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Miniaturized periodic stepped-impedance ring filter with patterned ground plane is proposed. The size of a ring filter can be significantly reduced, along with an extended upper stopband by introducing the periodic stepped-impedance structure and patterned ground plane. Based on the even- and odd-mode networks, the mode splitting characteristics and impact of the patterned ground plane on the electrical...
<para> Miniaturized dual-mode ring bandpass filters with a patterned ground plane are proposed. By loading the resonator periodically with the butterfly radial slot cells on the ground plane, the size of a ring filter is reduced along with an extended upper stopband. Based on the equivalent circuits, the mode-splitting characteristics and impact of the patterned ground plane on the electrical...
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