This study presents the ultra-rapid deployable UAV antennas for VLF, LF, MF, and HF applications. The proposed compact design consisting of the flexible radiating structure carried and positioned by the multi-rotor UAV can significantly reduce the antenna size, weight, and cost. It is basically intended for tactical communication, underground/underwater radio, and surface-wave radar applications but with simpler, lighter, and cheaper structures. Simulated and measured results substantiate that the proposed method can be employed to provide satisfactory radiation characteristics for large antenna systems. Moreover, this UAV antenna can be used to realize the dynamic polarization and pattern tuning of the antenna.