We present two versions of the reconfigurable composite triple split-ring resonators (C3SRRs). Reconfigurability is achieved by means of the de-tuning technique that enables obtaining different dual-band and single-band composite resonators from one triple-band topology. Five different configurations are obtained using the first topology: one triple-band, two dual-band and two single-band C3SRRs. The second topology provides seven different configurations: one triple-band, three dual-band and three single-band C3SRRs. PIN diodes are used as switching elements, which are placed on the vertical branches of split-ring resonators so that the filter insertion loss does not increase. Measured and simulated data are compared and excellent agreement is obtained.
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Ninić et al. (2016) studied this question.
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