New dual-mode square patch bandpass filter using CSRR slot-type perturbation
2014
Abstract A compact dual-mode microstrip bandpass filter using square-patch resonator and a new perturbation element is designed in this letter. This new slot-type element is composed by a complement split-ring resonator (CSRR) with two pairs of etching slots. The nature of coupling between the degenerate modes is investigated with respect to the perturbation size. By proper arranging the orientations of the CSRRs, new coupling characteristics can be obtained. The proposed dual mode bandpass filters are designed, and simulated. The simulation and measure results of proposed bandpass filter are reasonable.
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