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DB3TK
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re: Plastic wires rival copper at 20 percent the weight
DB3TK   12/16/2008 2:13:56 PM
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At frequencies where the skin effect dominates the conductor resistance of solid copper, it will definitely work - the inner part of a copper conductor is just dead weight when 90% or more of the current are carried in a layer a few µm below the surface. Since Integral produces antennas for up to 2.4GHz, I assume that they plan to use the metallized plastic in coax conductors.

daleinaz
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re: Plastic wires rival copper at 20 percent the weight
daleinaz   11/13/2008 11:45:52 PM
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Intresting... I assume you would need a larger diameter (cross-section) for the same current capacity. Still, this could be especially valuable in automobiles, the wiring harness weight is ~50 lbs, cutting that by 80% would help fuel economy. But I'm puzzled - if the current is carried by metal fibers (and not by the plastic itself), it seems like you'd need the same amount of metal. Also this seems like a great material for enclosures for laptops/cellphones/etc., as it is moldable but provides EMI/ESD/RFI protection.

Mike K.
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re: Plastic wires rival copper at 20 percent the weight
Mike K.   11/7/2008 8:53:04 PM
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Fascinating, but seemingly very backwards when environmental performance characteristics are considered. First, this is based on a polymer, presumably from a non-renewable resource. Second, it's not clear that it's easily recyclable - how are the metals and the polymers separated? Third, it probably requires the use of phthalates and possibly flame retardants, chemical substance classes that are coming in to scrutiny in Europe and elsewhere. On the positive side since the weight is lower it might cost less (and use less energy) to transport.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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