Investigation and Analysis of the Over-Braid Phenomena in Flexible Coaxial Cables

摘要

Shielding Effectiveness, or Screening Attenuation as it is often referred to, is probably the single-most important characteristic regarding the design of flexible coaxial cables. Technological developments in the CATV industry such as the return path, added bandwidth for system upgrades, VOIP and the eventual full transition to digital channels have even further enhanced the importance of the shielding characteristics of flexible coaxial cables, also known as Drop cables. Conventional wisdom assumes that the greater the optical braid coverage of a standard shield Drop cable, the better the shielding effectiveness. Recent studies contradict this logic. This paper will discuss the over-braid phenomena and examine the variables that affect the shielding effectiveness performance of standard shield Drop cables.