RFID-UHF-Antennas
14
7 Installation / Attachment
To achieve the maximum range with the antenna, there must not be any interfering
objects between the antenna and the tag to be read� The function of the antenna is
affected by the type of fixing and the surrounding materials� For optimum antenna
behaviour there should not be any conducting objects in the vicinity of the antenna�
The following dimensions are given as adequate distances:
The distance to large metal surfaces and to the ground should be at least 70 cm
(see Figure 1)�
If it is not possible to avoid mounting in front of a metallic surface, a mounting
support can be used that establishes a distance of exactly 12 cm between the rear
wall of the antenna and the metal surface (see Figure 2)�
In case of direct mounting on a metallic surface (e� g� a plate as part of a mount-
ing support), the metal plate should be square and have dimensions that do not
exceed 16 x 16 cm (see Figure 3)�
Other objects such as, e�g�, containers with liquids in the immediate vicinity affect
the functionality of the antenna�
If these recommended distances cannot be met due to the local situation, the
antenna characteristics will change such that it will be necessary to re-assess the
antenna in this special installation situation�
1
2
Minimum spacing on all sides: 70 cm
3
