Space Mapping Design of Gap Waveguide Filters

Gap waveguide filters, designed using coupled resonator theory, typically require a significant amount of post-design tuning in simulation to obtain the desired response before manufacturing. This process can be time consuming due to the large number of computational electromagnetic simulations required. This paper presents a simple space mapping approach to automate this final tuning process, which requires a significantly reduced number of full wave simulations. A third order groove gap waveguide filter at 14 GHz is presented as an example to illustrate the method and its utility.