MODELING OF RING-SLOT-ELEMENT FLOQUET CELL FOR REFLECTARRAY ANTENNAS
https://doi.org/10.32603/1993-8985-2018-21-5-25-32
Abstract
The ring-slot-element cell for reflectarray antennas is investigated. The mathematical model of the unit cell is based on the integral equation that is solved by the moment method with the use of the spectral domain Green’s function. Coaxial-line higher modes expressed in terms of cylindrical functions are used as the basis for magnet-current representation. It is shown that “stricken” frequencies at which resonance modes occur are an inherent part of slot elements. These frequencies are determined by the Green’s function poles. Moreover, the lowest resonance mode may occur in the operating band under certain conditions. Reflection-phase dependencies on the ring-slot size are provided, demonstrating that at “stricken” frequencies the unit cell does not operate properly. Field plots are presented, which show that the resonance-mode field distribution on the ring slot is significantly different from the normal-mode field distribution. It is found that the “stricken” frequencies might be shifted beyond the operating band by means of thorough selection of unit-cell geometric parameters.
About the Authors
Svyatoslav V. Ballandovich
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
Svyatoslav V. Ballandovich – Ph.D. in Engineering (2015), Assistant of the Department of Theoretical Basics of Radio Engineering of Saint Petersburg Electrotechnical University "LETI". The author of more than 20 scientific publications. Area of expertise: technical electrodynamics; antenna-feeder devices.
5, Professor Popov Str., 197376, St. Petersburg, Russia
Grigory A. Kostikov
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
Grigory A. Kostikov – Ph.D. in Engineering (2007), Associate Professor of the Department of Theoretical Basics of Radio Engineering of Saint Petersburg Electrotechnical University "LETI". The author of more than 50 scientific publications. Area of expertise: technical electrodynamics; antenna-feeder devices.
5, Professor Popov Str., 197376, St. Petersburg, Russia
Yury G. Antonov
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
Yury G. Antonov – Ph.D. in Engineering (2007), Associate Professor of the Department of Theoretical Basics of Radio Engineering of Saint Petersburg Electrotechnical University "LETI". The author of more than 30 publications. Area of expertise: electrodynamics; antennas.
5, Professor Popov Str., 197376, St. Petersburg, Russia
Liubov M. Liubina
Saint Petersburg Electrotechnical University "LETI"
Russian Federation
Russian Federation
Liubov M. Liubina – Master’s Degree in Radio Engineering (2017), Assistant of the Department of Theoretical Basics of Radio Engineering of Saint Petersburg Electrotechnical University "LETI". The author of more than 20 publications. Area of expertise: electrodynamics; antennas.
5, Professor Popov Str., 197376, St. Petersburg, Russia
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Review
For citations:
Ballandovich S.V., Kostikov G.A., Antonov Yu.G., Liubina L.M. MODELING OF RING-SLOT-ELEMENT FLOQUET CELL FOR REFLECTARRAY ANTENNAS. Journal of the Russian Universities. Radioelectronics. 2018;(5):25-32. (In Russ.) https://doi.org/10.32603/1993-8985-2018-21-5-25-32
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