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sensing.honeywell.com
Installation and Technical Manual for the
Limitless™ Multi-Protocol Receiver, WMPR Series
ISSUE B
32309669
m
WARNING
If a person comes in contact with electrical power, and
cannot move
DO NOT TOUCH THAT PERSON OR RISK
ELECTROCUTION.
•
Use a non-conductive dry board, stick, or rope to push,
pull, or drag them so they no longer are in contact with
electrical power.
•
Once they are no longer contacting electrical power,
administer CPR if certified, and make sure emergency
medical aid has been requested.
8.2 | Antenna Designs and Considerations
8.2.1 Omni-directional Antenna Design
The Limitless™ Series omni-directional antennas were cho-
sen for their ability to be used in applications where trans-
mit-and-receiver antennas may be moving with respect to each
other or could be stationary. These monopole and dipole anten-
nas radiate power (power from the internal radio of the WMPR
monitor) in a 360° outward pattern in a plane perpendicular to
the length of the antenna element. The term “omni” may sug-
gest that the antenna radiates power in all directions, but that
is not the case. The actual antenna radiation pattern looks more
like a toroid (doughnut-shape) as shown in Figure 45.
Figure 45. Radiation Pattern of an Omni-directional Antenna
Toroid Radiation Pattern - Pat-
tern is 360 degrees in the vertical
plane, but not the horizontal plane
2.0 dBi RF Antenna Pattern - Hor-
izontal
2.0 dBi RF Antenna Pattern - Ver-
tical
The antenna radiates virtually zero power in the Z axis and most of the power in the X and Y axis. Increasing the antenna’s gain will
increase the power only in the X and Y axis. As a result, the radiation pattern becomes narrower. For instance, this is analogous
to the reflector in an automobile’s headlight. The reflector does not add light or increase the luminous intensity of the light bulb,
rather it simply directs all the light energy in the forward direction where the light is needed most.