Antenna Height; About The Fresnel Zone - Radwin 5000 HPMP User Manual

Antenna Height

Antenna Height
The recommended antenna height required for line of sight is calculated as the sum the Fres-
nel zone height and the boresight height. See
notation of Figure 18-1
height d
at distance
300
---------------------------------- -
frequency

GHz
0.6 ---------------------------------------------------------- -
d +
1
For the most conservative setting, we take the mid-point between the antennas, setting
ExpectedRange
---------------------------------------- -
d = d =
1 2
---------------------------------- -
frequency

which gives
0.6 -------------------------------------------------------------------------------------------
ExpectedRange
---------------------------------------- -

simplifying to
0.52
boresight clearance height
The
where
R = 6367.4425Km
Mean

About the Fresnel Zone

The Fresnel zone (pronounced "frA-nel", with a silent "s") is an elliptically shaped conical zone
of electromagnetic energy that propagates from the transmitting antenna to the receiving
antenna. It is always widest in the middle of the path between the two antennas.
RADWIN 5000 HPMP User Manual
below, splitting
from the left hand antenna, is given by
1
 
d d
1 2
d
2
2
300 ExpectedRange

---------------------------------------- -
GHz
ExpectedRange
---------------------------------------- -
+
2
ExpectedRange
.
---------------------------------------- -
frequency
GHz
is calculated as:
.
Release 3.2.00
About the Fresnel Zone
ExpectedRange
into
2
2
2
2
R +
Mean
Chapter 18
below. Using the
d + d Fresnel zone
, the
1 2
ExpectedRange
---------------------------------------- -
2
2
– R
Mean
18-3