In this article, a new high‐loaded quality factor (QL) resonator using combination of a stepped impedance resonator‐shaped hair‐pin resonator, interdigital capacitor, and a meander‐line with μ‐near‐zero (MNZ) metamaterial is suggested. An interdigital capacitor is applied to the resonator to obtain high‐QL performance and MNZ characteristic for size reduction. The resonator is designed to operate at 10 GHz, and the experimental result shows the Q‐factor value of 167. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1781–1785, 2014

No abstract

No abstract

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 µ‐near zero (MNZ) metamaterial is suggested. The MNZ metamaterial resonator has band‐stop resonance and positive phase response (+90°) due to zero‐value permeability. The experimental result of the resonator shows the loaded quality factor (QL) 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 × 5.39 mm2. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1956–1960, 2014

In this paper, a new planar folded UHF band RFID reader antenna is suggested. For the antenna suggested in this paper, 4 PIFA (Planar Inverted F Antenna) micro-strip structures are adopted. The size is 50 mm × 50 mm × 6.2 mm. The gain of the antenna is 1.1 dBi, the VSWR is 1.2:1, and the efficiency is 63.3 %. The radiation pattern is designed as upper direction. Identification distance for the RFID tags is improved by minimizing hand effects with properly integrating 4 PIFAs.