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As an alternative to doing the math, as detailed in Andy's answer, you can use a graphical aid called a Smith chart: These were used routinely before computers to match transmitters to antennas. ...
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#2: Post edited
As an alternative to doing the math, as detailed in Andy's answer, you can use a graphical aid called a <i>Smith chart</i>:These were used routinely before computers to match transmitters to antennas. The math behind them is what Andy described. See the <a href="https://en.wikipedia.org/wiki/Smith_chart">Wikipedia page</a> for details, which is where the image above was copied from.
- As an alternative to doing the math, as detailed in Andy's answer, you can use a graphical aid called a Smith chart:
- 
- These were used routinely before computers to match transmitters to antennas. The math behind them is what Andy described. See the <a href="https://en.wikipedia.org/wiki/Smith_chart">Wikipedia page</a> for details, which is where the image above was copied from.
#1: Initial revision
As an alternative to doing the math, as detailed in Andy's answer, you can use a graphical aid called a <i>Smith chart</i>:  These were used routinely before computers to match transmitters to antennas. The math behind them is what Andy described. See the <a href="https://en.wikipedia.org/wiki/Smith_chart">Wikipedia page</a> for details, which is where the image above was copied from.