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The RCS of a clylindrical array antenna coated with a dielectric layer
KTH, Superseded Departments, Alfvén Laboratory.
2004 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 1558-2221, Vol. 52, no 7, p. 1851-1858Article in journal (Refereed) Published
Abstract [en]

The scattering properties of dielectric coated waveguide aperture antennas mounted on circular cylinders are investigated. Both the single element antenna and the array case are treated. The array antenna consists of 4 x 32 rectangular apertures placed in a rectangular grid on the surface of an infinitely long circular cylinder. The problem is formulated in terms of an integral equation for the aperture fields which is solved with the method of moments using rectangular waveguide modes as basis and test functions. An efficient uniform asymptotic technique is used to calculate the excitation vector and the backscattered far-field. The asymptotic solution is valid for large cylinders coated with thin dielectric layers away from the paraxial (i.e. near axial) region. A similar asymptotic solution is used to calculate the mutual coupling in the nonparaxial region. For the self coupling terms and for the mutual coupling in the paraxial region a planar approximation is used with a corresponding spectral domain technique. Numerical results are presented as a function of frequency, angle of incidence, cylinder radius, and electrical thickness of the coating.

Place, publisher, year, edition, pages
2004. Vol. 52, no 7, p. 1851-1858
Keywords [en]
arrays, conformal antennas, method of moments (MoM), radar cross sections, scattering
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-41835DOI: 10.1109/TAP.2004.831300ISI: 000222629700025Scopus ID: 2-s2.0-4043050979OAI: oai:DiVA.org:kth-41835DiVA, id: diva2:453715
Note
QC 20111103Available from: 2011-11-03 Created: 2011-10-03 Last updated: 2017-12-08Bibliographically approved

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