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Abstract
A new microstrip triple-band bandpass filter (BPF) using a variation of genetic algorithm (VGA) is proposed in this paper. The VGA is applied to simultaneously search for the appropriate circuit topology and the corresponding electrical parameters with a triple-band characteristic. To demonstrate the effectiveness of the VGA, a triple-band BPF is designed and fabricated. In the filter, the 3 dB fractional bandwidths for the three passbands centered at 2.05, 3.57, and 5.81 GHz are 14.63, 11.20, and 7.57%, respectively. Measurement results agree well with the design index and full-wave EM simulated results.
Acknowledgments
This work was supported by the Nature Science Foundation of China under Grant Nos. 61101047 and 61271025, the Zijin Foundation under Grant AB41372, and the Specialized Research Fund for the Doctoral Program by the Ministry of Education of China under Grant No. 20113219120015.