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Recent content by Bisonriver

  1. Bisonriver

    CST simulation - Transmission Line Problem

    Part of the cable is inside a conduit of a ground support facility. The previous design made it extremely difficult to reach. Techs had to disconnect/remove other equipment in order to get it. Often times this creates more problems than fixing it. Therefore, I was tasked to model the faulty...
  2. Bisonriver

    CST simulation - Transmission Line Problem

    The shield was damaged unintentionally. In fact, there was a big hole on the shield although not completely broken apart. It might due to the abrasion or animal bite. Yes, the characteristic impedance is Z=sqrt((R+jwL)/(G+jwC)). My point is, does the damage of the shield (earth grounded)...
  3. Bisonriver

    CST simulation - Transmission Line Problem

    Thanks for you guys contribution. Here's the problem I would like to address (again). We have a tech at the other end of country saying that he measured an STP with a section of shield stripped off and the other section of the shield was grounded and intact. With a TDR, he sees an impedance...
  4. Bisonriver

    CST simulation - Transmission Line Problem

    It's not for school. We are out of maintenance and don't have funds to renew the service contract this year. I'm new to this and the last guy retired. I've never used CST before, just don't know how to model a grounded shield. Googled, but no luck on it. Anyone can help? Or at least point...
  5. Bisonriver

    CST simulation - Transmission Line Problem

    Hi, I’m using CST2009 Microwave Studio to simulate transmission line characteristic impedance. The scenario is to have a pair of copper wires that are a distance above the earth ground plate. Additionally, I’d like to see the characteristic impedance of a shielded twist pair (STP) with the...

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