- #1
spid3rx
- 15
- 0
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.
thanks.
spid3rx
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.
thanks.
spid3rx