On a sunny day (Tue, 27 Dec 2005 02:03:01 GMT) it happened "Jim Hampton"
wrote in :

Hello, Tomerbr

Check out this URL:
http://groups.yahoo.com/group/HamRadioHelpGroup

We'll try and give you an honest answer.

Antennas can direct energy in an specific direction (and kill radiation in
other directions) to end up with a definite "gain" where you wish to
communicate with.

Check the group out or e-mail me with questions at
I always thought 1/4 length was easier because you can make one easily from 1/1 length
by breaking in half exactly two times.
And then you have 4, so more economic too.

I always thought 1/4 length was easier because you can make one easily from 1/1 length
by breaking in half exactly two times.
And then you have 4, so more economic too.

A dipole is made from two quarterwaves. An odd quarterwave is
easy to match to. Any other length needs a matching network
of some kind. Gain comes about from directing the RF in
some directions. This can be one direction like a beam,
or omnidirectional with something more complicated then a
simple quarterwave antenna.

Tell your instructor he needs some more instruction.
(Electronics books are in 621 at the library)