Impedance Matching 101 ~ 07/24/2024

Speaker/Presenter: Ward Silver, N0AX
Documents (including slideshow): www.dropbox.co...
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[@BusDriverRFI]

Absolutely no one ever says anything about the dimensions of the topic of balanced or unbalanced components. Besides the fact that we see the circuit schematic of the transmitter described as a 0 ohm impedance source in series with a source impedance, then that is loaded into an antenna and then there's a return line back to the transmitter. So after doing a mesh analysis on the transmitter impedance, the rest is pretty simple. The antenna is a load that is actually a resistance in series with an inductance in series with a capacitance. When the XL and the Xc are equivalent, they cancel leaving only the resistance. So what do we balance? The Kirchoff current law states that current flowing into a point (node) is equal to the current flowing out of that point. Now instantaneously we can look at that circuit and know that the current flow is not equal everywhere all at once, but on average, the current around the circuit loop will be equal. If we have 2amps flowing into the load, we have 2amps flowing out of the load. Kirchoffs current law. Again, we see you doing math showing impedance transformations and a lecture about common mode current but there's never any values associated with the topic. I think it's pretty obvious why.

[@tahirsongelen7781]

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