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Artificial dielectric with surface synthesized for reflection of electromagnetic waves of microwave range

Keywords:

A.S. Avdyushin – JSC "IRCOS" (Voronezh, Russia)
A.V. Ashikhmin – Dr.Sc. (Eng.), Professor, Director, JSC "IRCOS" (Voronezh, Russia), chief engineer, JSC "IRCOS" (Moscow, Russia)
I.A. Zelenin – Associate Professor, Voronezh Technical State University
Yu.G. Pasternak – Dr.Sc. (Eng.), Professor, Voronezh Technical State University
S.M. Fedorov – Ph.D. (Eng.), Voronezh Technical State University


The authors studied two approaches to creating reflective phased arrays: one based on reflective waveguide phase shifters and another based on manageable artificial dielectric. The study found that in phased array antenna with reflective phase shifters based on broadband transition from short-to-wire metallic waveguide to transmission line, instant working frequency band is limited due to the uneven frequency dependencies phases of reflected waves. To expand operating frequency band is proposed and studied principle of reflective phased arrays based on manageable artificial dielectric which reflective surface is synthesized by closing of required combination of electrically short wires using MEMS-switches. Argumentation for choice of such approach is given. It was found that in proposed artificial dielectric a value of reflected wave phase can be adjusted over a wide frequency range from 0 to 360 degrees, and frequency dependence of phase corresponding to the different sections of the reflection plane location, and also because of isotropy of proposed basic artificial dielectric managed by use of optic-actuated MEMS-switches, wave polarization can be arbitrary.
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