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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 24, Iss. 24 — Dec. 15, 1985
  • pp: 4489–4492

Submillimeter and millimeter wave characterization of absorbing materials

Hamid Hemmati, John C. Mather, and William L. Eichhorn  »View Author Affiliations


Applied Optics, Vol. 24, Issue 24, pp. 4489-4492 (1985)
http://dx.doi.org/10.1364/AO.24.004489


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Abstract

Several microwave absorbers have been characterized in terms of transmittance and reflectance at frequencies between 35 GHz and 3 THz. The materials studied were a series of iron-loaded cast epoxy absorbers known as Eccosorb. Measurements show that reflectance and absorption coefficient increase with the iron density. A dramatic decrease, by as much as a factor of 2, in absorption coefficient was observed when the samples were cooled from ambient to cryogenic temperatures. A blackbody calibrator to be operated at liquid helium temperature was constructed using the measured optical constants for these absorbers. The measured absorption coefficient for cold Eccosorb CR-110 is within 20% of that reported recently by Peterson and Richards.

© 1985 Optical Society of America

History
Original Manuscript: May 10, 1985
Published: December 15, 1985

Citation
Hamid Hemmati, John C. Mather, and William L. Eichhorn, "Submillimeter and millimeter wave characterization of absorbing materials," Appl. Opt. 24, 4489-4492 (1985)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-24-24-4489

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