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What is the difference between Electrical-tilt and Mechanical-tilt of an antenna?
sagitraz 03-February-2009 08:30:44 PM

Comments


For defining coverage area towards which the antenna would transmit radio waves we used to adjust Electrical Tilt of that antenna. Maximum and minimum limits of an antenna’s electrical tilts are mostly given in antenna specifications or in its manual. For example, for best performance, a Kathrein 739686 has electrical tilt range 0 to 7. Coverage range of an antenna is affected by its electrical tilt.
In the above diagram, suppose it is a Kathrein 739686 antenna deployed on 45meters tower propagating radio waves on 806 MHz to 960 MHz band, with vertical beam width of 65degrees. Now the covering area will change by changing the electrical tilt. Upper 3db point, lower 3db point, and the main beam range will be suffered be changing electrical tilt. A real table from practical experiment is given below:

Mechanical Tilt confirmation:

In some cases we use to change direction of an antenna mechanically, when ever need to point some area we changes antennas mechanical tilt accordingly. But in many cases we refer to set mechanical tilt to zero, because of interference caused by back loop of an antenna when its mechanical tilt is increased or decreased.
In site verification it is being verified that either mechanical tilt of an antenna is settled as is was planned or not. And snaps of mechanical scale of each antenna is taken as a proof

Posted by saqlain231


In general Electrical-tilt is a built in function of antenna and you adjust it through nobe
Posted by HamidAliKhan


Electrical-tilt is a built in function of antenna and you adjust it through nobe

Posted by crouse


electrical-tilt is a built in function of antenna and you adjust it through nobe

Posted by waqqas1


Electric TILT is use for the anteena power Adjustment for paticular area or planed area similarly Mechanical TILT is use for the coverage area specified in BSS budget or planed area.
Posted by crouse


electrical-tilt is a built in function of antenna and you adjust it through nobe

mechanical down tilt
when you changes its tilt through arms by increasing capacity.
normally tilts are 2 or 3
Posted by Hash007

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