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2.45GHz RF microstrip Transmission Line design

  1. Jun 30, 2010 #1
    Hello all,

    I'm now working on the 2.45GHz frequency transmission line layout on the PCB.
    I would like to know whether there is a design guideline for the

    1) minimum length of the transmission line. how do I know or calculate? I can calculate the width of the TL to get the 50ohm impedance based on which layer for the ground plane, but length? how?

    2) the PCB is 8 layer type, is there a good rule to have for the TL ground to be on which layer? can I calculate the TL width on layer 2 ground and layer 4 ground ? mixture of both, and the TL width will be different.

  2. jcsd
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