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The potential implementation of personal communication systems inside buildings requires a thorough understanding of signal propagation within buildings. As practical measurements are costly, difficult in accuracy, and time consuming that translate into costly service for the consumer, there is an increasing demand for efficient and accurate simulation-based indoor radio propagation prediction tools. Therefore, this study explores a new, efficient, and faster ray-tracing technique based on the Binary Angle Division algorithm for indoor radio signal prediction. The obtained simulated results are compared with other existing techniques to prove the superiority of the proposed algorithm in terms of both computational efficiency and accuracy. The results obtained from this study show satisfactory performance and good agreement with the simulated results. [ABSTRACT FROM AUTHOR]

Schelkunoff's method, also commonly refered to as Coupled Mode Method (CMM), is a numerical method which gives the propagation constants and the electromagnetic field in a general homogeneous medium bounded by perfect electric walls. In this paper, we test Schelkunoff's method for a waveguide filled with an isotropic chiral material (chirowaveguide) where the dimensions of the walls are electrically large compared with the wavelength. It is reasonable to foresee that, in this case, the results given by Schelkunoff's method must approach to the corresponding ones for the chiral unbounded medium. Effectively, we obtain the solutions for both circular polarized waves (right-handed and left-handed) in free propagation in a single calculation. These results are in opposition with those of other authors analyzing analogous cases. [ABSTRACT FROM AUTHOR]