While the telecommunication signal is easily transmitted outside, due to brick walls, metal parts etc. it is almost impossible to receive good signals inside buildings. Therefore, antennas provide the connection between devices and network. Indoor antennas require not only electrical performance that guarantees a good connection and signal transmit and receive with devices but also maintain a low visual impact to general public.
The 1-port versions (SISO operation), 2-port version (MIMO operation) and 4-port versions as directional antenna or omni-directional antenna are available. The indoor antennas have an extended frequency of up to 6 GHz for use in 5-G networks.