Dual-Frequency Shared-Aperture Fabry-Perot Cavity-Integrated Monopole Antenna

In this paper, a dual-frequency shared-aperture antenna working at 3.15-3.85 GHz and 11-11.8 GHz is designed based on the structure reused technology. Fabry-Perot resonator antenna is adopted for high-frequency antenna, the low-frequency antenna is a monopole antenna loaded with partially reflective surface, covering the Sub-6 GHz band of 3.3-3.8 GHz. The design of the dual-frequency shared-aperture antenna is realized by the multiplexing of partially reflective surface (PRS) and the metal ground. The dimension parameters of partially reflective surface and the height of the resonator cavity can be adjusted to change the working band of the low-frequency antenna. The radiation beam of the high-frequency antenna is a high gain beam, and the radiation pattern of the low-frequency antenna is omnidirectional. The two patterns do not interfere with each other, which can effectively avoid the deterioration of the pattern. Finally, the high frequency Fabry-Perot resonator antenna achieved gains of 18.3 dBi at 11.2 GHz and the low frequency antenna achieved gains of 4.45 dBi at 3.3 GHz.