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IEEE Transactions on Microwave Theory and Techniques
Volume 48 Number 9, September 2000

Table of Contents for this issue

Complete paper in PDF format

Noise Temperature of a Lossy Flat-Plate Reflector for the Elliptically Polarized Wave-Case

T. Y. Otoshi and C. Yeh

Page 1588.

Abstract:

This short paper presents the derivation of equations necessary to calculate noise temperature of a lossy flat-plate reflector. Reflector losses can be due to metallic surface resistivity and multilayer dielectric sheets, including thin layers of plating, paint, and primer on the reflector surface. The incident wave is elliptically polarized, which is general enough to include linear and circular polarizations as well. The derivations show that the noise temperature for the circularly polarized incident wave case is simply the average of those for perpendicular and parallel polarizations.

References

  1. S. Ramo and J. R. Whinnery, Fields and Waves in Modern Radio, New York: Wiley, 1953.
  2. J. A. Stratton, Electromagnetic Theory, New York: McGraw-Hill, 1941.
  3. T. Y. Otoshi, Y. Rhamat-Samii, R. Cirillo and J. Sosnowski, "Noise-temperature and gain loss due to paints and primers on DSN antenna reflector surfaces", The Telecommunications and Mission Operations Progress Rep. 42-140, [Online] Available: http://tmo.jpl.nasa.gov/tmo /progress_report/42-140/140F.pdf, Feb. 15, 2000.
  4. H.-P. Ip and Y. Rahmat-Samii, "Analysis and characterization of multi-layered reflector antennas: Rain/snow accumulation and deployable membrane", IEEE Trans. Antennas Propagat., vol. 46, pp.  1593-1605, Nov.  1998 .
  5. T. Y. Otoshi, "Maximum and minimum return losses from a passive two-port network terminated with a mismatched load", IEEE Trans. Microwave Theory Tech., vol. 42, pp.  787-792, May  1994.
  6. E. H. Thom and T. Y. Otoshi, "Surface resistivity measurements of candidate subreflector surfaces", The Telecommunications and Data Acquisition Progress Rep. 42-65, Jet Propulsion Lab., Pasadena, CA, Oct. 15, 1981.
  7. T. Y. Otoshi and M. M. Franco, "The electrical conductivities of steel and other candidate material for shrouds in a beam-waveguide antenna system", IEEE Trans. Instrum. Meas., vol. 45, pp.  73-83, Feb.  1996.
  8. T. Y. Otoshi and M. M. Franco, "Correction to `The electrical conductivities of steel and other candidate material for shrouds in a beam-waveguide antenna system'", IEEE Trans. Instrum. Meas., vol. 45, p.  839, Aug.  1996.