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Increasing the bandwidth of coaxial aperture arrays in radar frequencies

Nosal, S. ; Soudais, P. ; Greffet, J.-J

In: Applied Physics A, 2011, vol. 103, no. 3, p. 645-648

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    Titre
    • Increasing the bandwidth of coaxial aperture arrays in radar frequencies
    Auteur
    • Nosal, S.. Laboratory for Electromagnetic Waves and Microwave Electronics, Swiss Federal Institute of Technology, Zürich, Switzerland
    • Soudais, P.. Dassault Aviation, Saint-Cloud, France
    • Greffet, J.-J. Laboratoire Charles Fabry, Institut d Optique, Université Paris Sud, CNRS, Palaiseau, France
    Type de document
    • Postprint
    Classification
    • Technologie, Sciences de l'ingénieur
    Identifiant OAI-PMH
    • oai:doc.rero.ch:318036
    Summary
    Arrays of coaxial cavities in a silver slab are an angle-independent frequency-selective structure in the optical wavelengths. We show that understanding major resonant effects can achieve a similar structure in the radar frequencies. We use a biperiodic boundary integral method to explain the resonances. We suggest a geometrical evolution of the coaxial cavities that presents an enhanced bandwidth under oblique incidence in TM polarization