Microwave Devices on a Planar Mushroom-Shaped Metamaterials with Extention of Rejection Band Research

In this paper a study of microwave devices based on planar mushroom-shaped structures of metamaterials will be thoroughly examined. In particular, this paper is intended to cover some major issues pertaining to the rejection band of this metamaterial structures and the search of the methods for its extension will be successfully done. As a result, two key methods that open the way for increase the width of the rejection band without changing the overall parameters of structure have been suggested. After computer simulation it can be seen the two- to six-fold extension of the rejection band of modified metamaterial structure relatively to the traditional metamaterial structure. Obtained results provides positive influence on the areas of microwave electronics and antenna technology due to the ability to provide isolation of antenna array elements, multipath suppression in navigation systems, reducing the effect of various components on antenna patterns. Keywords: Microwave devices, Metamaterials, Frequency-Selective Surfaces, Rejection Band.