You can use this antenna with your 868MHz RF modules. It has an SMA-male connector.
Technical Specifications:
- Frequency Range : 868 MHz
- Polarization : Linear
- Gain : 2.14dBi
- V.S.W.R : <2.5
- Impendance : 50Ω
- Connector : SMA Male
- Operating Temperature : -40℃~+85℃
- Vibration : 10 to 55Hz with 1.5mm amplitude 2hours
- Environmentally Friendly : ROHS Compliant