"Dave" wrote in message
. ..
ARRL Antenna Handbook gives all the LPDA design equations.

However, LPDAs do not have high gain!! They have typical gain of 6 to 8
[+/-]
dBd and broad bandwidth. They typically function as either a three or four
element driven array. They are driven arrays, not parasitic [i.e. Yagi
principle] designs.

Also, LPDAs for 3,000 MHz will have a L/D ratio issues with element
geometry and
general construction will require fairly precise measurements.

Unlike a Yagi, a long boom length LPDA does not equate into higher gain.

/s/ DD

Yes thanks Dave i am aware of the functions of a LPA i just need a little
directivity
and a little more gain than a discone offers, plus design software!!...

Regards...

Lee....G6ZSG......

Lee wrote:

Yes thanks Dave i am aware of the functions of a LPA i just need a little
directivity
and a little more gain than a discone offers, plus design software!!...

If you're looking for software to design an antenna for you, EZNEC isn't
it. EZNEC will analyze an antenna you design, but it won't design it for
you.

Roy Lewallen, W7EL