Radiation Control on a Step Discontinuity of a Grounded Chiral Slab
TECHNICAL UNIV OF LISBON (PORTUGAL)
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In this paper, we analyse the radiation on a step discontinuity of a grounded chiral slab, and we show that it can be enhanced due to the effect of chirality. In addition to the surface modes, the continuous spectrum of radiation modes is also taken into account. In fact, it is the coupling between these two types of modes that is responsible for the radiation occurring on the step. We show that chirality may increase such coupling and, therefore, improve radiation. The complete spectral representation includes two subsets of continuous hybrid modes Incident Transverse Electric ITE and Incident Transverse Magnetic ITM radiation modes. The scattering matrix of the step is determined by minimizing the boundary residual error in the sense of the least squares. The influence of chirality on the characterization of the step is demonstrated and we show that some control on the radiation pattern is achieved, mainly in the angle and width of the radiation beam.
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- Radiofrequency Wave Propagation