A Controllable Multifunctional Four-Arm Helical Antenna Array

For the needs of ship communication and high-precision navigation under severe sea conditions at sea, this paper proposes a controllable multifunctional antenna array, which combines the antenna array element, controllable base unit, and controllable broadband power division feed network together. Simulation analysis results show that the antenna array has good performance under two modes of operation in the maritime communication band. The maximum gain of the antenna array can reach 13.4 dB under mode 1 operation, and the gain of the antenna array can be not less than 1 dB in 0° low elevation angle area under mode 2 operation, which indicates that the designed antenna array is very suitable for the maritime ship communication and distress search and rescue communication in the changing environment.