Miniaturized, Low‐Profile, Ship‐Shaped Broadband Antenna Designed by Distributed Structures Loading

In this paper, we designed a miniaturized broadband antenna by combining grid technology similar to fractal and distributed structures loading techniques. The antenna consists of three parts: a ship‐shaped reflector, tilted side metal plates, and a magneto‐electric dipole radiation oscillator. We first achieve a preliminary reduction in the electrical size of the antenna by grid processing the horizontal electric dipole portion of the magneto‐electric dipole. Then, a metal wall is introduced at the end of the antenna to form a capacitance with the edge of the electric dipole, thereby significantly reducing the electrical size of the antenna. Finally, inspired by fish fins, a tilted trapezoidal baffle was added to the yoz ‐plane of the antenna to rectify the high‐frequency radiation pattern and improve impedance matching across all frequency bands. A prototype antenna was manufactured using 3D printing technology, and the measured results showed that the antenna achieved a continuous impedance bandwidth of 4.39:1 (0.78–3.43 GHz) with , corresponding to an electrical size of . Furthermore, the gain remains highly stable across the entire frequency band, with a peak gain of 3.67 dBi.