Jeff McGlaughlin wrote:
> --Help!-- I am working on a design for an active antenna
> mounted external to jet aircraft. I am concerned about the
> CTE mismatch between ceramic and plastic components
> (including 2 16-pin SOICs)  and  FR-4 laminate. Can anyone
> suggest materials/vendors for this type of application?

WOW! Sounds like its going to be severe thermal cycling.
You are likely faced with some significant shock and
vibration issues, too!
I hate to sound "low tech", but can you go back to using
through-hole components?

Sorry I can't be more helpful,                      Jack