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Agilent Technologies Applications Engineer Interview Question

I interviewed in Richardson, TX and was asked:
"What is a "matching network" really trying to match?"
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Part of a Applications Engineer Interview Review - one of 119 Agilent Technologies Interview Reviews

Answers & Comments

of 1
Impedance to provide for maximum transmission of power.
- Interview Candidate on Feb 3, 2010
of 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
of 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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