. Siegert2S. Heck3M. Berroth4University of Stuttgart, Institute of Electrical and Optical Communications Engineering, Stuttgart, GermanyUniversity of Stuttgart, Institute of Electrical and Optical Communications Engineering, Stuttgart, GermanyUniversity of Stuttgart, Institute of Electrical and Optical Communications Engineering, Stuttgart, GermanyUniversity of Stuttgart, Institute of Electrical and Optical Communications Engineering, Stuttgart, GermanyUniversity of Stuttgart, Institute of Electrical and Optical Communications Engineering, Stuttgart, GermanyIn this contribution, efficiency enhancement of a radio frequency (RF) power amplifier (PA) for Long Term Evolution (LTE) base stations using envelope tracking is investigated. The dynamically adapted drain bias voltage is provided by a three-level class-G modulator. The potential of this bias modulator is demonstrated with a class AB PA built in gallium nitride (GaN) technology with an operation frequency of 2.75 GHz, a maximum output power of 41 dBm and a peak power-added efficiency (PAE) of 60%. When driven by an LTE signal with a bandwidth of 20 MHz, overall system efficiency can be increased from 17% with a constant supply voltage up to 29% with envelope tracking. This is accompanied by a reduction of linearity. Adjacent channel leakage ratio (ACLR) decreases by 10 dB in the first and by 18 dB in the second adjacent channel, respectively. Error vector magnitude (EVM) increases from 9% up to 29%.http://www.adv-radio-sci.net/11/207/2013/ars-11-207-2013.pdf |
| spellingShingle | A. Bräckle L. Rathgeber F. Siegert S. Heck M. Berroth Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator Advances in Radio Science |
| title | Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator |
| title_full | Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator |
| title_fullStr | Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator |
| title_full_unstemmed | Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator |
| title_short | Envelope tracking of a radio frequency amplifier for Long Term Evolution using a three-level class-G modulator |
| title_sort | envelope tracking of a radio frequency amplifier for long term evolution using a three level class g modulator |
| url | http://www.adv-radio-sci.net/11/207/2013/ars-11-207-2013.pdf |
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