Wideband bandpass filter with high selectivity based on dual-mode DGS resonator

详细信息    查看全文

• 作者：Biao Peng ; Shufang Li ; Jianfeng Zhu ; Qianyun Zhang ; Li Deng ; Qingsheng Zeng and Yue Gao
• 刊名：Microwave and Optical Technology Letters
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：58
• 期：10
• 页码：2300-2303
• 全文大小：698K
• ISSN：1098-2760

文摘

A wideband bandpass filter based on dual-mode defected ground structure resonator (DGSR) is designed and effectively analysed by utilising the even-/odd-mode theory and equivalent circuit models. The lower and upper cutoff frequencies of the filter can be independently tuned by adjusing the even- and odd-mode resonant frequencies of the dual-mode DGSR, respectively. The fabricated prototype is centred at 2.27 GHz with a wide bandwidth (FBW 63.4%), low insertion loss (0.386 dB), high selectivity and wide stopband. The attenuation slopes in the lower and upper passband transitions are 108.5 and 136.9 dB/GHz, respectively. The stopband rejection is better than 22 dB up to 6 GHz (2.6 f₀).