Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 19, Issue 1, Pages 18-20Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2008.2008538
Keywords
Artificial lines; band-pass filter (BPF); dual-band; metamaterials; negative-refractive-index transmission-lines (NRI-TL)
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A dual-band bandpass filter is presented. The filter is composed of generalized negative-refractive-index transmission-lines (NRI-TL) realized in microstrip. The filtering mechanism relies on all four of the generalized NRI-TLs' left-handed and right-handed passbands. Under the closed stopband condition, two passbands are achieved. A complete design procedure is described. A fabricated example measures 0.25 lambda(o) x 0.25 lambda(o), where omega(o) is the wavelength of the center frequency of the stopband. Maximum insertion loss in the passbands (centered around 4 GHz) is measured at 1.5 dB.
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