Antenna Height; About The Fresnel Zone - Radwin WinLink 1000 Series User Manual

Antenna Height

Availability
= 1 6
×
10
Antenna Height
The recommended antenna height required for line of sight is calculated as
the sum the Fresnel zone height and the boresight height. See
Fresnel Zone
ExpectedRange
the left hand antenna, is given by
×
0.6
For the most conservative setting, we take the mid-point between the
antennas, setting
which gives
simplifying to
boresight clearance height
The
as:
R
where

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.
WinLink™ 1000 User Manual
7 –
× × ×
– 10 Cfactor
– ExpectedFadeM arg in
------------------------------------------------------------
10
below. Using the notation of
d + d
into , the
1 2
300
---------------------------------- - × ×
d
1
frequency
GHz
---------------------------------------------------------- -
d + d
1 2
d = d
1 2
300
---------------------------------- -
frequency
×
0.6 ------------------------------------------------------------------------------------------- -
ExpectedRange
---------------------------------------- -
ExpectedRange
×
0.52 ---------------------------------------- -
frequency
ExpectedRange
2
---------------------------------------- -
+
Mean
2
R = 6367.4425Km
Mean
Release 1.9
× (
frequency RequiredRange
GHz
Figure B-1
Fresnel zone height
d
2
ExpectedRange
---------------------------------------- -
=
2
ExpectedRange
× ---------------------------------------- -
2
GHz
ExpectedRange
---------------------------------------- -
+
2 2
.
GHz
is calculated
2
– R
Mean
.
Appendix B
3
)
KM
About the
below, splitting
d
at distance from
1
2
B-3