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Effects of metal irises on the guided-mode properties in asymmetrical slab waveguides |
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| Authors: | Alexander B. Manenkov Ioannis G. Tigelis Angelos J. Amditis |
| Affiliation: | a Institute for Physical Problems, Russian Academy of Sciences, Ulitsa Kosygina 2, Moscow 119334, Russia b University of Athens, Department of Physics, Applied Physics Division, Electronics Laboratory, Building V, Panepistimiopolis, Zografou, 157 84 Athens, Greece c National Technical University of Athens, Institute of Communication and Computer Systems, 9 Iroon Polytechniou Street, Zografou, 157 73 Athens, Greece |
| Abstract: | The diffraction phenomenon caused by metal transverse irises placed into an asymmetrical slab waveguide is examined by using the integral equation method. We concentrate on the possibility of controlling the radiation characteristics of the structure by changing the irises positions and the slab waveguide asymmetry. The aperture electric-field distribution is expressed in terms of a finite series of Chebyshev polynomials. The dominant TE guided-mode reflection and transmission coefficients, the near-field distribution and the far-field radiation pattern are calculated, while numerical results are presented for several cases of asymmetrical slab waveguides and different irises’ positions. |
| Keywords: | Asymmetrical slab waveguide Metal iris Far-field rotation Integral equation method Diffraction and scattering |
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