User's Manual

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8
8. Accessories
1)Antenna
antenna is very important for RF communication, its performance will affect the communication
directly. Module needs antenna in 50ohm. Common antenna has rubber straight/ elbow/ foldable rod
and sucker antenna and etc. Users can order accordingly. To ensure module in the best performance,
we suggest to use the our antenna
★To ensure modules get the best performance, user must obey the following principles when using the
antennas：
 Put the antenna away from the ground and obstacles as possible as you could；
 If you choose the sucker antenna, pull straight the lead wire as possible as it can be, the sucker under arches
should be attached on the metal object.