[IEEE 2010 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW) - Kharkiv, Ukraine (2010.06.21-2010.06.26)] 2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES - The overcoming diffraction restrictions to achieve superhigh NEP and sub-diffraction resolution in terahertz frequency range receiving systems