The short wavelengths associated with 220-300GHz carriers enable imaging systems having small radiating antennas yet high angular resolution. The key challenge is pixel count: a brute-force phased-array proving 100 pixels by 100 pixels resolution would require 10,000 RF signal channels.


We are exploring reduced-complexity imaging techniques, including sparse arrays, crossed linear arrays, and frequency-scanned arrays, to realize high pixel counts with moderate #s of elements.

Team Leader

Mark Rodwell

Mark Rodwell (Ph.D. Stanford University 1988) holds the Doluca Family Endowed Chair in Electrical and Computer Engineering at UCSB. He directs the SRC/DARPA Research Center for THz Communications and Sensing, and manages the UCSB Nanofabrication Lab.  His research group develops nm and THz transistors, and millimeter-wave and sub-mm-wave integrated circuits. The work of his group and collaborators has been recognized by the 2010 IEEE Sarnoff Award, the 2012 IEEE Marconi Prize Paper Award, the 1997 IEEE Microwave Prize, the 1998 European Microwave Conference Microwave Prize, and the 2009 IEEE IPRM Conference Award.



M. Rodwell, B. Markman, Y. Fang, L. Whitaker, H.Y. Tseng, & A. Ahmed, “Transistors for 100-300GHz Wireless,” presented at the 2021 IEEE 51st European Solid-State Device Research Conference (ESSDERC), Grenoble, France, September 13-22, 2021.

M. E. Rasekh, N. Hosseinzadeh, U. Madhow, & M. Rodwell, “An On-off Receiver Array for Low-power Scaling of mmWave Massive MIMO,” presented at the 2021 IEEE Workshop on Signal Processing Systems (SiPS), Coimbra, Portugal, October 19-21, 2021.

A. Ahmed, A. Farid, & M. Rodwell, “A 27.5dBm EIRP D-Band Transmitter Module on a Ceramic Interposer,” presented at the 2021 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), San Francisco, CA, June 7-9, 2021.

M. Seo, A. Farid, A. Ahmed, M. Urteaga, J. Bukwalter, M. Rodwell, “A 140GHz Power Amplifier with 20.5dBm Output Power and 20.8% PAE in 250-nm InP HBT Technology,” presented at the 2020 IEEE/MTT-S International Microwave Symposium (IMS), Los Angeles, CA, August 4-6, 2020.