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This paper presents a novel low-pass filter (LPF) with sharp rejection, wide stopband and compact size, which are realized by the defected ground structure (DGS) and the defected microstrip structure (DMS). The equivalent circuit model is proposed and the circuit parameters are extracted by the circuit simulation software. The parameters measured are 3 dB cutoff frequency fc of 5.2 GHz, the insertion loss less than 0.5 dB from DC to 4.0 GHz and S21 less than -20 dB within the wide stopband from 6 GHz to 16 GHz. The results of the circuit optimization agree well with those of the full wave simulation and the measured ones, which validate the effectiveness of the equivalent circuit model. The size of the proposed LPF is decreased compared with normal LPF. This LPF can be applied in rectennas to eliminate high order harmonics.  相似文献   
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响应“互联网+教育”的发展趋势,结合高等职业教育特色,采用信息化教学与项目化教学相结合的方式,组织学生借助“航线设计能力训练网站”,模拟航线设计的工作过程,提高了学生的专业技能与信息化技术应用水平.  相似文献   
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