By Wenhua Yu, Xiaoling Yang, Yongjun Liu, Department of Electrical and Computer Engineering Raj Mittra, Akira Muto
The finite-difference time-domain (FDTD) process has revolutionized antenna layout and electromagnetics engineering. here is a state of the art booklet that makes a speciality of the functionality optimization and engineering functions of FDTD simulation platforms. masking the most recent advancements during this quarter, this distinct source supply pros specialist suggestion at the FDTD process, systems, and community structures. furthermore the e-book deals assistance in distinguishing among the various various electromagnetics software program applications out there at the present time. pros additionally discover a whole bankruptcy devoted to huge multi-scale challenge fixing. This functional reference is supported with 250 illustrations, 128 equations, and eleven appendixes jam-packed with worthy information processing recommendations with regards to the FDTD strategy.
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Extra resources for Advanced FDTD Method: Parallelization, Acceleration, and Engineering Applications (Artech House Electromagnetic Analysis)
Lt Less than. le Less than or equal to. ne Not equal. nlt Not less than. nle Not less than or equal to. ord Ordered. unord Unordered. Conversion: cvtpi2ps - Converts two 32-bit integers to 32-bit floating-point values. Top two values remain unchanged. cvtps2pi - Converts two 32-bit floating-point values to 32-bit integers. cvtsi2ss Converts a 32-bit integer to 32-bit floating-point value. Top three values remain unchanged. cvtss2si Converts a 32-bit floating-point value to 32-bit integer. cvttps2pi - Converts two 32-bit floating-point values to 32-bit integers using truncation.
5(a). In this case we need not use the PEC ground thickness as a reference for the mesh generation scheme, provided we ignore the skin depth, and the conformal technique can handle this thin PEC structure. 5(b), and the simulation result will still be accurate. 5(c). We should point out that the PEC and finite-conductor conformal techniques utilize different strategies to model the structures. If an edge intersects with a conductor in the finite-conductor model, this edge will also be a finite-conductor.
Since the shape of the dipole is a long cylinder, the computational domain will have a similar shape if we use the same size of white space around the dipole. For an irregular domain (the size in one direction is much larger than the other two), the simulation is stable but may not be accurate, especially for the far-field results. The reason is that the nonphysical reflection from the absorbing boundary is involved in the electric and magnetic currents on the surface of Huygens’ box. The excitation of a dipole antenna can be a simple voltage located in the small feed gap that points from the top of the lower arm to the bottom of the upper arm.