Open-Ended Coaxial Dielectric Probe Effective Penetration Depth Determination
Identifieur interne : 000D28 ( Main/Exploration ); précédent : 000D27; suivant : 000D29Open-Ended Coaxial Dielectric Probe Effective Penetration Depth Determination
Auteurs : Paul M. Meaney ; Andrew P. Gregory ; Jan Sepp L ; Tapani LahtinenSource :
- IEEE transactions on microwave theory and techniques [ 0018-9480 ] ; 2016.
Abstract
We have performed a series of experiments which demonstrate the effect of open-ended coaxial diameter on the depth of penetration. We used a two layer configuration of a liquid and movable cylindrical piece of either Teflon or acrylic. The technique accurately demonstrates the depth in a sample for which a given probe diameter provides a reasonable measure of the bulk dielectric properties for a heterogeneous volume. In addition we have developed a technique for determining the effective depth for a given probe diameter size. Using a set of simulations mimicking four 50 Ω coaxial cable diameters, we demonstrate that the penetration depth in both water and saline has a clear dependence on probe diameter but is remarkably uniform over frequency and with respect to the intervening liquid permittivity. Two different 50 Ω commercial probes were similarly tested and confirm these observations. This result has significant implications to a range of dielectric measurements, most notably in the area of tissue property studies.
Url:
DOI: 10.1109/TMTT.2016.2519027
PubMed: 27346890
PubMed Central: 4917297
Affiliations:
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