Based on the analysis of rectangular periodic structures, the resonance frequency band is found to be shifted and broadened from low frequency to high frequency by adjustment of the corresponding structure size. Computer simulation shows that a miniature split-ring resonator can enhance and broaden resonance frequency without changing the stop-band location. According to the theoretical parameters, different experimental samples can be fabricated. The experimental results are generally the same as those predicted theoretically. A comparison of the experimental and theoretical results concluded that a miniature periodic structure broadened the frequency of the stop band and enhanced the resonance frequency, which are important for the study of left-handed materials.
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