Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Resonance in coupled circuit

  1. Aug 13, 2005 #1
    Dear Forum,

    My question is to the circuit drawing I have attached. (representing a simplified rfid system, with "Circuit 1 being the tranceiver antenna, "Load" being a transponder and "Circuit 2" represents an additional circuit between)
    For optimal performance the circuit should resonate at a given frequency. When calculating the needed capacitance in circuit 1, do I have to consider the mutual inductance between L1 and L2 ? (For now I assume the coupling factor between L3 and L4 is small compared to the coupling factor between L1 and L2.)

    [tex]Z_{1}=R+\frac{1}{j\omega C_{1}}+j\omega L_{1}-j\omega M[/tex]

    And that the needed capacitance is simply such that it cancels out the inductive reactance given by [tex]j\omega L_{1}[/tex] and [tex]jwM[/tex].
    Am I on the right track????
    If I am, I assume that the capacitor C2 must be found the same way?

    best regards

    Attached Files:

  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted

Similar Discussions: Resonance in coupled circuit