APEMC conference in Shenzhen, China

Attended the 7th Asia-Pacific International Symposium on Electromagnetic Compatibility & Signal Integrity and Technical Exhibition (APEMC2016) at the The Shenzhen Convention and Exhibition Center in Shenzhen this week.

I presented a paper on the shadowing effects in stacks of PCBs by looking at how the absorption cross-section (ACS) measured using a reverberation chamber changes (Parker et al., 2016). The overall energy absorption is significantly reduced by the close spacing of the PCBs in a stack.

The content of the papers is part of the Shielding measurement of electrically large enclosures with contents collaboration project between Huawei Technologies and the AEG.

Some papers I found particularly interesting during the conference were Perry Wilson’s paper on the correspondence between acoustic and electromagnetic reverberation chambers (Wilson2016), Zhao Yuan et al’s paper on the statistical analysis of fields in electrically large enclosures (Zhao2016) and Cao Zhangshuai et al’s paper on nonlinear scattering is a reverberation chamber (Cao2016).

References

1. Parker, S.L., Flintoft, I.D., Marvin, A.C., Dawson, J.F., Bale, S.J., Robinson, M.P., Ye, M., Wan, C. and Zhang, M., 2016. Absorption cross section measurement of stacked PCBs in a reverberation chamber. In: 2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC). Shenzhen, China, pp.991–993.
   

   The Absorption Cross Section (ACS) of Printed Circuit Boards (PCBs) can be used to help determine how PCBs affect the internal electromagnetic (EM) field in a shielded enclosure and thus the enclosure shielding effectiveness. Stacked PCBs inside densely populated enclosures may not have the same ACS as the sum of the individual PCBs due to ‘shadowing’ effects. In this paper ACS measurement results from stacked PCBs are presented. The results show that stacking the PCBs close together reduces the ACS and this effect is increased with a greater number of PCBs.

   @inproceedings{Parker2016b,
     booktitle = {2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)},
     month = {18-21 May},
     address = {Shenzhen, China},
     author = {Parker, S. L. and Flintoft, I. D. and Marvin, A. C. and Dawson, J. F. and Bale, S. J. and Robinson, M. P. and Ye, M. and Wan, C. and Zhang, M.},
     title = {Absorption cross section measurement of stacked PCBs in a reverberation chamber},
     year = {2016},
     pages = {991-993},
     note = {Date of acceptance: 29/01/2016. © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.},
     doi = {10.1109/APEMC.2016.7522925},
     file = {:pdfs/APEMC2016-Parker-991.pdf:PDF},
     keywords = {shielding, absorption cross section, reverberation chamber, printed circuit board},
     postprint = {https://pure.york.ac.uk/portal/files/49498135/APEMC_Stacked_Measurements_postprint.pdf}
   }