Compact tri-band bandpass filter using three stub-loaded open-loop resonator with wide stopband and improved bandwidth response

被引:22
作者
Kumar, N. [1 ]
Singh, Y. K. [1 ]
机构
[1] Indian Inst Technol, Dept Elect Engn, Patna, Bihar, India
关键词
D O I
10.1049/el.2014.3425
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A compact three stub-loaded open-loop resonator-based tri-band band-pass filter with better out-of-band suppression is presented. The position and length of the three stubs loaded to an open-loop resonator determine the position of the three passbands. Mathematical analysis has also been performed to calculate the resonance condition of the proposed resonator. To demonstrate the concept, two second-order filters are fabricated having three passbands centred at f(o) = 1.93 GHz, f(1) = 3.6 GHz, f(2) = 4.89 GHz and f(o) = 1.59 GHz, f(1) = 3.12 GHz, f(2) = 4.02 GHz, respectively. The fabricated filters show better 3 dB bandwidth as well. The simulation and measured results are in good agreement.
引用
收藏
页码:1950 / 1951
页数:2
相关论文
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