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# How to calculate anteena height….???

Viewing 15 posts - 1 through 15 (of 20 total)
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• #46781
sourabh khatri
Guest

Hi

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 write2khatri@yahoo.com

#46782
Rafi
Guest

Line of sight is the most important factor which depends upon many factors like surrounding area(open/suburban/urban/roads.

#46783
graham
Guest

all depends on height of mast if its not high enough does not matter about minimum dish height.

#46784
yash
Guest

which antenna has a high coverage area (900,1800) &through what relation?

#46785
Pix
Guest

Hi Yash,

It is not about the antenna, but rather the frequency band of the antenna ! You can find the formula here :
en.wikipedia.org/wiki/Free-space_loss
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.
en.wikipedia.org/wiki/Hata_Model_for_Urban_Areas
relation : Okumura Hata, Radio propagation, etc…

#46786
Tufail
Guest

Hi All,

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.

rgds
Tufail

#46787
yash
Guest

THANKS

what is the purpose of surgearester in BTS

#46788
Navdeep Singh
Guest

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.

#46789
Imran Sabir
Guest

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.

#46790
Sachin Dange
Guest

What should be the distance of the BTS from a Petrol Storage Tank.

#46791
Robert Espiritu
Guest

Hi

can anybody tell me on which factors our antenna height in a microwave links depends on… and how could we calculate a antenna height..?

#46792
koush
Guest

Attenuation:
Less freq >> Less attenuation
More freq >> More attenuation

Break point:
Small freq >> high B point
High freq >> Low B point
B.point= h1*h2/lampda

Also you relation on fresnel-zone & propagation slope.

#46793
jacob
Guest

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 install

#46794
sharjeel
Guest

hiiiiiiiiiii to all…
kindly can you tell me that what is meant by fresenl’s zone… in detail…
thanx
with regards

#46795
pix
Guest

hellooooo 🙂

you will find plenty of information on google :
for instance :
en.wikipedia.org/wiki/Fresnel_zone

“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.”

Viewing 15 posts - 1 through 15 (of 20 total)
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