The effect of second-harmonic loading on power amplifiers operated with a low-voltage supply is investigated. Closed-form expressions and design formulas are derived, making use of a simplified device model. The correctness of the assumptions and the validity range of the derived expressions is then
Design of a high efficiency power amplifier with input and output harmonic terminations
✍ Scribed by S. F. Ooi; S. K. Lee; A. Sambell; E. Korolkiewicz; P. Butterworth
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 395 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
In this article it is shown, how, using the load/source pull method to generate the current/voltage waveforms of a class‐F power amplifier, the optimum load, and source impedances at the first three harmonics are obtained. Novel harmonic controllable matching networks are then used to obtain the required impedances, thus improving the power‐added efficiency to 70.4%. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 391–395, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22123
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