The wideband antennas play significant role in the communication fields especially in satellite and military applications. Since the satellite or aircraft is in motion, the size of the wideband antenna as well as the polarization is very important. Electro-magnetic band gap structures and artificial magnetic conductor structures are usually used to enhance the spiral antenna properties. But these structures are absorbing materials and the bandwidth will be reduced. Here, a spiral antenna is designed, simulated and fabricated for aircraft applications with bandwidth enhancement.