### How tall must the antennas be if the link operates

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##### Reference no: EM13187614

How tall must the antennas be if the link operates on a frequency of 1450Mhz, D1=7miles, D2=11miles, and the obstruction is 85 feet high?

Practice Problem                              Fresnel Zone Clearance

How tall must the antennas be if the link operates on a frequency of 2.450Ghz, D1=5miles, D2=11miles, and the obstruction is 60 feet high?

SOLUTION ALREADY PROVIDED FOR ALL OF THESE BELOW. JUST REWRITE IN OWN WORDS.

1. How tall must the antennas be if the link operates on a frequency of 900Mhz and the total distance is 12 miles?  Heights are in feet above sea level and distance is in miles.  HAASLHA = 550 feet, HAASLHB = 545 feet, HAASLOBS-4.5mi = 545 feet, HAASLOBS-9mi = 545 feet.

2. What is the minimum height of Ha if Hb has to be mounted 60' above the calculated level?

1. How tall must the antennas be if the link operates on a frequency of 2.450Ghz and the total distance is 18 miles?  Assume a 60' obstruction at each point of concern.  Heights are in feet above sea level and distance is in miles.  HAASLHA = 460', HAASLHB = 455', HAASLOBS-6mi = 480', HAASLOBS-10mi = 480'.

Obstruction at 6 miles                                                                            Obstruction at 10 miles

2. How much must HB increase if HA is limited to 2/3 of the equal tower height solution?

3. How must Ha and HB change to adjust for the terrain HAASL?

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