My memory is somewhat vague on this subject, but if I remember my classes correctly an antenna of 1/4th of the wavelength would be optimal for RF transmitters such as the Flex unit.
My units came shipped with an ~82mm antenna, which corresponds nicely with 1/4th the wavelength of 913MHz. However, as I operate on the European 868.3MHz, I was wondering if it would be worthwhile changing to an 86mm antenna.
Does anybody have experience with the effect of better matching the antenna length with the frequency used? Would the effect of such a small change in length be too insignificant to notice, or could it make a real difference?
Thanks in advance!