ARQuattr
Member level 2
When typical trace impedance is specified at 50 Ohm or 100 Ohm for example, what is the actual complex impedance? Does it matter? I assume for PCB traces like a microstrip it would be mainly capacitive?
I'm also a little confused why frequency never seems to be factored into the calculations. Isn't the relative permittivity a function of frequency? Would the geometry be the same for 2.4GHz as it would for 100MHz?
I look at a stripline or microstrip as mainly a capacitor, which should have an impedance inversely proportional to the frequency. But wherever I look, frequency doesn't seem to be considered in the calculations, so clearly I'm missing something.
Thanks
I'm also a little confused why frequency never seems to be factored into the calculations. Isn't the relative permittivity a function of frequency? Would the geometry be the same for 2.4GHz as it would for 100MHz?
I look at a stripline or microstrip as mainly a capacitor, which should have an impedance inversely proportional to the frequency. But wherever I look, frequency doesn't seem to be considered in the calculations, so clearly I'm missing something.
Thanks