I hope you will find some useful software here -->>> http://www.electromagnetics.biz/Tools.htm
I will ask around of my local group and see what someone who used the LPDA may have a copy of the program you are looking for. A lot of folks have no clue what a LPDA is,other than the old standard of Log Periodic Dipole Array. In the meantime I hope you find the above mentioned web site useful. Very 73 from Hope, Rhode Island, USA. Myrton - N1GKE - SKCC # 5521 30MDG # 2922 "I use the original form of social networking, Amateur Radio."