The IWCS Webinar SeriesLive Webinars with Q&A’s are held on the third Friday of every month at 10:30 am Eastern USA.
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December 15, 2017 10:30 am Eastern Daylight Time
Long-term Effect of Thermal Variation on Performance of Ethernet Cabling Dialectrics
Speaker: Florence Akinnuoye, PhD Student, De Montfort University School of Engineering & Sustainable Development (Leicester, UK)
Abstract: Currently, remote powering over the Ethernet (including PoE, PoE+, etc.) has emerged as a cost-effective option to power networked devices using balanced twisted pair cabling. Power delivery through Ethernet cables has numerous benefits including space saving and, of course, the ‘green’ benefit of using fewer natural resources. However, this raises several questions: could a combination of the transmission of high power and consequent increased ambient (local) temperature affect the performance of the cable dielectrics? How far would the change in the dielectric property affect cable performance, including throughput and Ethernet signal integrity?
The dielectric constant of different insulation types used in Ethernet cabling was examined at a room temperature to establish performance at 1GHz, 2.4GHz and 5GHz. Then, at 60⁰C to observe the effect of an increase in temperature on the performance of the dielectrics across the three frequencies. Moreover, Foamed-Skin HDPE was thermally cycled between the room temperature and 60⁰C to study the effect of thermal variation on its dielectric constant. The last study cycled the Foamed-Skin HDPE up to 90⁰C to observe both the transient and permanent changes in the value of the dielectric constant.
In this study, it was found that increase in temperature has effects on the dielectric constant of all the dielectrics evaluated from the first heating cycle. In addition, thermal cycling showed a remarkable non-reversible modification in the dielectric constant of the Foam-Skin HDPE at 60⁰C. The study further established the marked effect of an increase in ambient temperature on the physical and rheological behavior of dielectric materials.
Bio: Florence S. Akinnuoye graduated with a Bachelor of Technology in Computer Science from the Federal University of Technology Akure (FUTA) Ondo State, Nigeria. She received her Master of Science degree in Communications Engineering from De Montfort University, Leicester in 2011. She is now a PhD student studying the impact of temperature on data cable performance.