Is an angel food cake pan necessary?
It is possible to get away with using small pans to bake little angel food cakes (like cupcakes, for example), but if you’re planning on baking one big cake then yes, you will need a large tube pan.
An angel food cake tube pan is designed specifically so that the egg whites in the batter cook evenly and are allowed to rise high as they bake. The hole in the center in necessary, and so are tall, straight, and not non-stick sides.
Most kitchen supply stores carry angel food cake pans, but you can also shop online.