0.13-μM CMOS Q-band leveled-LO subharmonic mixer with injection-locked frequency-divider quadrature generator
✍ Scribed by Jen-Yi Su; Chinchun Meng; Po-Yi Wu; Guo-Wei Huang
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 132 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
Abstract
In this article, a 40‐GHz subharmonic Gilbert down‐conversion mixer with an accurate quadrature local oscillator (LO) input is demonstrated using a standard 0.13‐μm CMOS technology. The quadrature‐output frequency divider is realized by injection‐locked oscillators and is used at the LO port to replace conventional RC‐CR polyphase filters at higher frequencies. Furthermore, the proper Marchand balun at an RF stage is suitable for the standard Si‐based process to generate precisely balanced signals despite the substrate loss. The measured conversion gain is 4 dB at 40 GHz. The IP~1dB~ and IIP~3~ of −7 dBm and 2 dBm, respectively, are achieved. The measured 3‐dB RF bandwidth is very broad and about 12‐GHz bandwidth when the 10‐MHz IF frequency is fixed. The die size is about 1 mm × 1 mm. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2663–2665, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24714