Abstract
Narrowband metamaterial-based filters using an array of split ring resonator (SRR) unit cells exhibit multiband operating characteristics due to the low frequency L-C resonance together with the high frequency dipole resonance of the SRR structure. To obtain single-band characteristics from the metamaterial-based terahertz (THz) band pass filter (BPF), the unwanted dipole resonance at high frequency should be suppressed. A lossy glass was used for a substrate for THz BPF that consists of a complementary split ring resonator (CSRR) to suppress the undesirable resonances at higher frequencies. The resulting CSRR filter on a glass substrate exhibited single-band BPF characteristics with a spurious band rejection ratio over 50 dB. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:58–60, 2015
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