An Arrow-shaped, Dual-Polarized Antenna and Its Three-Beam Splitting Array

In this paper, an arrow-shaped, dual-polarized antenna is demonstrated. It mainly contains five parts: the arrow-shaped dipoles, feed substrates, circular radiator, bedframe, and reflector. Both of the two dipoles of the proposed antenna participate the synthetic process, which is quite different from the working mode of the conventional crossed dipole antenna. A circular radiator is then suspended above the dipoles to further broaden the bandwidth. The proposed antenna element can provide a measured bandwidth of 34% (|S
₁₁
| <; -14 dB or VSWR <; 1.5) from 0.69 to 0.97 GHz. Besides, due to the vector synthetic futures, high isolation over 26 dB is obtained. A 4 × 4 array is presented and verified in simulation. By assigning each antenna element with different amplitude and phase, the antenna array could provide 10~14° downtilt in V-plane and three-beam radiation in H-plane. Thus, the antenna array could precisely control the coverage area and substantially improve the communication capacity. All the results reveal that the antenna is suitable for the hot spots communication which needs high speed and high capacity.