A new compact narrow bandwidth slow-wave band-pass filter with high-Q resonators using μ-near zero metamaterial

In this article, a new compact narrow bandwidth slow-wave band-pass filter (BPF) using combination of stepped impedance resonator-shaped hair-pin, interdigital capacitor, and meander-line resonator with mu-near zero (MNZ) metamaterial is suggested. The MNZ metamaterial resonator has band-stop resonance and positive phase response (+90 degrees) due to zero-value permeability. The experimental result of the resonator shows the loaded quality factor (Q(L)) of 249 at the resonant frequency of 10.0 GHz. Also, the insertion and return losses of the proposed BPF are 1.49 and 15.0 dB with the bandwidth of 4% and center frequency of 10 GHz, respectively. The size of the proposed BPF is 4.79 x 5.39 mm(2). (c) 2014 Wiley Periodicals, Inc.