This paper reports a 6-to-18 GHz integrated phased- array receiver implemented in 130-nm CMOS. The receiver is easily scalable to build a very large-scale phased-array system. It concurrently forms four independent beams at two different frequencies from 6 to 18 GHz. The nominal conversion gain of the receiver ranges from 16 to 24 dB over the entire band while the worst-case cross-band and cross-polarization rejections are achieved 48 dB and 63 dB, respectively. Phase shifting is performed in the LO path by a digital phase rotator with the worst-case RMS phase error and amplitude variation of 0.5̂ and 0.4 dB, respectively, over the entire band. A four-element phased-array receiver system is implemented based on four receiver chips. The measured array patterns agree well with the theoretical ones with a peak-to-null ratio of over 21.5 dB.
Bibliographical noteFunding Information:
Manuscript received April 17, 2008; revised June 24, 2008. Current version published December 10, 2008. This work was supported by the Office of Naval Research under Contract N00014-04-C-0588. S. Jeon is with the School of Electrical Engineering, Korea University, Seongbuk-gu, Seoul, Korea (e-mail: firstname.lastname@example.org). Y.-J. Wang, H. Wang, F. Bohn, A. Babakhani, and A. Hajimiri are with the Department of Electrical Engineering, California Institute of Technology, Pasadena, CA 91125 USA. A. Natarajan is with the IBM T. J. Watson Research Center, Yorktown Heights, NY 10598 USA. Digital Object Identifier 10.1109/JSSC.2008.2004863
- Large-scale phased arrays
- Phased arrays
ASJC Scopus subject areas
- Electrical and Electronic Engineering