through bulding antenna... an array antenna to get a scaning beam probagation I need to change phase shift of transmetted signal to let the beam scan the area needed.. how can I do that... I need onlythe idea of how to design my transmitter. a block diagram or what ever...
thanks
ya! the problem is that i couldn't get a useful diagram or design to change the phase w/t changing the frequency!
When implementing scanning arrays you usually use several antenna elements (dipoles for example), and the beam direction is determined by the relative phase shift between the elements.
A simple way to create a phase shift is to insert a delay line in the path of each antenna element.
Practically this can be easily done by switching transmission line sections in and out of the feed path.