What are the important factors for the antenna integration?

If integrated antennas are required in a device, a few design aspects must be taken into account.
The enclosure should not be made of conductive material that will prevent the radio waves from penetrating it sufficiently. Moreover, each housing has an influence on the antenna characteristic, which can have a massive effect on the range of the radio signal. An adaption of an integrated antenna to the specific installation conditions is beneficial for the entire system’s performance.

In general terms, an antenna should have enough space to radiate the electromagnetic field, depending on the frequency used. Impedance matching is recommended to achieve a good ratio between radiated and reflected power.