RF transformer and IF transformer

Discussion in 'General Electronics Chat' started by jasonhaykin, Apr 17, 2007.

  1. jasonhaykin

    Thread Starter Member

    Mar 8, 2007
    23
    0
    Hi guys,
    Please tell me about IF transformers and RF transformers.
    I just don't know anything about them. :confused:
    Thanks
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,145
    1,791
    They are transformers. They are characterized to work at higher frequencies than power transformers. They are used for coupling and impedance matching.
     
  3. recca02

    Senior Member

    Apr 2, 2007
    1,211
    0
    wiki describes rf transformer as

    "For radio frequency use, transformers are sometimes made from configurations of transmission line, sometimes bifilar or coaxial cable, wound around ferrite or other types of core. This style of transformer gives an extremely wide bandwidth but only a limited number of ratios (such as 1:9, 1:4 or 1:2) can be achieved with this technique.

    The core material increases the inductance dramatically, thereby raising its Q factor. The cores of such transformers help improve performance at the lower frequency end of the band. RF transformers sometimes used a third coil (called a tickler winding) to inject feedback into an earlier (detector) stage in antique regenerative radio receivers."
     
  4. Gadget

    Distinguished Member

    Jan 10, 2006
    613
    0
    And an IF transformer is just an RF transformer tuned to the IF frequency... ie 10.7 MHz, or 455KHz or whatever happens to be used.
     
  5. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    and i might add wide band rf trannys application are for matching impedance, voltage/current transformation, dc isolation, power splitting, signal inversion, likewise balance/unbalanced mixing.
    there's this custom wide band trannys that has special combination of impedance ratio, also frequency response, just to mention a few.

    you should also check the very informative tutorial in this site.

    moz:)
     
  6. jasonhaykin

    Thread Starter Member

    Mar 8, 2007
    23
    0
    Thanks guys.
     
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