Abstract.
The paper deals with the results of investigation of metamaterial exhibiting
radar absorbing properties at microwave frequencies owing to the resonant
phenomena in metallic inclusions. In particular, inclusions are investigated in
the form of conducting isolated nichrome wire rings with twisted edges. It is
demonstrated that such wire inclusions may be used to prepare materials exhibiting
radar absorbing properties at certain frequencies in the vicinity of the resonant
frequency of the inclusions. The practical applications of such metamaterial exhibiting
radar absorbing properties at frequency 300 MHz were shown. In particular, it
is performed significant reduction of standing wave coefficient of dipole
antenna inside a shielding cover (up to 2.0 at the frequency band 290-315 MHz).
The shielding covers with a sensor are widely used for the antenna-feeder systems
diagnosis. The results of the experiments showed that the influence of the
metamaterial on the shielding of antenna and the level of the transmitted
signal from the antenna to the sensor is negligible. A numerical simulation of
such metamaterial was performed by calculation using the FEKO software package
of electromagnetic simulation. It is shown that the uneven distribution of the
electric field is located at the resonant elements. Therefore, the position of
the resonant elements relative to the antenna has a significant influence on
the standing wave coefficient of antenna inside the shielding cover. The main
advantages of the investigated metamaterial are ease of fabrication, high
thermal stability and the resistance to the external influencing factors. The
results of the research have been reported at «5-th all-Russian Microwave
Conference».
Key words:
metamaterial, radar-absorbing material, ultra high frequencies,
resonant inclusions, standing wave coefficient.
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For citation:
V. N. Semenenko, K. M. Baskov, A. A.
Politiko, D. I. Akimov, N. N. Stepanov. Shielding
cover with radar
absorbing metamaterial inside. Zhurnal Radioelektroniki - Journal of
Radio Electronics. 2018. No. 1. Available at
http://jre.cplire.ru/jre/jan18/6/text.pdf.
DOI 10.30898/1684-1719-2018-1-6