caa a22 4500 445305398 CHVBK 20180317142611.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10762-011-9826-1 doi (NATIONALLICENCE)springer-10.1007/s10762-011-9826-1 Measurement of Complex Permittivity of Lossy Materials in Free Space Using Matched THz Power Meter [Elektronische Daten] [Boris Kapilevich, Yosef Pinhasi, Boris Litvak] The complex permittivity of lossy materials is measured at 330GHz by matched THz power meter. Such a power meter operates near the Brewster's angle of its absorbing film resulting in an own reflection coefficient close to zero. It permits to reduce an uncertainty associated with parasitic reflections created by conventional power meters. The measured power transmission coefficient of the dielectric slab as a function of the incident angle is used for estimating the dielectric constant. Its evaluation is based on the root-finding procedure applied to the proper formulated system of two non-linear equations. Convergence and sensitivity of this system in the space of $$ \left\{ {{{\varepsilon '}_{\text{r}}},{{\varepsilon ''}_{\text{r}}}} \right\} $$ are investigated in order to formulate recommendations how guess values providing the unique solution must be chosen. The results are useful for estimating sheilding effects caused by dielectric losses in the sub-mm range with application to detecting hidden objects as well as other homeland security purposes. Springer Science+Business Media, LLC, 2011 Sub-millimeter wave propagation in absorbing media nationallicence Complex permittivity measurements nationallicence Dielectric losses nationallicence Kapilevich Boris Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut Pinhasi Yosef Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut Litvak Boris Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/12(2011-12-01), 1446-1456 1866-6892 32:12<1446 2011 32 10762 https://doi.org/10.1007/s10762-011-9826-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10762-011-9826-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kapilevich Boris Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut NATIONALLICENCE 700 1- Pinhasi Yosef Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut NATIONALLICENCE 700 1- Litvak Boris Ariel University Center of Samaria, P.O. Box 3, 40700, Ariel, Israel aut NATIONALLICENCE 773 0- Journal of Infrared, Millimeter, and Terahertz Waves Springer US; http://www.springer-ny.com 32/12(2011-12-01), 1446-1456 1866-6892 32:12<1446 2011 32 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer