The Surface Mount value makes it suitable for general RF Antennas.From the OnBoard™ series, it's a Antenna RF.A solid enclosure of Cut Tape (CT) surrounds RF modulator.
PRO-OB-518 Features
With Surface Mount OnBoard™ series
PRO-OB-518 Applications
There are a lot of Proant AB PRO-OB-518 RF Antennas applications.