caa a22 4500 477123732 CHVBK 20180405111643.0 cr unu---uuuuu 170330e19971201xx s 000 0 eng 10.1007/BF02678400 doi (NATIONALLICENCE)springer-10.1007/BF02678400 Polívka Jiří POL-CONSULT, Černého 426, 182 00, Praha 8, Czech Republic aut Microwave noise radiators [Elektronische Daten] [Jiří Polívka] For the purposes of Microwave Active Radiometry (1), three noise radiators were developed and tested. One is a conventional noise diode source in a rectangular R-100 waveguide with a 6-dB horn attached, other two noise radiators are made as half-wave dipoles with noise diodes installed. Excess noise ratio and polarization ratio was estimated for the three designs, and the 3-D radiation pattern determined for the dipole models. For evaluation, radiometers operating at 11.5 GHz and 12.5 GHz were used, but some response was also determined with a radiometer operating at 4 GHz. Plenum Publishing Corporation, 1997 International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/12(1997-12-01), 2403-2410 0195-9271 18:12<2403 1997 18 10762 https://doi.org/10.1007/BF02678400 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02678400 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Polívka Jiří POL-CONSULT, Černého 426, 182 00, Praha 8, Czech Republic aut NATIONALLICENCE 773 0- International Journal of Infrared and Millimeter Waves Kluwer Academic Publishers-Plenum Publishers 18/12(1997-12-01), 2403-2410 0195-9271 18:12<2403 1997 18 10762 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer