The lengths normaly used for antennas are 1/4 the wavelength or 8.6cm for 868Mhz, although in practice maybe up to 1cm shorter.
So why your using 5cm or 10.8cm I cannot understand.
When you say a ‘few meter’ what does that actually mean ?
The lengths normaly used for antennas are 1/4 the wavelength or 8.6cm for 868Mhz, although in practice maybe up to 1cm shorter.
So why your using 5cm or 10.8cm I cannot understand.
When you say a ‘few meter’ what does that actually mean ?