Improvement of RF Vector Modulator Performance by Feed-forward Based Calibration
Abstract
RF Vector Modulator enables independent control of a narrowband RF signal amplitude and phase. Unfortunately practical realization of an analog vector modulator suffers from misbalances and imperfections in the I and Q signal paths. Use of a feed-forward based calibration can compensate for them and significantly improve RF performance and control accuracy of a real vector modulator. Achieved improvements and results on a small series of vector modulator based phase shifters using feed-forward calibration are presented.
Keywords
Phase shifter, vector modulator, calibration, feed-forward, phase error, set pointPersistent identifier
http://hdl.handle.net/11012/57043Document type
Peer reviewedDocument version
Final PDFSource
Radioengineering. 2010, vol. 19, č. 4, s. 627-632. ISSN 1210-2512http://www.radioeng.cz/fulltexts/2010/10_04_627_632.pdf
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