which is better-electrical tilt or mechanical tilt ?

[coursekec]

I am new to the RF world..can anyone explain me the difference between electrical tilt and mechanical tilt and it's advantages and disadvantages ? which is better if both options are available ?

[EJAY]

Hi,
For young professionals you can read this simple handouts.
handouts attached for your reference.
No password.
just dont forget reps

Regards,
Ejay

[pvbabu79]

hi

to my know ledge , electrical tilt is better than mechanical tilt

[EJAY]

hi

to my know ledge , electrical tilt is better than mechanical tilt

no not really. it depends on the scenario!!!

[striker]

no not really. it depends on the scenario!!!

i agree with you it's based on scenario..

[banisha]

Depends of the situation, you can use even both!

[adnansid]

I am new to the RF world..can anyone explain me the difference between electrical tilt and mechanical tilt and it's advantages and disadvantages ? which is better if both options are available ?

Mechanical Tilt:
Advantage: Decrease coverage and Does not add Interference as in case of Electrical tilts.
Dis advantage: Sector overlaps are increased.
Recommeded for sites which are very high.

Electrical Tilt:
Advantage: Decrease coverage and does not increase overlap in sectors.
Dis advantage: Increases interference, as portion of energy based on electrical tilts is trasmitted in the upper side lobe reducing the energy in lobe facing towards ground hence reducing coverage.

Recommeded for sites which are not very high.

[onlygod]

Mechanical tilt will decrease coverage lengthwise from the sector, but in width, the coverage will stay the same.

Whereas electrical tilt decreases both length and width, like a circle on the ground which is getting smaller and smaller, but stays a circle. Whereas mechanical tilt results in elipse shape type coverage on the ground.

Mechanical tilt is used on tall sites, typically on top of hills, because electrical tilt is not enough.

Don't forget that mechanical tilt will lift up the backlobe of the antenna, so go easy with mechanical tilt.

Typically, in a city with a tall site, we might use 2 or 4 degree mechanical tilt with probably 4 or more degrees electrical tilt.

[firstmaxim]

Electrical tilt is better for small amount of tilting, since it helps maintain pattern integrity and also curtail the backlobe. Mechanical tilting on the other hand has a larger range, but can induce beam splitting.

Regards.

[Al_G9]

Hi:
Also M-Tilt increase the back loop which making interference in the back direction , we already using electrical at first then mechanical to reduce the cell coverage.