An X-band 185° CMOS phase shifter MMIC for multiple-antenna systems
✍ Scribed by Chien-San Lin; Wen-Chun Hsiao; Sheng-Fuh Chang
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 396 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The design and implementation of an X‐band phase shifter MMIC using the standard 0.18‐μm CMOS process is presented. A transformed doublet varactor load is analyzed and applied to a 3‐dB quadrature coupler to exhibit large phase shift tuning range and low insertion loss with minimal variation. By using the derived design equations, the implemented CMOS reflection‐type phase shifter demonstrates a continuous phase shift tuning range greater than 185°, an average insertion loss of 5.2 dB with ±0.4 dB variation, and return losses better than 13 dB in 9–11 GHz. The total chip size including I/O pads is 0.76 × 0.79 mm^2^. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 645–648, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24131