The Connector Mount allows it to be used for RF Antennas in general.EXC is a series of Antenna RFs.Bulk solid enclosure protects the RF modulator.In most RF ic designs, it is qualified as a Chassis Mount.
EXC450SM Features
With Connector Mount EXC series
EXC450SM Applications
There are a lot of Laird Technologies IAS EXC450SM RF Antennas applications.