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In order to meet the ever increasing demand for miniaturization of RF and microwave filters, the suitability of fractal resonators has been examined and a complete design method of miniaturized fractal filters has been developed. It is shown that fractal resonators can significantly be smaller than conventional planar resonators for the same resonant frequency requirements. It is also seen that when...
The filters are composed of a cascade of non-loaded rectangular cavities where several resonant modes are considered. The cavities are interconnected through rectangular waveguide sections. All resonant modes are used near their cutoff frequencies to reduce the size of the filters. Rather than relying on modeling the coupling coefficients between cavities, the technique is based on defining multimodal...
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