From a simple point of view the rods type rear reflector allows more signal to the be received at the back side of the antenna. And a little less signal to be reflected at the front of the antenna. Now days the internet is bubbling over with this antenna comparison and that comparison and some other antenna comparison. Here is one of many , http://www.dtvusaforum.com/antenna-r...nalyzer-2.html
I couldn't get the link to work properly with my older Windows 98 computer. IE 6 was having a problem- actually a couple problems. What was the conclusion?