Dual-band filter design with pole-zero distribution in the complex frequency plane

Xiao-Feng Sun, E. L. Tan
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引用次数: 3

Abstract

This paper presents the dual-band filter design with pole-zero distribution in the complex frequency plane. Based on specifications, the poles and zeros of each passband can be distributed as desired, such as having poles on typical Butterworth/Bessel circle, Chebyshev ellipse, etc. This can provide different passband responses to meet different specifications of each band. In order to make more obvious the two passbands with different pole-zero distributions in the complex frequency plane, a filter is illustrated with the Butterworth response for its first band and the Chebyshev response for its second band. The simulation and measurement results are found to be in good agreement.
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复频率平面上极点零分布的双带滤波器设计
本文提出了复频率平面上极点零分布的双带滤波器设计。根据规范,每个通带的极点和零点可以按需要分布,例如在典型的巴特沃斯/贝塞尔圆,切比雪夫椭圆等上具有极点。这样可以提供不同的通带响应,以满足每个频段的不同规格。为了使复频率平面上具有不同极零分布的两个通带更加明显,用巴特沃斯响应和切比雪夫响应分别表示一个滤波器的第一带和第二带。仿真结果与实测结果吻合较好。
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