基于信号干扰理论的差分带通滤波器

doi:10.13229/j.cnki.jdxbgxb201703043

Abstract

Abstract: In this paper, application of signal interference technology to design a differential mode wideband bandpass filter and to suppress common mode noise is proposed. Due to symmetry and reciprocal property of this filter in common plane, symmetrical line is used as perfect electric wall for differential mode excitation and perfect magnetic wall for common mode excitation. To verify the presented concept, the prototype (mm) was designed and fabricated. The experimental results shows that the center frequency for differential mode bandpass filter is 7.85 GHz , the maximum return loss is less than -25dB ,3 dB fractional bandwidth is 61%, insertion loss is less than 0.2 dB and common mode rejection is lower than -20 dB for common mode (5.5~10.2 GHz). Good agreement can be observed between measured results and theoretical expectations.

Key words: electromagnetism, microstrip bandpass filter, signal interference technology, differential mode, common mode

CLC Number:

TN713

ZHANG You-jun, LIU Xiao-yuan. Novel differential wideband bandpass filter based on signal interference technology[J].吉林大学学报(工学版), 2017, 47(3): 1003-1008.

References

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