This paper presents several power amplifier approaches that promise to significantly improve efficiency, while meeting the linearity requirements of advanced, spectrally efficient wireless systems. The approaches include: a) use of active integrated antenna structures that provide harmonic terminations for high efficiency Class F amplifiers; b) integrated dc-dc converters for power conditioning and envelope restoration; c) switching mode amplifiers based on bipolar transistors with controlled saturation; and d) the use of bandpass delta-sigma modulators to tailor input signals.
|Number of pages||4|
|Journal||IEEE MTT-S International Microwave Symposium Digest|
|State||Published - 1 Jan 1998|
|Event||Proceedings of the 1998 IEEE MTT-S International Microwave Symposium. Part 1 (of 3) - Baltimore, MD, USA|
Duration: 7 Jun 1998 → 12 Jun 1998