微带线直角弯曲最佳斜切率研究

Abstract

Abstract:

In a high-speed circuit, microstrip characteristic impedance discontinuity caused by the right angle bend of PCB traces affects the quality of the signal transmission seriously. The numerical results of the impact of microstrip structure parameters and relative dielectric constant on the optimal percentage miter M of trace right angle bend with a 45°out miter are obtained. Based on the principle of least squares, the formula for M versus the width-to-height ratio w/h is presented by fitting the numerical results with MATLAB. Similarly, the linear expression for M versus the relative dielectric constant is also presented for the 50Ω line. The results show that the trace right-angle bend with a 45°out optimal percentage miter makes the quality of the signal transmission best. And the impact of relative dielectric constant and thickness of microstrip on M is not obvious, but the impact of w/h on M is significant.

Key words: microstrip, right angle bend, 45°miter, optimal percentage miter

CLC Number:

TN817

LU Hong-min;WU Bao-yi;YAO Zhi-cheng;WAN Lian-cheng. Research on the optimal percentage miter of the microstrip right angle bend[J].J4, 2009, 36(5): 885-889.

References

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Research on the optimal percentage miter of the microstrip right angle bend

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