For best performance, please use the antenna that came with your module, or the COBRA DISH antenna. While using an antenna from another manufacture is not recommended, If you would like to use a different antenna, make sure the antenna is tuned to 2.4 GHz and is tested with the system in order to obtain the desired signal strength.
Can I Use a Different Antenna Than the Standard Antenna Provided by COBRA for the 18M?
Zach Gilbert
Documentation Team