Bandpass Filter Based on Spoof Surface Plasmon Polaritons With Wide Stopband

Abstract

This paper put forward spoof surface plasmon polaritons (SSPPs) and resonator to design a bandpass filter (BPF) with wide stopband. First of all, the raised SSPPs is analyzed the dispersion characteristic, which was accompanied by a low-pass filter that devised on account of them. Next, T-shaped resonator was used to design BPF structure. Finally, based on the proposed SSPPs and T-shaped resonator, a BPF with wide stopband can be designed in the frequency range of 1.5-5.1 GHz.