User's Manual

Table Of Contents
© 2001, AXCESS Inc. 750.001.004 R0033 55
Road Loop Antenna Installation
Introduction
The Road Loop Antenna is designed for vehicle applications. Road
Loop Antenna wire is available in lengths that will accommodate
roadways or gate entrances up to 36-feet in width. For antennas
wider than 36 feet, contact AXCESS Inc. Customer Support at 800-
577-6080.
The Figure 26 shows a simplified diagram representing the field
generated by a Road Loop Antenna. In reality, antenna fields are
lobed and asymmetrical, but the longest range will still be along the
longest sides. If you are installing a Road Loop Antenna in a multi-
level parking garage, keep in mind that the field extends up and down
from the Road Loop.
Antenna fields are affected by the type of pavement, amount of rebar,
and nearby power lines. For these reasons,
it is strongly
recommended that the Road Loop be laid out and tested before
it is permanently mounted
.
Figure 26 A Road Antenna transmit field.