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Вопрос 148

Which of the following conductors is preferred for bonding at RF?

  1. Copper braid removed from coaxial cable
  2. Copper-clad steel wire
  3. Twisted-pair cable
  4. Flat copper strapПравильный ответ

Объяснение

At RF the important quantity is inductance, not just DC resistance, and a wide flat strap has much lower inductance than round wire of the same weight because of its larger surface and shorter effective path. Braid removed from coax corrodes and loses conductivity, and twisted pair is unsuitable.

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Вопрос 148: Which of the following conductors is preferred for bonding… · FCC Technician Class (Element 2) · Questena