Abstract:
:This work presents the measurement of the permittivities of water and methanol in the D-band. Water is a reference medium for dielectric measurement. The dielectric permittivity of water in the millimeter wave range is a fundamental parameter in many applications, and needs to be investigated systematically. The measurement is conducted using a quasi-optical spectroscopy, which is an improved free-space method more suitable for the millimeter wave range. The theoretical formulae are derived using the signal-flow chart method, which is developed specially for multi-layer operation. This model enables one measure liquid samples. A non-calibration method has been developed to retrieve the permittivity. Water and methanol are measured at several temperatures. The measured results agree with published results in a 4% discrepancy. This work will add new measured data to the permittivities of water and methanol over the whole D-band.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Liu X,Yu Jdoi
10.1038/s41598-019-55126-6subject
Has Abstractpub_date
2019-12-06 00:00:00pages
18562issue
1issn
2045-2322pii
10.1038/s41598-019-55126-6journal_volume
9pub_type
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