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Analysis of large microstrip-fed tapered slot antenna arrays by combining electrodynamic and quasi-static field models

Rob Maaskant (Institutionen för signaler och system, Antenner) ; Marianna Ivashina (Institutionen för rymd- och geovetenskap, Avancerad mottagarutveckling) ; Oleg Iupikov (Institutionen för signaler och system) ; E. A. Redkina ; S Kasturi ; D. H. Schaubert
IEEE Transactions on Antennas and Propagation (0018-926X). Vol. 59 (2011), 6, p. 1798-1807.
[Artikel, refereegranskad vetenskaplig]

A reduced-order model for large arrays of microstrip-fed tapered slot antennas (TSAs) is presented. The currents on the antenna conductors are modeled by a relatively small number of physics-based macro-domain basis functions through a technique which is known as the characteristic basis function method (CBFM). The array is treated as a metal-only structure, while the wideband microstrip feeds are separately modeled using quasi-static circuit models. It is demonstrated that, even though the dielectric-supported feeds are non-shielded and therefore form an integral part of each radiating antenna element, the feeds can be modeled independently from the strongly coupled antenna elements. Validation of the combined antenna-feed model has been carried out through the measurements of several practically realized TSA arrays, among them a 8 × 7 × 2 dual-polarized array. The results demonstrate good agreement over a large scan range, as well as over a wide frequency band. The polarization-discrimination capabilities of the antenna, when operating in phased-array mode, have been analyzed in the context of radio-astronomical applications.

Nyckelord: Antenna arrays, characteristic basis function method (CBFM), hybrid modeling techniques, method of moments (MoM), radio astronomy, tapered slot antennas (TSAs)



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Denna post skapades 2012-01-17. Senast ändrad 2013-03-12.
CPL Pubid: 153337

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Antenner (2005-2014)
Institutionen för rymd- och geovetenskap, Avancerad mottagarutveckling
Institutionen för signaler och system

Ämnesområden

Informations- och kommunikationsteknik
Elektroteknik och elektronik

Chalmers infrastruktur