Title:
Miniature open-ended coaxial probes for dielectric spectroscopy applications
Author(s):
B L McLaughlin and P A Robertson
Source:
JOURNAL OF PHYSICS D: APPLIED PHYSICS
Vol./Issue/Date:
40 (2007)
Year:
2007
Page(s):
45–53
Keywords:
Abstract:
In this paper we describe theoretical modelling and experimental
measurements of miniature coaxial probes with flat and conical end profiles,
suitable for dielectric spectroscopy measurements on biological tissue
samples. Various analytical solutions are compared with the results of
simulations using CST Microwave for the sub-millimetre diameter probes
operating over a range 500 MHz–40 GHz. Very good agreement was found
between the theoretical and experimental data and it has been shown that
analytical models for the infinite flanged coaxial probe case are applicable to
small diameter flangeless probes, provided the outer conductor diameter is
about twice that of the dielectric bead in the coaxial transmission line. Data
are presented for a range of sample media including reference liquids and
liver tissue.
Document:
Reference Id:
288
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