We use the BATWING with the added DIPOLES for UHF.
Gets the OTA CLEAR STATIONS just great for us here on the East side of the US. A better photo here showing the DIPOLES from GOOGLE.
Have played with the JACK and after awhile went back to the BATWING
The BEST ANTENNA I had before the DIGITAL NATL BROADCAST changeover happened was one of LOWES $90 HOME YAGI antenna but it finally got destroyed setting up and taking down so many times. It also was so large it hit trees when I rotated it haha...
Of late I have been experimenting with a DB8 BOW TIE array to use on the OFF-ROAD POPUP. Right now it is setup for the house and is doing an outstanding job picking up DIGITAL UHF stations 50 miles away from Washington C an Richmond VA. great. Haven't tried it yet in the OFF ROAD mode trails around here.