PhD Defense: "High Speed Transceiver Design for Broadband Communications"

Arda Simsek

June 18th (Tuesday), 10:00am
Engineering Science Building (ESB), Rm 2001

The increasing data consumption due to the development in smart devices demands broadband, high-data-rate communication links both in the end-point and backhaul links. Backhaul communication links over fiber can be further developed using optical technologies. mm-Wave wireless technologies can solve data demand both in end-user and base station. mm-Waves provide wide unlicensed and unallocated frequency bands, creating an opportunity for broadband wireless communications. At these frequencies signal range is limited and attenuation is high; but signal strength can be recovered using phased arrays. In addition, short wavelengths at these frequencies allow placement of massive number of antennas over small apertures, which allows massive number of simultaneous independent beams (MIMO). MIMO can provide a significant increase in the overall system data rate.

In the first part of the talk, I will briefly present a low-power optical phase-locked loop (OPLL), and a first chip-scale optical frequency synthesizer consuming less than 2 Watts of power within 10 cm3 volume, which uses this OPLL, for the optical backhaul solutions. In the second part, broadband transceiver using 22 nm FD-SOI CMOS technology will be presented, followed by link measurements using 45 nm CMOS SOI technology. Open eyes with more than 7.5 GBaud/s data rates over 20 cm air working above 140 GHz are demonstrated using horn antennas. Low-cost, yet efficient PCB based off-chip antenna array, and transition designs between transceivers and antennas, working above 140 GHz for the first time, are proposed. Finally, fully-packaged 4-channel MIMO receiver and 2-channel transmitter are demonstrated. One channel transceiver using these boards show open eyes up to 5 GBaud/s data rate with less than 10-3 bit-error-rate (BER) up to 2.5 GBaud/s over 25 cm wireless link. The modules designed in this dissertation are the first fully integrated phased array ICs at 140 GHz to the best of author’s knowledge. These modules can support multi beam communications for the next generation wireless communications with massive number of beams, each providing 1-10 Gb/s, approaching 1-10 Tb/s overall data rate.

About Arda Simsek:

photo of Arda SimsekArda Simsek received the B.S. degree in electrical engineering from Bilkent University, Ankara, Turkey, in 2014, and the M.S. degree in electrical and computer engineering from the University of California, Santa Barbara, CA, USA, in 2015, where he is currently a Ph.D candidate in electrical and computer engineering. He has broad range of research experience and interests including RF and millimeter-wave integrated circuits in silicon and III-V technologies for single and multi beam phased-arrays, optical phase-locked loops, electronic-photonic integration, and high frequency antenna-packaging co-design.

Hosted by: Prof. Mark J. W. Rodwell, High Frequency Electronics Lab