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In this article, a harmonic suppressed patch dual-mode bandpass filter (BPF) with open stubs is presented. For harmonic suppression, equivalent T-shaped transmission lines replace connecting transmission lines. The added shunt open stubs in the T-shaped lines work as band-stop filters (BSFs) at the harmonics. A dual-mode filter is designed and fabricated with fractional bandwidth of 5 % at 2 GHz with...
In this paper, integration of bandstop filter with the flexible narrow bandwidth of bandpass filter with lambdag/2 open stubs by microstrip line on duroid substrate is presented. This kind of filter shows flexible bandwidth with variation of the position of the open stubs using the external quality factor, Qe without changing the impedance value at microwave range. On the other hand, by replacing...
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