what's Balun ?

I want to know simply, what does Balun mean? and why we use it?
also Sleeve antenna?

Thanks in advance,
Ahamd,

Balun stands for balanced to unbalanced.. a converting device....

balun is a differential to single ended conversion circuit

khouly

Hope these are helpful.

very good article about balun.

Let me try:

The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one; in a balanced device (as larger type of antennas) we have on both terminal the same voltage respect to the ground (if not so it's an unbalanced device); a dipole with direct feed is balanced, a coaxial cable is unbalanced. Why balun is used/ You can read further at: http://www.qsl.net/iz7ath/web/02_bre.../pag01_eng.htm

And if you want to build a balun then read its use and hows at: http://www.hamuniverse.com/balun.html