[ANT] I have an existing 2.4GHz design. Now I want to change to an 868 MHz solution. Can I reuse the antenna? No, the antenna made for 2.4 GHz will perform very bad at 868 MHz Last Update: August 8, 2017 January 11, 2017 2011 Antenna Q&A Related Knowledge Base Posts -[ANT]”Is a flexible antenna (a wire) simply soldered close to the RF-Plane sufficient aa antenna – or a perpendicular soldered stiff wire with quarter wavelength over a ground plane leads to the best result?[ANT] Can I use a PCB antenna on 169 MHz?[ANT] We are making device based on your module. We need advice regarding antenna, because we’d like to use best possible antenna. Does it make sense to use long antenna, f.e full wave antenna. What would be theoretical gain comparing to half-wave antenna?