enfire antenna design c band

check the link.
http://www.ece.rutgers.edu/~orfanidi/ewa/ch20.pdf

In principle you can take any antenna and scale it by wavelength ratio. Endfire antennas are in principle resonant dipoles (sometimes Yagis) with resonant box-like reflectors. At 4-5 GHz a Yagi would be difficult to design; I would recommend to use the dipole and box reflector, with dimensions scaled to wavelength.

The elevation angle is the axis orientation, nothing to do with antenna design.