An Efficient Ray-tracing Method for Analysis and Design of Electromagnetic Shielded Room Systems

Wang, S.; Lim, Hyun-Su; Li, E. P.

doi:10.1163/156939305775570503

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…To expedite calculation, various space partition methods such as octree, quad tree and acceleration techniques can be used [16][17][18][19][20][21][22][23][24]. The information is statistically analyzed and various channel parameters are obtained.…”

Section: Calculation Of Light Intensitymentioning

confidence: 99%

A Photon Modeling Method for the Characterization of Indoor Optical Wireless Communication

Lee¹

2009

PIER

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Abstract-In this paper, an analysis method for optical wave propagation based on photon model is presented for the characterization of optical wireless communication environment. In contrast to radio waves, optical waves have very short wavelengths, so that material properties become important and often cause diffuse reflections. Channel models including diffuse reflections and absorption effects due to material surface textures make conventional electromagnetic wave analysis methods based on ray tracing consume enormous time. To overcome these problems, an analysis method using photon model is presented that approximates light intensity by density of photons. The photon model also ensures that simulation time is within a predictable limit and the accuracy is proportional to the number of total photons used in the simulation.

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Section: Calculation Of Light Intensitymentioning

confidence: 99%

A Photon Modeling Method for the Characterization of Indoor Optical Wireless Communication

Lee¹

2009

PIER

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“…(3), the electric and magnetic field at the point of r S of the antenna is replaced by the field at the point r P of the projection plane multiplied by divergence and phase factors [18][19][20][21]. If a radome encloses the antenna 'A' as shown in Fig.…”

Section: Formulationmentioning

confidence: 99%

Prediction of Radome Bore-Sight Errors Using a Projected Image of Source Distributions

Lee¹,

Park²

2009

PIER

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Abstract-In this paper, a calculation method for bore sight error voltage is presented for aperture antennas enclosed in radomes of arbitrary shapes.The method adopts a ray tracing technique frequently used in computer graphics field in constructing two dimensional computer graphics images to obtain a projected image of source distribution, thereby bore sight error voltages and far field radiation patterns are calculated fast and accurately. Besides, the method enables us to use various acceleration schemes used in computer graphics readily. Numerical calculations show that projected source images with a resolution higher than 0.1λ and multiple reflections taken into account produce reliable results. The validity of the method is verified by comparison with results of an analytic solution.

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“…To overcome those problems, more quantitative models that consider environment information about buildings, walls, windows and furniture are developed and widely adopted. Examples of the models are based on geometrical optics [1][2][3][4][5], uniform theory of diffraction (UTD) [6,7], hybrid moment method [8], and FDTD [9]. Of those, ray tracing techniques combined with UTD are most frequently used.…”

Section: Introductionmentioning

confidence: 99%

Accelerated Three Dimensional Ray Tracing Techniques Using Ray Frustums for Wireless Propagation Models

Kim¹,

Lee²

2009

PIER

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Abstract-In this paper, accelerated techniques for three dimensional ray tracing using the concept of ray frustums are presented for the fast characterization of wireless communications, where various radio propagation paths such as wall-transmitted wave and scattered wave from buildings and ground are generated. To accommodate such scatterers, objects are modeled by triangulated meshes, and potential ray paths are searched and stored in the form of ray frustums. The presented acceleration techniques using the frustums include sorting of triangulated surfaces, hashing functions and space partitioning. The validity of the method is verified by comparison with measurement data.

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An Efficient Ray-tracing Method for Analysis and Design of Electromagnetic Shielded Room Systems

Cited by 6 publications

References 4 publications

A Photon Modeling Method for the Characterization of Indoor Optical Wireless Communication

A Photon Modeling Method for the Characterization of Indoor Optical Wireless Communication

Prediction of Radome Bore-Sight Errors Using a Projected Image of Source Distributions

Accelerated Three Dimensional Ray Tracing Techniques Using Ray Frustums for Wireless Propagation Models

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