A Switch Mode Resonating H-Bridge Polar Transmitter using RF Sigma Delta Modulation
2010 (English)In: IEEE INT SYMP CIRC SYST PROC, 2010, 1911-1914 p.Conference paper (Refereed)
Using saturated power amplifier (PA) as the last stage, polar transmitter has the potential to be the most power efficient architecture to transmit large Peak-to-Average Ratio (PAR) signals. In this work, a polar transmitter using H-Bridge configured Class-D amplifiers is proposed. To fully exploit low voltage resource, maintain linearity and meet the spectrum mask requirements, RF Sigma-Delta Modulation (SDM) is used. An on-chip transformer based filter network is designed to filter out SDM noise and provide load matching. The system verification is carried out by using Matlab passband simulation on a 13dB PAR mobile WiMAX signal. Evaluation of noise shaping and spectral regrowth shows the proposed architecture can achieve -45dBc/10kHz ACPR in a 140MHz bandwidth range. This provides a solid ground for the circuit design work.
Place, publisher, year, edition, pages
2010. 1911-1914 p.
, IEEE International Symposium on Circuits and Systems, ISSN 0271-4302
Polar Architecture, Sigma-Delta Modulation, Class-D Power Amplifier
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-32139DOI: 10.1109/ISCAS.2010.5537969ISI: 000287216002034ScopusID: 2-s2.0-77955995322ISBN: 978-1-4244-5309-2OAI: oai:DiVA.org:kth-32139DiVA: diva2:409264
International Symposium on Circuits and Systems Nano-Bio Circuit Fabrics and Systems (ISCAS 2010)
QC 201104072011-04-072011-04-072013-01-29Bibliographically approved