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With the assistance of modified coupled inductors, novel multilayered bandpass filters are developed in this paper. Two or three transmission zeros appear on both sides of the passband skirt easily by incorporating the proposed structures. In order to fabricate compact multilayered bandpass filters, the low-temperature co-fired ceramic technology is also employed. In addition, the equivalent circuits...
The microstrip bandpass filter with wide stopband range is presented. This filter is constructed by inserting the resonance circuit into the coupled capacitively-load lines. Using the resonance circuits to compensate the even- and odd-mode velocity of the coupled capacitively-load lines, the higher-ordered harmonic frequency can be reduced. The 40-dB stopband suppression level is obtained up to four...
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