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Home Biotechnologies EHF Dielectrometer

EHF Dielectrometer


The developed hardware complex consists of the reflectometer based on the four-probe measuring (slotted) line and the modified measuring cell. The reflectometer works at the frequency 39.5 GHz and measures the complex reflection coefficient automatically in the band module value 0.05-0.8 (accuracy no worse than ±1,5%) and phase 0- 360° (accuracy no worse than ±1,5%). For the loads with the reflection coefficient close to the cell with the sample the accuracy is ±0.4% and ±0.15° for the module and phase correspondently. The preliminary calculations showed that the measurement accuracy permits one to obtain the permittivity with the statistical confidence 2-3%.

The obtainable accuracy characteristics of the device confirm the replacement adequacy of the measuring line with the movable probe that was used in the devise previous version by the multiprobe analog. The measurement time of a microwave load is about 3 seconds. The power in the waveguide microwave transmission line is no more than 10 mW. It eliminates the sample heating in the course of measurement. The last is very impotent for the investigation of the biological objects.

Innovative Aspect and Main Advantages

It permits one to take measurements of the permittivity complex value for the strongly absorbing substances with the statistical accuracy about 2-4 %.

Areas of Application

Medical-biological investigations.

EHF Dielectrometer
Fig. 1 EHF Dielectrometer

Stage of Development

Tested, available for demonstration – field tested.

Contact Details

Usikov Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine
Contact person: Junior Researcher Pavel S. Krasov
Address: 12, Acad. Proskury str., 61085, Kharkiv, Ukraine
Tel.: (+38 057) 720 3506 (w)
Fax: (+38 057) 315 2105
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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