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Recently, antennas using metamaterials have been studied actively [1]. There have been many reports about leaky wave antennas using a composite right/left-handed transmission line (CRLH-TL), especially microstrip lines [2][3]. The features of this antenna are that, a wide range beam scanning can be achieved [4] and, a zeroth-order resonator (ZOR), whose phase and amplitude are constant along the line,...
Metamaterials have an artificial structure, where unit cells are arranged at intervals shorter than the operation wavelength. Having their unique characteristics which are not found in nature, they have been receiving a lot of attention [1]. For example, the size of a metamaterial antenna is smaller than that of a conventional one. Moreover, a composite right/left-handed transmission line (CRLH-TL)...
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