A LINC demonstrator based on switchable phase shifters

This paper presents a 2 GHz LINC transmitter demonstrator that generates a 16-QAM (Quadrature Amplitude Modulation) signal using switchable phase shifters fabricated on a low cost substrate (FR4, 1.6 mm, er = 4.6). The number of switch elements required has been reduced from 16 per branch to 6 per branch by a careful analysis of the complete set of combinations required. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 262–264, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10577