CHAPTER 2 - Conveying Power at Radio Frequency
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2.8.3 Matched Line
In this section we will show snapshots of what is happening in our transmission line at
different instants in time when the line is terminated with a matched load which, in this particular
case, is 50 Ω.
When the Line is matched, i.e. terminated with its characteristic impedance Z
0
which is also equal to
the internal impedance of the source, no reflections occur and we achieve max power transfer.
There is no standing wave since the instantaneous voltage on the line is equal to the incident voltage.
Maxima and minima are equal to those of the incident wave and move along the transmission line. A
constant envelope (shown by the dashed magenta line on the standing wave plot) would
therefore be observed on a slotted line. (video 3.3)
Conquer Radio Frequency
86 www.cadence.com/go/awr
