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《Materials Review》 2007-S2
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Miniaturization of Low-pass Filter Based on CSRR

AI Juan,LIAO Bin (Department of Electronic Engineering,East China Normal University,Shanghai 200062)  
A method using the complementary split ring resonators (CSRR) to miniaturize low-pass filters is presented in this paper. According to the equivalent circuits, the impacts of the radius, width of the open gap and width of the gap between the outer and inner rings are investigated. It is found that increasing the radius of the ring and decreasing the width of the open gap lowers the cut-off frequency, and that widening the gap between the outer and inner rings results in better suppression of the band. The cut-off frequency of the low-pass filter is, thereby, decreased without enlarging its size, and the miniaturization of the low-pass filter is realized.
【CateGory Index】: TN713.4
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