Certainly YES. I made it working at 900 MHz, 1600 MHz & 2400 MHz. In particular, you can go for sierpinski carpet(square) fractal printed on a patch. Sierpinski gasket (triangle) design is not so trivial to get the bands that are closely spaced.
now, as i know that it is possible to use fractal geometries for cellular handheld multiband antenna design,i would like to try out some actual designma(on IE3d probably).and it'll be very much helpful if anybody send me some of the papers (possibly dealing with the gsm bands)so as to get some initial idea of the design procedure and design the constraints.
You can use fractal planar antennas. But the problem is may be the whole antenna size that can be a little bit big regarding the fact that handset are getting smaller nowadays.
I've been working on wire fractals, small koch monopole etc. and I couldn't find a way to have a wideband design using wire shapes. anyone has an idea?? i don't want to go through patches