13 element curtain quad with 2 X 4 mesh reflector.
Since there seems to be a demand for a very high gain low uhf channel antenna, this one, while large (60" wide X 76" high, reflector to driven element distance of 4.5"), is a fairly easy build using common materials.
The reflector is common 2" X 4" galvanized mesh and the elements are galvanized 4 gauge wire. The Net Gain at 500mhz is about 17.7 dbi, about 3+ dbi higher than perfectly stacked XG91's at 500mhz.
The NEC file : http://www.wuala.com/300ohm/Documents/CQ_13ele2X4reflector500mhz.nec
BTW, the curtain quads scale nicely in the uhf range.
Since there seems to be a demand for a very high gain low uhf channel antenna, this one, while large (60" wide X 76" high, reflector to driven element distance of 4.5"), is a fairly easy build using common materials.
The reflector is common 2" X 4" galvanized mesh and the elements are galvanized 4 gauge wire. The Net Gain at 500mhz is about 17.7 dbi, about 3+ dbi higher than perfectly stacked XG91's at 500mhz.



The NEC file : http://www.wuala.com/300ohm/Documents/CQ_13ele2X4reflector500mhz.nec
BTW, the curtain quads scale nicely in the uhf range.