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In this paper, a novel compact dual-band bandpass filter using stepped impedance resonators (SIRs) with open-stub is presented. This filter is composed of two half-wavelength SIRs and open stubs. With properly coupled structure, this filter has compact size. The frequency response of dual-band at 2.4/5.7 GHz can be achieved by adjusting the impedance ratio (K) of SIR and the size of open stub. Simulated...
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