Abstract
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.
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References
Polívka, J.: Active Microwave Radiometry and Applications, Internat. Journal of IR and MM Waves, Vol. 16, No. 9, 1995, p. 1593–1672
Polívka, J.: Mapping Field Density in Microwave Radiators by Noise, Internat Journal of IR and MM Waves, Vol. 17, No. 10, 1996, p. 1779–1788
Polívka, J.: Mapping Fields in Microwave Radiators by Microwave Radiometry, COMITE 97 Czech National/International Microwave Conference, 17 October 1997, Pardubice, Czech Republic
Baltes, H.P.: Coherence and the Radiation Laws, Appl.Phys. 12, 1977, p. 221–244
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Polívka, J. Microwave noise radiators. Int J Infrared Milli Waves 18, 2403–2410 (1997). https://doi.org/10.1007/BF02678400
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DOI: https://doi.org/10.1007/BF02678400