DocumentCode
1428751
Title
Low-loss dielectrics for 10¿3000 GHz
Author
Ayers, S. ; Davies, G.J. ; Haigh, J. ; Marr, D. ; Parker, A.E.
Author_Institution
General Post Office, Research Department, London, UK
Volume
121
Issue
11
fYear
1974
fDate
11/1/1974 12:00:00 AM
Firstpage
1447
Lastpage
1450
Abstract
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).
Keywords
dielectric losses; loss-angle measurement; microwave measurement; organic insulating materials; polymers; 10-3000 GHz frequency range; Fourier transform spectroscopy; dielectric loss; insulating materials; loss angles; loss measurement; low loss dielectrics; microwave measurement; organic compounds; polyolefins; polypropylene; submillimetre spectra; vacuum melting extraction and casting; waveguide bridges;
fLanguage
English
Journal_Title
Electrical Engineers, Proceedings of the Institution of
Publisher
iet
ISSN
0020-3270
Type
jour
DOI
10.1049/piee.1974.0304
Filename
5250819
Link To Document