Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

A New Radio-Frequency Acoustic Method for Remote Study of Liquids

Version 1 : Received: 24 March 2020 / Approved: 26 March 2020 / Online: 26 March 2020 (01:40:07 CET)
Version 2 : Received: 13 July 2020 / Approved: 13 July 2020 / Online: 13 July 2020 (03:05:48 CEST)

A peer-reviewed article of this Preprint also exists.

Kramarenko, A.V., Kramarenko, A.V. & Savenko, O. A new radio-frequency acoustic method for remote study of liquids. Sci Rep 11, 6696 (2021). Kramarenko, A.V., Kramarenko, A.V. & Savenko, O. A new radio-frequency acoustic method for remote study of liquids. Sci Rep 11, 6696 (2021).


In the present work a new method of study of liquids has been proposed. It is based on phenomenon of radio frequency anisotropy of electrolyte solution discovered by us. It arises because of mechanical or acoustic excitation of the solution. We were observing the phenomenon during the development process of RF polarimetric contactless cardiograhpy. The electric field vector of transmitted 433.82 MHz signal becomes rotated after its transition through the pericardial region. That rotation depends on change of blood acceleration when passing through the chambers of the heart and large vessels. It has also been revealed that rotation occurs after RF wave passage through the physiological saline (0.9% NaCl) subjected to any mechanical excitation inside it like a jet appearing or soundwave passing. No significant difference was detected experimentally between NaCl and KCl solutions behaviour. It means that the mechanism of hydrodynamic separation of ions is apparently not suitable to explain the phenomenon. The response we have registered most likely resembles the magnetization process of spin glasses. From the nature of the response observed we have concluded that a fundamentally new physical effect is discovered. It may provide wide opportunities for remote measurement of the electrolyte solutions parameters using polarized radio-frequency signals.


contactless cardiography; polarization vector; polarimetry; aqueous electrolyte solution; relaxation time; spin configuration


Physical Sciences, Applied Physics

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