I have accumulated a large amount of R/C gear over the years. I have several antennas which are not labelled as to their original use. This antenna is either for 5.8ghz, 2.4ghz, or 910mhz.
The connector is SMA with a male pin, threaded on the inside, and the markings on the mat are in mm.
Is there a way to tell what frequency it is designed for by looking at it? I tried calculating wavelengths, and the antenna is shorter than the wavelength of these three frequencies.
I would also like to know if there is a general solution to this problem...