preprints.org > physical sciences > applied physics > doi: 10.20944/preprints202003.0377.v2

Preprint Communication Version 2 Preserved in Portico This version is not peer-reviewed

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)

In the present work, a novel conductive liquids method of study has been proposed. It is based on the phenomenon of radiofrequency anisotropy of electrolyte solution discovered by us. It arises in response to mechanical or acoustic excitation of the solution. We have observed the phenomenon during the development of an RF polarimetric contactless cardiograph. The electric field vector of the transmitted 433.82 MHz signal rotated after its transition through the pericardial region. That rotation depends on the 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 behavior. It means that the mechanism of hydrodynamic separation of ions is apparently not suitable to explain the phenomenon. The response we have registered resembles the magnetization process of spin glasses. From the nature of the observed response, we have concluded that a fundamentally new physical effect is discovered. It may provide wide opportunities for remote measurement of the electrolyte solution parameters with polarized radio-frequency signals.

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

PHYSICAL SCIENCES, Applied Physics