Ray Techniques in Electromagnetics GEORGES
نویسنده
چکیده
Absfracf-The principles of ray optics and, in more detail, some selected applications of ray techniques to electromagnetic8 are reviewed briefly. It is shown how a systematic use of matrix representation for the wavefront curvature and for its transformations simplify the handling of arbitrary pencils of rays and, consequently, the field computations. The same methods apply to complex rays which give a means of describing the effects of reflections and refractions on Gaussian beams. The relations of ray optics to other disciplines are also briefly discussed.
منابع مشابه
Efficient Multi-Objective Synthesis for Microwave Components Based on Evolutionary Computation and Machine Learning Techniques
Multi-objective synthesis for microwave components (e.g. integrated transformer, antenna) is in high demand. Since the embedded electromagnetic (EM) simulations make these tasks very computationally expensive when using traditional multiobjective synthesis methods, efficiency improvement is very important. However, this research is almost blank. In this paper, a new method, called Gaussian Proc...
متن کاملImprovement of Classroom Teaching of Electromagnetics by Means of an Electronic Book
This paper discusses techniques used to develop an electronic book about electromagnetics. The techniques are based on problem-based learning, which is the latest method used for teaching. This method, together with engineering tools, is well suited for teaching these subjects to students in Asia. The proposed techniques allows teaching to be not limited to paper study by allowing the use of mu...
متن کاملSimulation of Wireless Channels via Biorthogonal Interpolating Function-Based High Order S-MRTD Time Domain Techniques
Prior to recent advances in computational electromagnetics, a deterministic timedomain simulation of a wireless channel was deemed too expensive to implement. Conventionally, wireless channel designers use more practical measurement-based techniques, involving statistical models or channel transfer functions [1–3]. However, despite their convenience, such techniques can be inaccurate and lead t...
متن کاملComputational electromagnetics for design optimisation: the state of the art and conjectures for the future
The paper reviews the state of the art in modern field simulation techniques available to assist in the design and performance prediction of electromechanical and electromagnetic devices. Commercial software packages, usually exploiting finite element and/or related techniques, provide advanced and reliable tools for every-day use in the design office. At the same time Computational Electromagn...
متن کاملEfficient Wideband Electromagnetic Modeling for Indoor Wireless Channels: A High-Order Finite- Difference Approach
Statistical, measurement-based propagation models are widely employed for the analysis of indoor wireless channels. However, their inherent inability to fully account for the rich multi-path propagation effects results in their lack of robustness, that has been repeatedly pointed out [Cavilla et al., Proc. IEEE Comm. Society Conf. on Sensor and Ad-hoc, Comm. and Networks, Oct. 2004]. Full-wave ...
متن کامل