Difference between filters and matching network

Discussion in 'General Electronics Chat' started by yuvi1, Feb 17, 2014.

  1. yuvi1

    Thread Starter Member

    Feb 1, 2013
    hi guys

    If i look over a passive filter and look over a matching network , i see that they are very similar , they both made by coils and capacitors and they both look very similar in their structure .

    My question is , what is the thing that make the difference ?, if i make a matching network , is it also have a filter effect on the signal that passes threw ?

    by the way - i know what filters are and what matching network are .
    thanks !
    Last edited: Feb 17, 2014
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    I think if you knew what filters are you won't ask. Eh!

    Still the difference lies in how they are wired The inductors and capacitors. They may look similar

    Filters filter certain frequencies.
    Matching does what it says. Match the Impedance two circuits like an Output Z matched to the input Z of two circuits
  3. LvW

    Active Member

    Jun 13, 2013
    Yes - of, course, such a matching network has a kind of filtering effect.
    However, it is not this filter effect that is wanted but the matching properties (i.e. input/output impedances).
    That means: The difference between both is in the envisaged effect only (which determines the design) - filtering or matching.
  4. yuvi1

    Thread Starter Member

    Feb 1, 2013
    first of all, thanks for your help !

    this is an example that i took from iphone 5 schematics , and i see that after the WLAN antenna connector there's a coil , capacitor and a resistor .
    how can i know if this is a filter or a impedance matching circuit ?
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