Crosstalk reduction is analyzed for a reconfigured category-five cable network using electromagnetic topology-based simulation. The reconfigured network results in a marked reduction in inductive near-end crosstalk for the unshielded twisted-pair cable network. Analyses show that half-loop shifting of the generator-pair wires placed next to the receptor is the most effective way to control the near-end crosstalk level. This is primarily due to additional coupling sources induced on receptor wires that effectively deactivate the original cross coupling effect. The analysis also reveals the usefulness of electromagnetic topology-based simulations. The technique applied in this paper is applicable for any large network systems. A sub-network compaction scheme is critical in creating the equivalent junctions that provide a significant reduction in total computational time and total computer memory requirement for analyzing large network systems. For a 5.28-m long cable we have considered in this paper, the results are valid up to 10 MHz.
1. Celozzi, S. and M. Feliziani, "EMP-coupling to twisted-wire cables," IEEE Int. Symp. on EMC, 21-23, 1990.
2. Maki, M., et al., "Home information wiring system using UTP cable for IEEE 1394 and Ethernet systems," IEEE Trans. Consumer Electron., Vol. 47, No. 4, 921-927, 2001. doi:10.1109/30.982809
3. Paul, C. R. and J. W. McKnight, "Prediction of crosstalk involving twisted-pairs of wires-part I: a transmission-line model for twistedwire pairs," IEEE Trans. Electromagn. Compat., Vol. EMC-21, No. 2, 92-105, 1979.
4. Paul, C. R. and J. W. McKnight, "Prediction of crosstalk involving twisted-pairs of wires-part II: a simplified lowfrequencyprediction model," IEEE Trans. Electromagn. Compat., Vol. EMC-21, No. 2, 105-114, 1979.
5. Piper, G. R. and A. PrataJr., "Magnetic ux densitypro duced byfinite-length twisted-wire pairs," IEEE Trans. Electromagn. Compat., Vol. 38, No. 1, 84-92, 1996. doi:10.1109/15.485701
6. Taylor, C. D. and J. P. Castillo, "On the response of a terminated twisted-wire cable excited bya plane-wave electromagnetic field," IEEE Trans. Electromagn. Compat., Vol. EMC-22, No. 1, 16-19, 1980.
7. IEEE 802.3 Working Group, IEEE Standard 802.3u 1995Ed., (Supplement to ISO/IEC 8802-3: 1993; ANSI/IEEE Std 802.3,1993 Ed.).
8. Parmantier, J. P. and P. Degauque, "Topologybased modeling of verylarge systems," Modern Radio Sci., 151-177, 1996.
9. Baum, C. E., "Electromagnetic topology: a formal approach to the analysis and design of complex electronic systems," Interaction Notes, 1980.
10. Parmantier, J. P. and J. P. Aparicio, "Electromagnetic topology: coupling of two wires through an aperture," Int. Zurich EMC Symp., 12-14, 1991.
11. Baum, C. E., "The theoryof the electromagnetic interference control," Interaction Notes, 1989.
12. Kirawanich, P., N. E. Islam, and S. J. Yakura, "An electromagnetic topological approach: crosstalk characterization of the unshielded twisted-pair cable," Progress In Electromagnetics Research, Vol. 58, 285-299, 2006. doi:10.2528/PIER05091901
13. Eswarappa, C., G. I. Costache, and W. J. R. Hoefer, "Transmission line matrix modeling of disperse wide-band absorbing boundaries with time-domain diakoptics for Sparameter extraction," IEEE Trans. Microwave Theory Tech., Vol. 38, No. 4, 379-386, 1990. doi:10.1109/22.52578