"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 10, 2018

contents of issue      DOI  10.30898/1684-1719.2018.10.3     full text in Russian (pdf)  

Method of increase in noise immunity of a radiotermography of biological objects by subtraction of currents in receiving contact antennas, taking into account interaction of these currents

Yu. N. Barabanenkov, K. M. Bograchev

Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya 11-7, Moscow 125009, Russia

 

The paper is received on September 30, 2018

 

Abstract. A method is suggested for improving the immunity for radiothermography of biological objects. The method uses the subtraction of currents in receiving antennas. These currents are excited by thermal radiation of  biological object and probably by the same frequency range radiation from outside of the object.  The receiving antennas are placed near the object surface. Under incidence of  the electromagnetic radiation in antennas are excited electric currents. These excited currents are self consistent because of antennas wave coupling, and satisfy a set of equations which in the case of antennas in the form of thin wire vibrator-dipoles tune   to half wavelength becomes a set of algebraic equations. It is shown that wave coupling between receiving vibrator-dipoles at near distances, small in comparison with their length, has resonant property and therefore the difference of currents excited in such vibrator-dipoles by incident thermal radiation from  biological object increases in the ratio of vibrator-dipole length to distant between them.  The similar formula is applicable also in the case when currents in half wavelength vibrator-dipoles are excited by electromagnetic radiation from outside the biological object, propagating in free space. In result one gets that relation between the difference of currents excited in receiving vibrator-dipoles by biological object thermal radiation and the difference of currents excited by electromagnetic radiation from outside the object is equal to ratio of wavelength in free space to wavelength in the object medium. This ratio in the case of human head brain and GGz radiation frequency range is about 6.

Key words:    radiothermography, biological objects, immunity.

References

1.     Godik E.E., Gulyev Yu.V.  Functional imaging of the human body  IEEE Eng. Med. Biol. 1991. Vol. 10. ¹ 4. P. 21.

2.      Anzimirov V.L., Arkhipova N.A., Pasechnik V.I., Yanovich V.I Investigationtic  of thermal excitation in human head brain core at functional tests by method of dynamic multichannel radiothermovision Biomed. Radioelektron. 2000, ¹ 8,  P. 22.

3.     Hand J.W., Van Leeuwen G.M.L., Miszushina S., Van de Kamer J.B., Maruyama K., Siguira T., Azzopardi D.V., A.D. Monitoring of deep brain temperature in infants using multi-frequency microwave radiometry and thermal modeling.  Adwards Phys. Med. Biol., 2001, V. 46, ¹ 7, pp.1885-1900.

4.      Rytov S.M. Theory of electric fluctuations and thermal radiation.  Moscow, Akad. Nauk SSSR, 1953

5.      Reznik A.N. Quasistatic field of thermal radiation in theory of contact radiothermomatry. Izv. Vyssh. Uchebn. Zaved., Radiofiz. 1991, Vol.34,  pp.512.

6.      Gulyaev Yu.V., Barabanenkov Yu.N., Barabanenkov M.Yu., Nikitov S.A. Optical theorem for electromagnetic field scattering by dielectric structures and energy emission from the evanescent wave.  Phys. Rev.E,  2005,V. 72, pp.026602-1-026602-12.

7.      Barabanenkov Yu.N., Bograchev K.M., Yanovich A.V. The near–field thermal microwave radiation response of a biological object to local change of the lateral temperature distribution Journal of Communication Technology and Electronics.  2010,  Vol.55,  No. 10,  pp.1132-1142.

8.      Yu.N. Barabanenkov,  Barabanenov M.Yu., Cherepenin V.A.   Near-field coherent effects at thermal microwave radiation receiving on coupled linear wire antennas.  Journal of Radio Electronics. 2011,  No. 12,  Available at http://jre.cplire.ru/jre/dec11/3/text.pdf

9.      Born M., Wolf E. Principles of Optics. New York, Pergamon Press, 1964.

10.   Yu.N. Barabanenkov, M.Yu. Barabanenkov, K.M. Bograchev. Method for 3D localisation of temperature fluctuation area in a biological object which using interference-extreme properties of contact receiving antenna transfer function in near-field radiothermograph. Proceedings of VI All-Russian scientific and technological conference “Radiolocation and radio communication” Nov. 19-22 2012,  Moscow, Kotelnikov Institute of Radioengineering and Electronics (IRE) of Russian Academy of Sciences, Proceedings, Vol.2, pp. 213-217. In Russian)

11.    Barabanenkov Yu.N., Barabanenkov M.Yu.,  Cherepenin V.A. Analytic model for near-field interference 3D radiothermography of biological tissue local temperature variation at radiation receiving on coupled liner wire antennas Progress In Electromagnetic Research Symposium. Abstract. Moscow, Russua,  August 19-23, 2012, P. 819.

12. Yu.N. Barabanenkov, M.Yu. Barabanenkov. Quasi-separable T-scattering operator approach to local field direct calculations in multiple scattering problems.  Journal of Radio Electronics. 2013, No. 4, Available at   http://jre.cplire.ru/jre/apr13/5/text.pdf

13. Yu.N. Barabanenkov, M.Yu. Barabanenkov. Quasi separable T-operator of dispersion  for solution the problems of electromagnetic radiation multiple scattering in  microstructured composite materials. Proceedings of VI All-russian scientific and technological conference “Radiolocation and radio communication” Nov. 19-22 2012,  Moscow, Kotelnikov Institute of Radioengineering and Electronics (IRE) of Russian Academy of Sciences, Vol.2, pp. 208-212. (In Russian)

14.  Barabanenkov Yu.N., Barabanenkov M.Yu.,  Lisenkov I. Dyson equation technique for homogenized electromagnetic crystal with unit cell formed by not small coupled nonmagnetic scatterers  Progress In Electromagnetic Research Symposium. Abstract. Moscow. Russua. August 19-23, 2012, pp. 814.

15.   Barabanenkov M.Yu., Barabanenkov Yu.N., Nikitov S.A. Virtual singular scattering of electromagnetic waves in transformation media concept Proc. Advanced Electromagnetic Symposium (AES2012). Paris. France. 16-19 April 2012, Zouhdi Eds. S. and Begaud X., University Paris-Sud & Telecom ParisTech pp. 368-376.

16.  Barabanenkov Yu.N, Osokin S., Kalyabin D., Nikitov S. Radiation losses and dark mode for the spin-wave propagation through a discrete magnetic microwaveguide.  Physical Review B. 2016, V.94, pp. 184409-1-184409-11.

17.  Yu.N. Barabanenkov,  K.M. Bograchev.  Reducing the incorrect problem of biological object's multichannel radiothermography for contact antennas  width wave interaction effects to analogous (like parallel similar) problem for independent antennas. Kotelnikov Institute of Radioengineering and Electronics (IRE) of Russian Academy of Sciences,Proceedings of Russian Microwave Conference, Moscow, Nov 23-25,  2016 (in Russian).

18.  Leontovich M.A, Levin M.L. To theory of oscillation excitation in vibrator antennas  Journ. Thechn. Phys. 14, 481, 1944.

 

For citation:

Yu. N. Barabanenkov, K. M. Bograchev. Method of increase in noise immunity of a radiotermography of biological objects by subtraction of currents in receiving contact antennas, taking into account interaction of these currents. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 10. Available at http://jre.cplire.ru/jre/oct18/3/text.pdf

DOI  10.30898/1684-1719.2018.10.3