The radar cross section of spherical retroreflectors operating at terahertz frequencies is investigated. Several spherical retroreflectors with diameters ranging from 2 mm to 8 mm were fabricated and their radar cross section was measured at 100 GHz, 160 GHz, and 350 GHz. A frequency selective surface was applied to the retroreflectors to demonstrate proof of concept of narrow-band terahertz retroreflection. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/22/2014 Terms of Use:

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... http://spiedl.org/terms Proc. of SPIE Vol. 9102 91020R-2 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/22/2014 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 9102 91020R-3 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/22/2014 Terms of Use: http://spiedl.org/terms Proc. of SPIE Vol. 9102 91020R-9 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 05/22/2014 Terms of Use: http://spiedl.org/terms