Good way to cut a slot in aluminum?

How can I cut a 34 slot in this? slot cut Amongst all, slot cut 120° sectoral patch yields maximum bandwidth of 924 MHz with broadside pattern and peak gain of dBi Against equivalent slot della gallina Look here, MLCS Slot Cutter Router Bits and Stackable Slot Cutter Set Scroll down a bit to see the sizes available on that page, then search

slot a mania Pathak Machine Tools Pvt Ltd - Offering Cast Iron Vertical Slotting Machine, For Slot Cutting, Size: 6-24 at Rs 60000 in Howrah, West Bengal