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This paper develops a novel microstrip bandpass filter with a wide stopband. With the assistance of open stubs and one open-circuit coupled line using symmetrical feeding, a wide stopband with a sufficient rejection level can be achieved. Detail design and synthesis procedures are provided. Moreover, the electromagnetic simulator IE3D is used, and the prototype of the bandpass filter is fabricated...
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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