Çok katmanlı ortamlarda 3-boyutlu baskılı yapılar için doğru ve verimli elektromanyetik benzetim algoritmasının geliştirilmesi

Development of a Rigorous and Efficient Electromagnetic SimulationAlgorithm for 3-D Printed Structures in Multilayer EnvironmentAuthor: Tayyar ÖNALABSTRACTAn efficient and rigorous electromagnetic simulation algorithm, based on the method ofmoments in conjunction with discrete complex image method (MoM-DCIM), isdeveloped for printed structures with multiple vertical conductors extending throughmultilayer media. As this approach, MoM-DCIM, has already proved to be very efficientto analyze printed structures with only horizontal conductors in multilayer environment,and with horizontal and vertical conductors in single-layer media, it is extended to moregeneral geometries with horizontal conductors and vertical conductors spanning morethan one layer. Moreover, the algorithm developed in this thesis is possibly the mostefficient approach to handle printed circuits with multiple vertical conductors, spanningone or more layers. Efficiency in this context refers to handling multiple verticalconductors with almost no filling cost of the MoM matrix, provided all verticalconductors have the same dependence in the vertical direction. Since the efficiency in thissense can be considered more like a by-product of employing MoM-DCIM in suchstructures, the proposed algorithm is presented emphasizing the steps that facilitate suchan efficient implementation of multiple vertical conductors. Some realistic circuits andplanar antennas, with and without multiple vertical strips are analyzed, and results arecompared to those presented in the literature and obtained from the commercial softwareem by SONNET to validate the algorithm. To assess the efficiency of the proposedalgorithm with additional vertical conductors, computational cost in terms of CPU time isprovided as a function of additional number of vertical conductors. It is observed thatadditional vertical conductors have almost negligible computational cost over that ofalready calculated MoM matrix entries for a single vertical conductor.Keywords: Method of Moments, 3-D Printed Structures, Vertical Conductors, Closed-Form Green?s Functions, DCIM