WirelessHART Fieldgate SWG70 Installation
Endress + Hauser 17
4.1.2 Antenna range
The antenna supplied is an omni-directional dipole antenna.
A schematic representation of the wave propagation is provided in the following graphic.
If the antenna is pointed upwards, the signal is emitted horizontally. The transmission and
reception quality decreases by up to 50% as of an angle of approx. 39°. Almost no signal will
be radiated directly above and below the antenna.
We therefore recommend that you mount the wireless devices on one plane where possible.
If you must mount the wireless devices on very different planes, we recommend you use a
remote antenna. See Chapter 4.2 "Mounting the antenna" on page 19. Different coverage is
achieved with a remote antenna. For the associated requirements, please see the Technical
Information for "WirelessHART Fieldgate SWG70" (TI00027S) on the CD-ROM provided.
Fig. 4-1: Wave propagation, schematic representation (alpha = approx. 39°)
1 No signal above and below 2 Stronger signal sideways
1
2
2
1
α
α
α
α
100%
100%
50%50%
50%50%
0%
0%
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