Accession Number:

ADA184538

Title:

Precise Measurement of Refractive Index and Absorption Coefficient of Near Millimeter Wave and Far Infrared Materials.

Descriptive Note:

Final rept. 1 Feb 84-31 Jan 87,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE FRANCIS BITTER NATIONAL MAGNET LAB

Personal Author(s):

Report Date:

1987-06-01

Pagination or Media Count:

9.0

Abstract:

A quasi-optical technique, namely, dispersive Fourier transform spectrometry, has now been improved to provide high-precision continuous data of complex refractive index, complex dielectric permittivity and loss tangent of materials and complex magnetic permeability of ferrite materials at millimeter and submillimeter wavelengths. The use of a polarizing two beam interferometric technique allowed a broad frequency coverage in particularly between 6mm and 0.5mm range. Non-polar polymers such as polyethylene and teflon exhibit extremely low-loss characteristics in the entire millimeter wavelength range.

Subject Categories:

  • Optics
  • Electricity and Magnetism
  • Miscellaneous Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE