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Enhanced 3D CW terahertz imaging with ultra sparse arrays using a phase coherence method

: Baccouche, B.; Sauer-Greff, W.; Urbansky, R.; Friederich, F.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Microwave Theory and Techniques Society:
42nd International Conference on Infrared, Millimeter, and Terahertz Waves 2017 : Cancun, Quintana Roo, Mexico, August 27-September 1, 2017
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-6050-4
ISBN: 978-1-5090-6048-1
ISBN: 978-1-5090-6049-8
ISBN: 978-1-5090-6051-1
International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) <42, 2017, Cancun>
Fraunhofer ITWM ()

Sparse multistatic array designs that are based on the effective aperture concept enable real-time and cost-effective 3D CW terahertz imaging solutions. However, reduced system costs or challenging imaging scenarios eventually require a violation of the Nyquist sampling criterion, which leads to the appearance of grating lobes in the terahertz image. We propose a method to suppress grating lobes by exploiting the phase coherence of the signal samples along the array axis.