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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Druckformat: 0040-2508
ISSN Online: 1943-6009

Volumes:
Volumen 78, 2019 Volumen 77, 2018 Volumen 76, 2017 Volumen 75, 2016 Volumen 74, 2015 Volumen 73, 2014 Volumen 72, 2013 Volumen 71, 2012 Volumen 70, 2011 Volumen 69, 2010 Volumen 68, 2009 Volumen 67, 2008 Volumen 66, 2007 Volumen 65, 2006 Volumen 64, 2005 Volumen 63, 2005 Volumen 62, 2004 Volumen 61, 2004 Volumen 60, 2003 Volumen 59, 2003 Volumen 58, 2002 Volumen 57, 2002 Volumen 56, 2001 Volumen 55, 2001 Volumen 54, 2000 Volumen 53, 1999 Volumen 52, 1998 Volumen 51, 1997

Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v77.i19.40
pages 1719-1727

THERMAL ACTION OF MICROWAVE RADIATION ON A VERY THIN CONDUCTIVE FIBER

N. G. Kokodiy
V. Karazin National University of Kharkiv, 4, Svoboda Sq., Kharkiv, 61022, Ukraine; National University of Pharmacy, 53 Pushkinkaya St., Kharkiv, 61027, Ukraine
М. V. Kaydash
National University of Pharmacy, 53 Pushkinskaya St., Kharkiv 61027, Ukraine
S. V. Pogorelov
National University of Pharmacy, 53 Pushkinskaya St., Kharkiv 61027, Ukraine

ABSTRAKT

The paper presents experimental findings of a new physical effect arising as a result of a strong interaction of microwave radiation with very thin (d << λ) conductive fibers. The calculations show that the absorption efficiency factor of a fiber having a diameter of several micrometers, being exposed to radiation in a centimeter range, can reach the value of several hundreds. It was found that the effect can be enhanced by oblique incidence of the radiation beam. An experiment to measure the absorption of microwave radiation with a wavelength of 1 cm in a graphite fiber of 12 μm in diameter has been carried out. To determine the radiation absorption in a fiber its resistance changing under radiation heating was measured. To reduce the error of results, the average value of resistance for 1 minute with a frequency of 2 Hz was measured. A thermal image of the heated fiber was observed using a thermal imager. A mathematical model of the process of fiber heating with a radiation beam has been developed. It has been shown experimentally that a graphite fiber with 12 μm in diameter absorbs about 10% of the energy of the incident microwave beam having a wavelength of 1 cm. The heating temperature at the beam incidence point reaches 200 °C. The developed mathematical model describes well the radiation-fiber interaction process. Investigation results confirm the existence of a strong interaction between the microwave radiation and very thin conductive fibers. The effect under consideration can be applied in facilities in order to transfer the electromagnetic radiation energy for small targets. Another use of this effect is the creation of protective screens against the microwave radiation effect on humans or on different facilities.


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