High-Efficiency Hybrid EER Transmitter Using Optimized Power Amplifier
SCIE
SCOPUS
- Title
- High-Efficiency Hybrid EER Transmitter Using Optimized Power Amplifier
- Authors
- Kim, I; Woo, YY; Kim, J; Moon, J; Kim, J; Kim, B
- Date Issued
- 2008-11
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGI
- Abstract
- This paper describes a new design approach for a power amplifier (PA) of the highly efficient hybrid envelope elimination and restoration (H-EER) transmitter. Since the PA operates mostly at the average power region of the modulation signal, power-added efficiency (PAE) of the PA at the average drain voltage is very important for the overall transmitter PAE. Accordingly, the PA is designed to have a maximum PAE in that region. The performances of the proposed PA and a conventional PA under H-EER operation are evaluated via ADS and MATLAB simulations using a behavioral large-signal model of a silicon LDMOSFET, which verifies that the proposed PA has significant advantages for the H-EER transmitter in both PAE and output power. A saturated amplifier, inverse class F, has been implemented using a 5-W peak envelope power LDMOSFET for 3GPP forward-link single-carrier wideband code-division multiple-access; at 1 GHz with a peak-to-average power ratio of 9.8 dB. An envelope amplifier is built that has an efficiency of above 68% and peak output voltage of 31 V for an interlock experiment. The overall PAE of the transmitter with a conventional PA is 35.5% at an output power of 29.2 dBm. On the other hand, the transmitter with the proposed PA delivers significantly improved performances: PAE increased by 4% and output power by 2.5 dB. The H-EER transmitter has been linearized by the digital feedback predistortion technique. The measured error vector magnitude is reduced to 1.47% from 6.4%. These results clearly show that the proposed architecture is a good candidate for efficient linear transmitters.
- Keywords
- Adjacent channel leakage ratio (ACLR); digital feedback predistortion (DFBPD); efficiency; error vector magnitude (EVM); hybrid envelope elimination and restoration (H-EER); linearity; peak-to-average power ratio (PAPR); power-added efficiency (PAE); power amplifier (PA); RF transmitter; wideband code-division multiple-access (WCDMA); ENVELOPE ELIMINATION; MICROWAVE; RF
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/22393
- DOI
- 10.1109/TMTT.2008.20
- ISSN
- 0018-9480
- Article Type
- Article
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 56, no. 11, page. 2582 - 2593, 2008-11
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.