Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2012 - zeszyt 7

An automated design of substrate integrated waveguide filters based on implicit space mapping optimization

nr katalogowy: 69623

Over the past years, substrate integrated waveguide filters have received particular attention due to the possibility of achieving higher quality factor and better selectivity than classical planar circuits. This technology is relatively new and it offers many advantages like an easy fabrication and integration, a relatively low cost of production and low radiation. The design of filters in SIW technology requires full wave electromagnetic simulations with dense mesh. If it uses a full wave solver for optimization, the design process is very time consuming. To reduce this cost a design methodology called space mapping [1], [7] can be applied. The goal of this method is to shorten the design cycle by using a fast but less accurate coarse model to gain the information about the optimal parameters setting of the expensive but accurate fine model. To obtain the optimal design for the fine model, the space mapping technique compares the results of both simulations. If the misalignment between the fine and coarse models is not significant, the algorithm automatically reduces the differences. Space mapping application is most often used for modeling and optimization of microwave circuits. In most cases it uses circuit models as surrogates and a full wave solver to provide the reference results for model alignment. This methodology has been successfully applied to design microwave circuit such as filters, antennas and couplers. Recently, space mapping was also applied to design SIW filters in in-line configuration [13]. To this end segmentation technique with equivalent circuit models of the SIW discontinuities was adopted for fast coarse model computations. The circuit models were derived using BI-RME method [12]. In this paper an alternative approach to space mapping design of substrate integrated waveguide (SIW) filters [9-11] is proposed. Instead of using equivalent circuit models of discontinuities the initial design is obtained [...]

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2012-7

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