If you float either or both N connectors from the shielded enclosure, you largely
defeat the purpose of the enclosure.
My advice? Bond both connectors firmly to the enclosure, and run coax cable
within the enclosure from each N connectors to its existing SMA connector on
the nano. Then test to see how it works out. If unhappy, try putting ferrite "beads"
on both coax lines.
One problem area I see relates to the USB cable. That, too, should be treated
in a similar manner, and a shielded USB cable should be used between the
enclosure and the external computer. And don't spare the ferrite beads on that,
either, both inside and outside the enclosure. The trick might lie in finding a
USB bulkhead thru connector that can be bonded to the enclosure and which
effectively bonds the shield of at least the external cable (but preferably both)
to the enclosure wall.
Dana K8YUM
