Accuracy enhancement of a split-ring resonator liquid sensor using dielectric resonator coupling
Publication date
2014-01
Document type
Conference paper
Author
Organisational unit
Scopus ID
Conference
20th International Conference on Microwaves, Radar and Wireless Communications (MIKON) 2014
ISBN
Part of the university bibliography
Nein
Language
English
Keyword
Biomedical materials
Materials testing
Microwave sensors
Nondestructive testing
Abstract
Two planar resonant sensors for biomedical applications are compared with respect to their functionality when measuring high-loss materials. One sensor is a split-ring resonator. Liquid samples are placed at the gap where the conductor is shaped into tips. When sensing high-loss materials such as water this sensor type has a very low quality factor and therefore the evaluation of the resonance becomes inaccurate. To improve the quality factor, the second sensor uses a dielectric resonator as coupling element between the feed line and the split-ring resonator. Both sensors are tested on water and saline solutions. It is shown that the dielectric resonator drastically improves the quality factor of the sensing design and therefore enhances the accuracy of the sensor with respect to material characterization.
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