Overview
The 3977D is an antenna made by PCTEL with 5 pins.
JLCPCB lists it (part C6387133).
Symbol
The library has no symbol for this part yet.
Footprint
The library has no footprint for this part yet.
Questions
Where is the 3977D datasheet?
PCTEL publishes it: the Datasheet link on this page opens it.
Where can I order the 3977D?
JLCPCB lists it as part C6387133, with 0 in stock; the sellers' links on this page open their listings.