Referenced Items are not available for this document.
A new vacuum melting extraction and casting (v.m.e.c.) process for polyolefins has resulted in exceptionally low dielectric losses in the range 10¿3000 GHz. At 12.5 GHz, losses in polypropylene have been found to be usually below 30 ¿ rad and in a few cases as low as 5 ¿ rad. Measuring techniques have been refined to cope with these low values. Loss angles at 13 and 28 GHz can be measured in waveguide bridges to a precision of ± 2 ¿ rad. Submillimetre spectra can be obtained by Fourier-transform spectroscopy with a reproducibility of better than 0.2% in the range 2¿200 cm¿1 (60¿6000 GHz).
Published in:
Electrical Engineers, Proceedings of the Institution of
(Volume:121
,
Issue:
11
)
Date of Publication: November 1974
- Page(s):
- 1447 - 1450
- ISSN :
- 0020-3270
- Digital Object Identifier :
- 10.1049/piee.1974.0304
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 26 January 2010
- Issue Date :
- November 1974
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