- This topic has 19 replies, 1 voice, and was last updated 13 years, 6 months ago by mahesh kolte.
5th March 2007 at 05:30 #46781sourabh khatriGuest
can anybody tell me on which factors our antenna height in a microwave links depends on… an how could we calculate a antenna height..?
Plz tell me the answer on firstname.lastname@example.org May 2007 at 11:44 #46782RafiGuest
Line of sight is the most important factor which depends upon many factors like surrounding area(open/suburban/urban/roads.31st May 2007 at 15:17 #46783grahamGuest
all depends on height of mast if its not high enough does not matter about minimum dish height.31st May 2007 at 16:02 #46784yashGuest
which antenna has a high coverage area (900,1800) &through what relation?31st May 2007 at 16:49 #46785PixGuest
It is not about the antenna, but rather the frequency band of the antenna ! You can find the formula here :
relation : Free space loss
you’ll see that 900MHz provides twice more rx power at the same distance (twice the power = +3dB).
Furthermore, 900MHz tends to get less attenuation from obstacles (such as buildings, windows, trees, etc.), so it covers further away.
relation : Okumura Hata, Radio propagation, etc…1st June 2007 at 05:16 #46786TufailGuest
Antenna height of Microwave antenna depends upon the path profile of the link.
you need to calc all hi building, tree, any obstacle ht with ther coordinates under da LOS. and after that used some pathloss input ur frequency and all obstable ht n ther AMSl.
da software will cal da antenna ht.
Tufail2nd June 2007 at 17:59 #46787yashGuest
what is the purpose of surgearester in BTS21st June 2007 at 10:49 #46788Navdeep SinghGuest
please consider the AMSL above mean sea level for calculation of hieght of the antenna at each location.that will be accurate formula to calculate the hieght of the microwave site.9th August 2007 at 07:23 #46789Imran SabirGuest
The antennas centre line calculation is done on the basis of three things.
1)AMSL of the critical point between the two sites
2)K factor you chose for the link
3)Fresnel zone clearance
When you add all these three criterias it will give you the optimized height of your microwave antenna.11th August 2007 at 08:58 #46790Sachin DangeGuest
What should be the distance of the BTS from a Petrol Storage Tank.15th August 2007 at 16:16 #46791Robert EspirituGuest
can anybody tell me on which factors our antenna height in a microwave links depends on… and how could we calculate a antenna height..?16th August 2007 at 05:59 #46792koushGuest
Less freq >> Less attenuation
More freq >> More attenuation
Small freq >> high B point
High freq >> Low B point
Also you relation on fresnel-zone & propagation slope.21st August 2007 at 08:20 #46793jacobGuest
if you referring for mwave installation is one for LOS first and designed. like the one said its the frequency,fresnel and what
the climatic factor and types of mwave u will install4th September 2007 at 06:55 #46794sharjeelGuest
hiiiiiiiiiii to all…
kindly can you tell me that what is meant by fresenl’s zone… in detail…
with regards4th September 2007 at 08:57 #46795pixGuest
you will find plenty of information on google :
for instance :
“To maximize receiver strength, one needs to minimize the effect of the out of phase signals by removing obstacles from the RF Line of Sight (RF LoS). The strongest signals are on the direct line between transmitter and receiver and always lie in the 1st Fresnel Zone.”