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

Lee wrote:

"Richard Clark" wrote in message
...

On Wed, 30 Aug 2006 06:19:09 GMT, "Lee"
wrote:


SNIP!!!!

Richard, all i want is design software to build a LPA!!!! do you or
don`t you know of any?????

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