Friday, 27 February 2015

Spurious resonance suppression for a THz single bandpass filter using lossy glass substrates

Dongju Kim, Sung-Hwa Eo, Se-I Oh andJae-Hyung Jang



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


This study was performed using TeraView's Spectra 3000 system. (TeraView, Cambridge, UK)