Abstract
In this paper, a Slotted Stepped-Impedance Resonator (SSIR) is proposed. Due to the slots in the low-impedance section of the conventional SIR, the new resonator has a lower fundamental resonance f 0 and can provide a potential finite transmission zero f z close to f 0. Based on the proposed SSIR, a fourth-order Chebychev BandPass Filter (BPF) is designed at f 0=1 GHz. The measured results show that a better than −65 dB rejection is achieved on both the lower and the upper stopband. Moreover, the new filter has a wide −30 dB rejection upper stopband from 1.13f 0 to 6.52f 0. The fabricated filter exhibits a size of 0.078 λ g × 0.062λ g . The new filter has a planar topology and is easily integrated with modern portable communication systems.
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Communication author: Xu Jin, born in 1987, male, Ph.D..
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Xu, J., Ji, Y., Miao, C. et al. Compact Bandpass Filter with high selectivity and wide stopband using Slotted Stepped-Impedance Resonator. J. Electron.(China) 29, 23–26 (2012). https://doi.org/10.1007/s11767-012-0780-4
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DOI: https://doi.org/10.1007/s11767-012-0780-4