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Interview Question

Applications Engineer Interview Richardson, TX

What is a "matching network" really trying to match?

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technical
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Interview Answer

3 Answers

1

Impedance to provide for maximum transmission of power.

Interview Candidate on Feb 3, 2010
2

It is trying to match both the real and reactive source or load impedance to the system Zo, usually. Doing so provides maximum gain, and in a purely linear system maximum power transfer

Matching networks may also be quite commonly used to match the system Zo (say 50 Ohms) to the load line of a non-linear device such as a power amplifier, or just as similarly to match tot he optimum noise impedance of an LNA. In these cases a perfect match is not desired, as maximum gain is not the goal, but rather maximum efficiency or lowest noise figure.

Burnout on Feb 15, 2010
0

You want the real parts to match and the reactive components to cancel if you want max power transfer

RF guy on Apr 9, 2013

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