Journal
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
Volume 52, Issue 9, Pages 2160-2163Publisher
JOHN WILEY & SONS INC
DOI: 10.1002/mop.25385
Keywords
(Bi)CMOS technologies; integrated transformers; magnetic coupling factor; mm-wave circuits; multilayer spirals; quality factor; transformer characteristic resistance
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In this letter, a novel structure for mm-wave integrated transformers is presented. The proposed transformers, namely, interstacked exploit mixed interleaved/stacked coils, which allow increasing the magnetic coupling with respect to stacked devices, providing full geometrical/electrical symmetry. An extensive comparison between interstacked and conventional structures demonstrates the benefits of the proposed configuration in terms of the most significant figures of merit for integrated transformers. (C) 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 2160-2163, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25385
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