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In this letter, a printed planar filtering antenna composed of the stepped-impedance dipole (SID), stepped-impedance resonator (SIR), and low-pass filter (LPF) is presented. The SIR is used as a parasitic element in proximity to the SID radiator to improve its upper band-edge selectivity and to widen its operation bandwidth. Our extensive study is at first conducted to exhibit that the upper harmonic...
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