Hakim,
Forget SMA; they're too bulky for most PCB applications discussed here. In
the past, I had a similar concern and used mini-SMP from Rosenberger (but
there are other sources, too) Those tiny connectors are good for up to
65GHz and won't take up much space on a PCB. Still, you'll need to flare up
diff. traces where they need to be routed to the connectors.
Since your VNA probe connectors are usually of SMA type you'll also need at
least a pair of SMA-miniSMP adapters which are quite expensive.
Regards.
Ihsan Erdin
On Tue, Oct 11, 2016 at 7:25 AM, Hakim Sellaoui <
hakim.sellaoui@xxxxxxxxxxxxxxx> wrote:
Hi all,
I'm designing a test board that will have differential trace widths of 4
mil and I want to connect SMA connectors to them, but I'm not sure what
connector would be suitable as the ones I've found have connector widths
that are neither equal to or smaller than the trace widths, as well as the
recommended pad sizes are much larger. For an RF design I did at Uni, I
just added a quarter wave transformer to provide the matching at the
operating frequency; is it still possible to do this with a high-speed
design with a 200 ps rise time (5 GHz) signal?
Or can anyone recommended a way to connect VNA coaxial cables to a PCB
with trace widths around 4 mils, such that the Zo is maintained.
Thanks,
--
Hakim Sellaoui
Associate Hardware Engineer
DisplayLink (UK) Limited
Tel: +44 (0)1223 443920
Fax: +44 (0)1223 443921
E: hakim.sellaoui@xxxxxxxxxxxxxxx<mailto:hakim.sellaoui@xxxxxxxxxxxxxxx>
W: http://www.displaylink.com/
140 Science Park, Milton Road,
Cambridge, CB4 0GF,
United Kingdom.
Registered in England No. 04811048
DisplayLink Corp.
A US incorporated company.
480 S. California Avenue Ste 305, Palo Alto, CA 94306, USA.
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