Abstract
A resonator based metamaterial sensor to detect unknown materials is proposed in this article. The metamaterial structure consists of a resonator, which is surrounded by a partial ground frame and excited by a microstrip feeding transmission line. Having a geometric size of 30 x 30 mm(2), the metamaterial is printed on Rogers RO3010 (tm) substrate with the relative permittivity of 10.2. Numbers of unit cells are needed for traditional metamaterial design, whereas the proposed metamaterial structure has only one cell, which can achieve the metamaterial properties. The aim of the study is to apply the metamaterial in sensor applications and the results exhibit that the metamaterial is appropriate for the microwave sensor applications.