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    ENIG quiery for 10GHz Application

    Dear all,

    I have designed a filter with a hairpin pass band from 7.3 to 7.7 GHz,
    do i have to coat a ENIG layer for this application,
    Will there be any affetcs due to the conductivity issue of nickel or gold at the frequency mentioned above?
    can i use just a copper trace and skip the ENIG coating...?
    Kindly help me out ....!!!!

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    Re: ENIG quiery for 10GHz Application

    Quote Originally Posted by shashy.br View Post
    Dear all,

    I have designed a filter with a hairpin pass band from 7.3 to 7.7 GHz,
    do i have to coat a ENIG layer for this application,
    Will there be any affetcs due to the conductivity issue of nickel or gold at the frequency mentioned above?
    can i use just a copper trace and skip the ENIG coating...?
    Kindly help me out ....!!!!
    As a hairpin filter is a "low-Q" type, it can be gold or nickel plated without a significant effect. By a fine measurement you may detect some minor change but certainly within a fraction of a per cent.


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    Re: ENIG quiery for 10GHz Application

    Perhaps the plate material would not help too much, but was proved that the Q factor of the middle resonator sections (and spacing between them), has a greater role in determining the overall Q rather than outer resonator sections (and their spacing).
    For middle resonators, to increase their Q is preferable to use thinner lines (high impedance) and greater spacing.


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    Re: ENIG quiery for 10GHz Application

    I'm sure the ENIG plating will reduce the Qfactor. You could revert to silver plating which influences the Qfactor much less. And gold is even better.


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    Re: ENIG quiery for 10GHz Application

    Thanx for the replies......i am gonna go for silver plating and try with out any plating also ,
    will come back shortly with my finding



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    Re: ENIG quiery for 10GHz Application

    Then also take into account that the environmental protection is less than Ni. Ask the advise of your production expert.


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    Re: ENIG quiery for 10GHz Application

    Hi all,
    i have discussed with production expert in our organisation and decided to go for a 2 micron Electroless Gold plating.



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    Re: ENIG quiery for 10GHz Application

    2 micron gold plate will work and be thin enough to not perturb the fields much. Unfortunately, it is not thick enough to keep the copper from oxidizing over a longer period of time.


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