1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I High frequency behaviour of copper

  1. Mar 24, 2016 #1
    Will copper behave as a dielectric in high frequencies???.....I tried to answer the question with loss tangent but relative permittivity of copper posed a problem....everyone on internet opines differently about relative permittivity of metals......then I looked at skin depth which decreases with frequency.....but with appreciable high frequency also....skin depth is not zero....please through some light !!
  2. jcsd
  3. Mar 24, 2016 #2


    User Avatar
    Science Advisor
    Gold Member

    what is your definition of high frequencies ?
    copper still works well at least to 100 GHz

  4. Mar 24, 2016 #3
  5. Mar 25, 2016 #4
    @Khashishi wikipedia link does not mention that it works as dielectric........@davenn i am talking about highest frequency used for communication purposes
  6. Mar 25, 2016 #5


    User Avatar
    Science Advisor
    Gold Member

    tho there is stuff above 40 GHz .... 38GHz is pretty common for microwave links between cell towers etc

    there's no problems using copper PCB tracks at these frequencies, waveguide is always used to get the signal to and from the antennas

    most commercial stuff above 40 GHz is vehicular crash avoidance radar etc
  7. Mar 25, 2016 #6
    thanks...and would you please say something about relative permittivity of metals ? .....or at least tell me some reliable sources to read.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Discussions: High frequency behaviour of copper
  1. High frequency (Replies: 13)

  2. Uber High Frequency (Replies: 4)