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Increasing the bandwidth of coaxial aperture arrays in radar frequencies |
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| Authors: | S. Nosal P. Soudais J.-J. Greffet |
| Affiliation: | 1.Laboratory for Electromagnetic Waves and Microwave Electronics,Swiss Federal Institute of Technology,Zürich,Switzerland;2.Dassault Aviation,Saint-Cloud,France;3.Laboratoire Charles Fabry, Institut d Optique,Université Paris Sud, CNRS,Palaiseau,France |
| Abstract: | 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. |
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