Abstract
According to Babinet's principle a square complementary asymmetric split ring resonator (caSRR) is proposed. Interestingly, due to the particularity of the caSRR structure, it can be fabricated on a mental sheet without the substrate, which is named as Stereo-caSRR. A microwave sensor which consists of a rectangular waveguide loaded with the square stereo-caSRR is designed. Simulation results show that the square Stereo-caSRR possesses a much higher Q-factor compared with traditional planar caSRR since the influence of the lossy substance has been eliminated. The stereo-caSRR assisted microwave sensor has a good linearity since the electric field can be confined to the arm of the resonator which is quite sensitive to a small change dielectric environment.
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