Name
Title | ||
|---|---|---|
Efficiency Enhancement Of A Digital Predistortion Doherty Amplifier Transmitter Using A Virtual Open Stub Technique |
Abstract | ||
|---|---|---|
This paper proposes a design method of a Doherty amplifier, which can determine the most efficient backed-off point of the amplifier by adjusting a load modulation parameter. The parameter is defined through the design of output transmission line of a carrier and a peak amplifier using a virtual open stub technique. This paper describes the design results using the technique to optimize efficiency of a Doherty amplifier for an orthogonal frequency division multiplexing (OFDM) signal, and parameter adjustment for a linearized Doherty amplifier using an adaptive digital predistortion (ADPD). Applying this method, the developed 250W ADPD Doherty amplifier has achieved drain efficiency of 43.4% and intermodulation (IM) distortion of -48.3 dBc with output power of 44.1 dBm (10.1 dB output backed-off) at 563 MHz using an OFDM signal for integrated services digital broadcasting-terrestrial (ISDB-T). |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1093/ietele/e90-c.9.1670 | IEICE TRANSACTIONS ON ELECTRONICS |
Keywords | Field | DocType |
power amplifier, microwave Doherty amplifier, efficiency, orthogonal frequency division multiplexing (OFDM), predistortion | Doherty amplifier,Direct-coupled amplifier,Operational transconductance amplifier,Linear amplifier,Electronic engineering,Cascade amplifier,Power-added efficiency,Engineering,Electrical engineering,Operational amplifier,Amplifier | Journal |
Volume | Issue | ISSN |
E90C | 9 | 0916-8524 |
Citations | PageRank | References |
1 | 0.40 | 0 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Kenichi Horiguchi | 1 | 2 | 0.83 |
| Satoru Ishizaka | 2 | 1 | 0.40 |
| Masatoshi Nakayama | 3 | 1 | 1.08 |
| Ryoji Hayashi | 4 | 3 | 2.54 |
| yoji isota | 5 | 10 | 6.12 |
| Tadashi Takagi | 6 | 22 | 12.04 |