文章基本信息

标题：Design of a Suspended Stripline Narrow Bandpass Filter with Ultrawideband Harmonic Suppression
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作者：Ju Seong Park ; Wahab Mohyuddin ; Hyun Chul Choi 等
期刊名称：International Journal of Antennas and Propagation
印刷版ISSN：1687-5869
电子版ISSN：1687-5877
出版年度：2018
卷号：2018
DOI：10.1155/2018/9029240
出版社：Hindawi Publishing Corporation
摘要：A design method of narrow bandpass filters (NBPFs) of 4–6% bandwidth with ultrawideband suppression of harmonic passbands, utilizing two cascaded step impedance resonators (SIRs) in a suspended stripline, is proposed in this paper. The proposed design utilized the characteristics of a suspended stripline, which provides a much higher characteristic impedance ratio as compared with that of the microstripline, enabling ultrawideband harmonic suppression. As an example of the NBPF, a filter with a passband center frequency of 0.75 GHz and bandwidth of 5% was implemented and proved to suppress the harmonic passbands up to . Since the proposed filter was implemented on the suspended stripline, the passband insertion loss was only −0.9 dB, which is low as compared with other previous designs. The proposed filter is a compact high-performance low-loss NBPF, which can be applicable to various wireless systems.