User's Manual

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]
5-7
5.4 Antenna assembly
5 Installation
5.4Antenna assembly5400Antenna assembly5-
As with all radio signals, the InduraNET p signals will mainly propagate
in the first Fresnel zone. The Fresnel zone is a spheroid, in whose focus
the antennas are located.
Schematic representation:
The size of the Fresnel zone depends on the wavelength of the radio sig-
nal and the distance of the antennas.
At 2.4 GHz, approximate values for the Fresnel zone's radius R in rela-
tion to antenna distance d:
d [m]5 8 121620305075100
R [m] 0,4 0,5 0,6 0,7 0,8 0,9 1,3 1,5 1,8
d
R