A CMOS focal-plane array for heterodyne terahertz imaging

  title={A CMOS focal-plane array for heterodyne terahertz imaging},
  author={Ullrich R. Pfeiffer and Erik Ojefors and Alvydas Lisaukas and Diana Glaab and Hartmut G. Roskos},
  journal={2009 IEEE Radio Frequency Integrated Circuits Symposium},
In this paper we present a focal-plane array (FPA) for heterodyne imaging at 0.65-THz in a low-cost 0.25-µm CMOS process technology. The 3×5 pixel array is fully integrated on chip and consists of differential patch antennas, NMOS square-law mixers, and 43-dB low-IF amplifiers. The NMOS square-law mixers are based on distributed resistive self-mixing and facilitate mixing well beyond the cutoff frequency of the technology. First 0.65-THz heterodyne imaging results are presented. 
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