Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[SOLVED] ENIG quiery for 10GHz Application

Status
Not open for further replies.

shashy.br

Full Member level 2
Joined
Sep 15, 2011
Messages
130
Helped
6
Reputation
12
Reaction score
6
Trophy points
1,298
Location
India
Activity points
2,151
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 ....!!!!
 

jiripolivka

Advanced Member level 5
Joined
May 21, 2010
Messages
2,832
Helped
831
Reputation
1,660
Reaction score
802
Trophy points
1,393
Location
Santa Barbara
Activity points
22,012
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.
 

vfone

Advanced Member level 5
Joined
Oct 10, 2001
Messages
5,012
Helped
1,500
Reputation
3,000
Reaction score
1,104
Trophy points
1,393
Activity points
31,660
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.
 

radiohead

Advanced Member level 1
Joined
May 13, 2004
Messages
447
Helped
65
Reputation
126
Reaction score
28
Trophy points
1,308
Location
Heart of Europe
Activity points
3,561
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.
 

shashy.br

Full Member level 2
Joined
Sep 15, 2011
Messages
130
Helped
6
Reputation
12
Reaction score
6
Trophy points
1,298
Location
India
Activity points
2,151
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
 

radiohead

Advanced Member level 1
Joined
May 13, 2004
Messages
447
Helped
65
Reputation
126
Reaction score
28
Trophy points
1,308
Location
Heart of Europe
Activity points
3,561
Then also take into account that the environmental protection is less than Ni. Ask the advise of your production expert.
 

shashy.br

Full Member level 2
Joined
Sep 15, 2011
Messages
130
Helped
6
Reputation
12
Reaction score
6
Trophy points
1,298
Location
India
Activity points
2,151
Hi all,
i have discussed with production expert in our organisation and decided to go for a 2 micron Electroless Gold plating.
 

biff44

Advanced Member level 5
Joined
Dec 24, 2004
Messages
4,826
Helped
1,353
Reputation
2,702
Reaction score
1,031
Trophy points
1,393
Location
New England, USA
Activity points
36,448
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.
 
Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search


Welcome to EDABoard.com

Sponsor

Sponsor

Design Fast


×
Top