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FDTD analysis of higher‐order‐mode coupling effects in the crossed junctions of a planar slot array

Higher‐order‐mode coupling effects between radiating slots and coupling slots in centered‐inclined and longitudinal‐transverse types of crossed rectangular waveguide junctions are effectively analyzed in this paper by using a modified locally conformal finite‐difference time‐domain (MLC‐FDTD) algorithm. The errors arising from this higher‐order‐mode coupling are given in terms of the equivalent network S parameter. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 36: 422–425, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10781