[TowerTalk] Antennex: Antenna Arrays Vol 1 Released

[K7LXC at aol.com]

Howdy, TowerTalkians --
 
    FYI.
 
Cheers,
Steve    K7LXC
 
>  Antenna Arrays - Volume 1 just  released!  
You can add this 344-page comprehensive book  about antenna arrays now 
either on CD or fast via download. 
Antenna arrays are able to produce radiation  patterns that combined, have 
characteristics that a single antenna would  not. 
An antenna array is a group of radiators  whose currents are of different 
amplitudes and phases. They use electro-magnetic  wave interference phenomena 
to enhance the radiation signal in the desired  direction and diminish it 
in the non-desired direction. Antenna arrays are the  solution to the problem 
defined as the limitations of operating a single  antenna. An example of 
the problem! is that although a dipole antenna allows for  better control of 
direction than an isotropic (omni-directional) antenna — as  the length of 
the dipole increases, the control of direction decreases. Hence  control by 
changing the length of a single antenna is very limited. Greater  flexibility 
and control can be obtained for directing the beam with an  arrangement of 
multiple radiators. 
To learn more about the details and how to  order, please visit this web 
page: 
http://www.antennex.com/Sshack/arrays/arrays.htm 
To see many other books available, please go  to the main menu for books: 
http://www.antennex.com/Sshack/books.htm