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2013-09-13
An Improved Model for Estimating Radiated Emissions from a PCB with Attached Cable
By
Progress In Electromagnetics Research M, Vol. 33, 17-29, 2013
Abstract
Common mode current induced on cable attached to a PCB has been a well-known source of unintentional radiated emissions. The coupling mechanism of the common mode current to the cable can be divided into two types: voltage-driven and current-driven. In voltage-driven mechanism, the common mode current is induced by electric field that couples from traces on PCB to the cable. Previous work showed that these radiated emissions can be estimate based on the self-capacitance of the trace and the signal return plane but the method is only reasonably accurate at lower frequency. This paper develops a model which gives an extended frequency range up to 800 MHz. The formulation for the equivalent common-mode voltage source is improved by taking into account the driving point impedance of the cable which behaves as a wire antenna. The radiated emissions estimated by the improved model match well with the values from 3D electromagnetic simulation of the original PCB with attached cable. It represents an improvement compared to earlier model by 11 dB at 400 MHz to 16 dB at 700 MHz for board size of 10 cm x 16 cm and cable length of 3 m. Similar improvements are obtained for other combinations of board size and cable length. The results show that the cable length is an important factor, in addition to the board area as suggested by earlier work, in determining the magnitude of the equivalent common-mode voltage source. Resonant of the wire antenna affects not only the radiated electromagnetic field but also the commonmode voltage source magnitude due to varying antenna impedances.
Citation
Jia Haw Goh Boon-Kuan Chung Eng Hock Lim Sheng-Chyan Lee , "An Improved Model for Estimating Radiated Emissions from a PCB with Attached Cable," Progress In Electromagnetics Research M, Vol. 33, 17-29, 2013.
doi:10.2528/PIERM13061101
http://www.jpier.org/PIERM/pier.php?paper=13061101
References

1. Hockanson, D., J. Drewniak, T. Hubing, T. van Doren, F. Sha, and M. Wilhelm, "Investigation of fundamental EMI source mechanisms driving common-mode radiation from printed circuit boards with attached cables," IEEE Trans. Electromagn. Compat., Vol. 38, No. 4, 557-566, Nov. 1996.
doi:10.1109/15.544310

2. Shim, H. W. and T. Hubing, "Model for estimating radiated emissions from a printed circuit boards with attached cables due to voltage driven sources," IEEE Trans. Electromagn. Compat., Vol. 47, No. 4, 899-907, Nov. 2005.
doi:10.1109/TEMC.2005.859060

3. Deng, S., T. Hubing, and D. Beetner, "Estimating maximum radiated emissions from printed circuit boards with an attached cable," IEEE Trans. Electromagn. Compat., Vol. 50, No. 1, 215-218, Feb. 2008.
doi:10.1109/TEMC.2007.915288

4. Wang, J., O. Fujiwara, and K. Sasabe, "A simple method for predicting common mode radiation from a cable attached to a conducting enclosure," Proc. 2001 APMC, 1119-1122, Taipei, Taiwan, 2001.

5. Kayano, Y., M. Tanaka, and H. Inoue, "Radiated emission from a PCB with an attached cable resulting from a nonzero ground plane impedance," Proc. IEEE Int. Symp. Electromagn. Compat., 955-960, Aug. 2005.

6. Hockanson, D. M., C.-W. Lam, J. L. Drewniak, T. H. Hubing, and T. P. van Doren, "Experimental and numerical investigations of fundamental radiation mechanisms in PCB designs with attached cable," Proc. IEEE Int. Symp. Electromagn. Compat., 305-310, Aug. 1996.

7. Shim, H. W. and T. H. Hubing, "Derivation of a closed-form approximate expression for the self-capacitance of a printed circuit board trace," IEEE Trans. Electromagn. Compat., Vol. 47, No. 4, 1004-1008, Nov. 2005.
doi:10.1109/TEMC.2005.859059

8. Park, H. H., H. Park, and H. S. Lee, "A simple method of estimating the radiated emission from a cable attached to a mobile device," IEEE Trans. Electromagn. Compat., Vol. 55, No. 2, 257-264, Apr. 2013.

9. Cooray, G. and V. Cooray, "Electromagnetic fields of a short electric dipole in free space - Revisited," Progress In Electromagnetics Research, Vol. 131, 357-373, 2012.

10. Ostadzadeh, S. R., M. Soleimani, and M. Tayarani, "A fuzzy model for computing input impedance of two coupled dipole antennas in the echelon form," Progress In Electromagnetics Research, Vol. 78, 265-283, 2008.
doi:10.2528/PIER07091004