As it has a Surface Mount value, it can be used for general RF Antennas.This is a Antenna RF from the ACAR series.Tape & Reel (TR) is the solid enclosure in which RF modulator is packaged.
ACAR0301-SW2 Features
With Surface Mount ACAR series
ACAR0301-SW2 Applications
There are a lot of Abracon LLC ACAR0301-SW2 RF Antennas applications.