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In this study, A multi band and dual band antenna using slot stepped-impedance resonators(SIR) and coplanar waveguide (CPW) feeding have been investigated. All of the proposed antennas are fabricated on 1-mm FR4 substrates with a dielectric constant of 4.4 and a loss tangent of 0.02. In comparison to the conventional uniform — impedance resonator (UIR), the SIR shows a better control over spurious...
A compact high-selectivity microstrip tri-band bandpass filter (BPF) using a multimode short stub-loaded symmetric loop resonator (SLSLR) with a feed structure is proposed in this paper. Distinct mode splitting characteristics of the quadruple-mode SLSLR are investigated and explained by using even-and odd-mode theory. The dual-band BPF is realized using the quadruple-mode SLSLR. Then, the high-impedance...
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