Good Day To All,
We recently fabricated a surface microstrip flex circuit with 50 ohm +/- 2.5 ohms (results were good). The impedance traces were not covered with solder mask or coverlay but were plated with ENIG. The next part is where I need the help. The circuit runs at 20-26 Ghz. Customer says the return losses from the S-parameters measurements are good but the insertion losses are not (quite frankly I have no idea what this means) . Could the nickel plating be causing this issue?
Thanks.
Steve Kelly

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------