Envelope tracking technology is seen as the most promising efficiency enhancement technology for RF power amplifiers for 4G and beyond wireless communications. More and more organizations are investing and researching on this topic with huge potential in academic and commercial areas. This is the first book on the market to offer complete introduction, theory, and design considerations on envelope tracking for wireless communications. This resource presents you with a full introduction to the subject and covers underlying theory and practical design considerations.Figure 1.7 Voltage mode class-D SMPA with a series LC-resonant circuit requires two FET transistors working in 180Ad outphased switch mode. ... When the switch FET1 is off, only voltage is present over the transistor. ... In practice, a transistor is not a perfect switch, refer- ring to the load line in Figure 1.8, and the overlapping does limit efficiency from the ideal value ... Class-Da1 SMPA has an obvious advantage over its class-D counterpart because it can tune out the transis- tor outputanbsp;...
|Title||:||Envelope Tracking Power Amplifiers for Wireless Communications|
|Publisher||:||Artech House - 2014-06-01|