Coplanar quasi-Yagi, 915 MHz, single copper layer on FR4 1.6 mm, board cut to ribs.
.gtl top copper (reflector+balun+driven = one piece; 2 floating directors)
.gko board outline / edge cuts (ribbed frame: ribs + spine + rails; windows are cut out)
.drl Excellon drills: coax centre 1.0 / shield 1.6 + 4x M2 2.2
Slit between the two feed strips = shorted ~lambda/4 slotline balun.
Coax solders at the driven element: centre->+y arm, shield->-y arm.
