Electromagnetic coupling to cables has been a major source of EMC and EMI problems. In this paper, the methods of predicting the EM coupling and propagation in multiconductor transmission lines are presented. Crosstalk is an important aspect of the design of an electromagnetically compatible product. This essentially refers to the unintended electromagnetic coupling between wires and PCB lands that are in close proximity. Crosstalk is distinguished from antenna coupling in that it is a near field coupling problem. Crosstalk between wires in cables or between lands on PCBs concerns the intra-system interference performance of the product, that is, the source of the electromagnetic emission and the receptor of this emission are within the same system. With clock speeds and data transfer rates in digital computers steadily increasing, crosstalk between lands on PCBs is becoming a significant mechanism for interference in modern digital systems. To predict the crosstalk we designed a simple model of three conducting wires and took measurements for both nearend and farend crosstalk. Also the same model is being simulated by CST Microwave Studio (3D Electromagnetic Solver).
2. Paul, C. R., Crosstalk, Handbook of Electromagnetic Compatibility, Chapter 2, Part II, Academic Press, San Diego, CA, 1995.
3. Tripathi, R., R. Gangwar, and N. Singh, "Reduction of crosstalk in wavelength division multiplexed fiber optic communication systems," Progress In Electromagnetics Research, Vol. 77, 367-378, 2007.
doi:10.2528/PIER07081002
4. Chen, H. and Y. Zhang, "A synthetic design of eliminating crosstalk within MTLS," Progress In Electromagnetics Research, Vol. 76, 211-221, 2007.
doi:10.2528/PIER07070603
5. Kirawanich, P., J. R. Wilson, N. E. Islam, and S. J. Yakura, "Minimizing crosstalks in unshielded twisted-pair cables by using electromagnetic topology techniques," Progress In Electromagnetics Research, Vol. 63, 125-140, 2006.
doi:10.2528/PIER06042603
6. Kirawanich, P., N. E. Islam, and S. J. Yakura, "An electromagnetic topology approach: Crosstalk characterizations of the unshielded twisted-pair cable," Progress In Electromagnetics Research, Vol. 58, 285-299, 2006.
doi:10.2528/PIER05091901
7. Paul, C. R. and A. E. Feather, "Computation of the transmissionline inductance and capacitance matrices from the generalized capacitance matrix," IEEE Trans. Electromagn. Compat., Vol. 18, No. 4, 175-183, Nov. 1976.
doi:10.1109/TEMC.1976.303498
8. Paul, C. R., "Solution of the transmission line equations for three-conductor lines in homogeneous media," IEEE Trans. Electromagn. Compat., Vol. 20, 216-222, 1978.
doi:10.1109/TEMC.1978.303651
9. Bernardi, P., R. Cicchetti, G. Pelosi, A. Reatti, S. Selleri, and M. Tatini, "An equivalent circuit for EMI prediction in printed circuit boards featuring a straight-to-bent microstrip line coupling," Progress In Electromagnetics Research B, Vol. 5, 107-118, 2008.
doi:10.2528/PIERB08020502
10. Paul, C. R., "Solution of the transmission-line equations under the weak-coupling assumption," IEEE Trans. Electromagn. Compat., Vol. 44, No. 3, 413-424, Aug. 2002.
doi:10.1109/TEMC.2002.801753
11. Chai, C., B. K. Chung, and H. T. Chuah, "Simple time-domain expressions for prediction of crosstalk on coupled microstrip lines," Progress In Electromagnetics Research, Vol. 39, 147-175, 2003.
doi:10.2528/PIER02060902
12. Paul, C. R., "On the superposition of inductive and capacitive coupling in crosstalk prediction models," IEEE Trans. Electromag. Compat., Vol. 24, 335-343, 1982.
doi:10.1109/TEMC.1982.304045
13. Xiao, F. and Y. Kami, "Modeling and analysis of crosstalk between differential lines in high-speed interconnects," PIERS Online, Vol. 3, No. 8, 1293-1297, 2007.
doi:10.2529/PIERS070320011226
14. Xiao, F., R. Hashimoto, K. Murano, and Y. Kami, "Analysis of crosstalk between single-ended and differential lines," PIERS Online, Vol. 3, No. 1, 16-20, 2007.
doi:10.2529/PIERS060904050207
15. CST Microwave Studio, Version 5 manual,.
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