Types Of Antenna And Properties; Antenna Parameters - Siemens SIMATIC RF600 System Manual

Procedure for configuration of existing third-party components
If you already have third-party components which you wish to integrate into the SIMATIC
RF600 system, proceed as follows:
1. Depending on the third-party component, refer either to Section "Antennas" or Section
2. Compare the limits with the data of your antenna or cable vendor.
3. Subsequently proceed exactly as described above in "Procedure for selecting third-party
6.2.4 Antennas
6.2.4.1

Types of antenna and properties

Basically all types of directional antennas can be considered as third-party antennas for
integration into the SIMATIC RF600 system. Directional antennas have a preferred direction
in which more energy is radiated than in other directions.
6.2.4.2

Antenna parameters

Overview
The properties of an antenna are determined by a large number of parameters. You must be
aware of these properties in order to make the correct selection for your appropriate UHF
antenna. The most important parameters are described below. These important parameters
are described in detail in the following sections. The following parameters describe both the
send and receive functions of the antenna (reciprocity). The antenna is a passive antenna. A
two-way relationship exists.
● Radiated power
● Antenna gain
● Impedance
● Return loss / VSWR
● Power rating
● Polarization
● Front-to-back ratio
● Beam width
SIMATIC RF600
System Manual, 10/2009, J31069-D0171-U001-A8-7618
"Antenna cables" for the important criteria of your components. The parameters are
sorted in descending relevance.
components" from Paragraph 3. onwards.
6.2 Guidelines for selecting RFID UHF antennas
Antennas
153