The three parasites can clearly be seen on the picture - two directors and one reflector. The overall view of the antenna can be seen on Fig.1. Adding passive elements extends the boom length to 10.2 meters. This antenna consists of 7 meters long 11 element LPDA cell covering one octave of frequencies from 14 to 29 MHz with 4 passive elements (parasites) enhancing the LPDA's performance on 20, 15 and 10 meter amateur bands. I will illustrate the effect of implementing passive elements with the oldest MMANA based project of mine dated March the 28th of 2008 (there were other projects done in different SW products dated late 90s early 2000s but I lost'em with the crush of an HDD). IMPLEMENTING PASSIVE ELEMENTS INTO LPDA STRUCTURE Thanks God, we've survived and now I can even afford devoting some time to my hobby within the hobby - building antennas of my own design. So, for some 15 years my mind was occupied with matters of surviving of my family with 2 children on our hands rather than LPA's and its features. Once I graduated from the Institute I was involved for some 8 years in a research work that was not in the RF field, then the Perestroika took us by surprise with the total collapse of the soviet system as the result and then the wild 90's took its place.

I and my teammates built an 8 element 20 meter band Log-Yagi with 4 element log-cell, 3 parasitic directors and 1 reflector in 1978. That's the Institute that UK9AAN belonged to. The magazine was available in the Chelyabinsk Polytechnic Institute's technical library. by Peter Rhodes K4EWG on Log-Yagi for 20m band. My work was partialy based on materials from article in Nov.

My first LPDA project was student's work in 1976 on practical and theoretical issues of building narrow banded Log-Yagis. It has been for most of my conscious amateur radio life that I was interested in Log-Periodics. I hope these know-hows will help you make your antennas more efficient. There are few know-hows in those models but I am sharing them with you for one reason - I decided that the time to share my knowledge with a larger group of people has come, I no longer want to keep it just for my own use. I will reveal some of my MMANA based antenna files for your own use and further evaluation and improvements of the models. In this article I want to share with you practical results of building LPDAs of different types. UA9BA hybrids of LPDA and Yagi Udas and other practical examples of multiband antennas

Library of mmana antenna files