Title :
Reflectivity of commercial absorbers at 100-200 GHz
Author :
Lehto, A. ; Tuovinen, J. ; Raisanen, Antti
Author_Institution :
Radio Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
Different types (pyramidal, convoluted, wedge, flat) of absorber panels made by three manufacturers have been measured at 107 and 183 GHz. These measurements revealed a rapid degradation of the quality of absorbers from 107 to 183 GHz: reflectivity increased nearly 10 dB. The best absorbers have reflectivities below -40 dB at 107 GHz and about -35 dB at 183 GHz. Measurements for flat absorbers agree well with the equations for a dielectric interface.<>
Keywords :
anechoic chambers; electromagnetic wave absorption; electromagnetic wave reflection; 100 to 200 GHz; EHF; anechoic chambers; convoluted absorber; dielectric interface equations; flat absorbers; pyramidal absorber reflectivity; wedge absorber; Antenna measurements; Frequency; Gain measurement; Horn antennas; Manufacturing; Paints; Polarization; Power measurement; Reflectivity; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1991. AP-S. Digest
Conference_Location :
London, Ontario, Canada
Print_ISBN :
0-7803-0144-7
DOI :
10.1109/APS.1991.175063
