"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 7, 2018

contents of issue      DOI  10.30898/1684-1719.2018.7.4     full text in Russian (pdf)  

Focused antennas applicators for tasks of diagnostic radio thermometry


Yu. E. Sedelnikov 1, V. S. Kublanov 2, O. V. Potapova 1

1 Kazan National Research Technical University named after A.N.Tupolev - KAI, K. Marx 10, Kazan 420111, Russia

2 Ural Federal University, Mira street 19, Yekaterinburg 620002, Russia


 The paper is received on June 19, 2018


Abstract. In the article the analysis and assessment were done for using the focused antennas-applicators in diagnostic equipment of radio thermometry. The properties of focused antennas in dissipative medium were described. The most important properties for typical biological mediums are: the absence of expressed effective focusing in transverse direction, existence of optimal aperture size the (order of values is more than several wave-lengths in medium), which provides maximum gain, reducing of focused effect as far as decreasing the focused distance. Approximate model was used for quantitative analysis. Correctness of approximate model at distances more than half boundary of near-field region was showed by electrodynamics simulating. We carried out model-based analysis of directional radiation of focused antennas which were placed on the plane or spherical boundary of air-medium. Also we performed the analysis of focusing effect for electrical type radiators (dipoles) and magnetic type radiators (slot radiators). The work shows that using magnetic type radiators is more effective than electrical type radiators for distance from aperture less 1,5…2 wave-lengths in medium. It was showed that focused antennas allow to obtain the greater values of a gain at distances from antenna more than wave-lengths in medium. We considered the focused antennas which placed on the spherical boundary of air-medium.

Key words: focused antennas, radio thermometry, electric type radiators, magnetic type radiators, efficiency of focusing.


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For citation:
Yu.E.Sedelnikov, V.S. Kublanov, O.V. Potapova. Focused antennas applicators for tasks of diagnostic radio thermometry. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 7. Available at http://jre.cplire.ru/jre/jul18/4/text.pdf

DOI  10.30898/1684-1719.2018.7.4