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Hybrid FDTD/AUTOCAD® method for the analysis of BOR horns and reflectors
Author(s) -
Yang Zijiang,
Chen Yinchao,
Yu Wenhua,
Mittra Raj
Publication year - 2003
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.10881
Subject(s) - finite difference time domain method , solver , microwave , finite difference method , reflector (photography) , generator (circuit theory) , computer science , engineering , computational science , electronic engineering , optics , physics , mathematics , mathematical analysis , telecommunications , light source , power (physics) , quantum mechanics , programming language
Horns and reflector antennas, which are bodies of revolution (BORs), find widespread use in the areas of communication and radar systems. In this work, we present a highly efficient, BOR finite‐difference time‐domain (BOR/FDTD) technique for the analysis of these antennas. This approach allows us to employ a 2D finite‐difference lattice that projects a 3D Yee cell in the cylindrical coordinates (ρ, ϕ, z ) onto the (ρ, z ) plane, and substantially reduces the computational burden in the process. To analyze arbitrary BOR geometries, we develop a mesh generator that uses the commercial design tool AutoCAD® to systematically generate the geometrical and material input files for the BOR/FDTD solver. We also apply a near‐to‐far‐field transformation, based on a line integral along a contour of equivalent electric and magnetic currents, to evaluate the radiation patterns of these antennas in a highly efficient manner. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 236–243, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10881