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e-Seminar

A 65nm CMOS 4-Element Sub-34mW/Element 60GHz Phased-Array Transceiver

March 16, 2011
4:00 PM EST (1:00 PM PST)

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Abstract

The availability of a large block of a universal unlicensed spectrum in 60GHz frequency band with 7 GHz of available bandwidth in U.S. is an obvious motivation for research in this area. Lately, mobile applications have drawn a lot of attention for high speed data transfer. Practical mm-wave systems for mobile applications will require relatively large phased arrays in order to robustly overcome path-loss and fading issues. Phased arrays allow beam-steering and spatial power combining and by that ease the design of the power amplifier and receiver circuits at mm-wave frequencies. However, CMOS implementations of phased arrays at mm-wave frequencies are area and power hungry and lack scalability. This talk describes a low-power, area efficient, fully-integrated 60GHz 4-element 65nm CMOS phased array transceiver consuming less than 34mW/element including LO synthesis and distribution. These results are achieved by utilizing an IF phase shifting architecture and holistic impedance optimization. IF phase shifting architecture has significant advantages of allowing much higher phase resolution which can be accurately controlled and calibrated.

Speaker

Maryam Tabesh
University of California, Berkeley

Maryam Tabesh received the B.S. degree in electrical engineering from Sharif University of Technology in 2005 and is currently working toward the Ph.D. degree at the University of California at Berkeley. Her research interest is in low-power phased-array systems for mm-wave applications. She spent summer 2007 with HMicro Inc in Los Altos and summer 2010 at the Corporate R&D division of Qualcomm in San Diego. She is the recipient of Qualcomm Innovation Fellowship 2010, the 2006–2007 Society of Women Engineers (SWE) Scholarship and the 2007 Alfred Dixon Memorial Scholarship.