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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Srirattana, N. Raghavan, A. Heo, D. Allen, P.E. Laskar, J. |
| Copyright Year | 2003 |
| Description | Author affiliation: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Srirattana, N.; Raghavan, A.; Heo, D.; Allen, P.E.; Laskar, J.) |
| Abstract | A comprehensive analysis of multistage Doherty amplifier, which can be used to achieve higher efficiency at greater back-off compared to the classical Doherty amplifier, is presented. A novel set of design equations for a generalized N-stage Doherty amplifier is introduced. For the first time, this technique is applied to the design of a WCDMA power amplifier (PA). The designed PA meets WCDMA requirements, and exhibits a power-added efficiency (PAE) of 34.5% at 6.dB back-off and 16.9% at 12 dB back-off. These PAEs are 2 times and 4 times better, respectively, than that of a single stage linear PA at the same back-off levels. The PA is capable of delivering up to 28.6 dBm of output power, and has a maximum adjacent channel power leakage ratio of -38 dBc and -51 dBc at 5 and 10 MHz offset, respectively. To the best of the authors' knowledge, these represent the best reported results of a Doherty amplifier for WCDMA application in the 1.95 GHz band, to date. |
| Starting Page | 1337 |
| Ending Page | 1340 |
| File Size | 251442 |
| Page Count | 4 |
| File Format | |
| ISBN | 1580538347 |
| DOI | 10.1109/EUMC.2003.177734 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-10-07 |
| Publisher Place | Germany |
| Access Restriction | Subscribed |
| Rights Holder | EUMA |
| Subject Keyword | High power amplifiers Multiaccess communication Power amplifiers Power generation Equations Power transmission lines Transmission line theory Impedance Power engineering computing Power engineering and energy |
| Content Type | Text |
| Resource Type | Article |
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