2. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
3. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
4. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
5. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
6. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
7. This slide shows a simplified approach to using the Fresnel Zone. The
formula is a suggestion from Cisco Systems to make sure that no obstruction
occurs in the 1st
Fresnel Zone’s 60 % of diameter surrounding the LOS path.
This area is represented by the ellipsoid that is gray-green. The lighter green
area is the encloses the 1st
Fresnel Zone. No obstacle should intrude on this
60% zone so that a dependable link can be made between end units. To
compute the diameter in feet of this 60% zone use the equation in the slide,
where the D’s represent the LOS distance in mile and the f is the frequency of
interest in GHz. For example using a frequency of 2.4 GHz and D1 = D2 = 2
miles: 1st
Fresnel Zone Diameter = 46.5 ft. Finally multiple this Diameter by
60%. Obstruction Diameter = 0.6 x 46.5 ft. = 27.9 ft. Once this is plotted to
scale on the drawing it can be seen that the water tower is not in this 60%
area.
