Repozytorium publikacji - Politechnika Gdańska

A conformal reflectarray fed by a dual-band multiple-input multiple-output (MIMO) antenna is proposed for low-cost beam steering applications in 5G Millimeter-wave frequency bands. The beam steering is accomplished by selecting a specific port in the MIMO antenna. Each MIMO port is associated with a beam that points in a different direction due to a conformal reflectarray. This novel reflectarray antenna design has the advantages of higher gain, lower cost, a simpler feeding source, and a lower profile when compared to traditional reflectarrays using bulky horn antennas and phased arrays with complex feeding networks and phase shifters for beam steering. The proposed beam steering antenna consists of a compact five-element dual-band MIMO and a 32 × 32 unit-cell conformal dual-band reflect-array placed at the top of the MIMO antenna to obtain the beam steering capability as well as gain enhancement. The reflectarray has a stable response under oblique incidence angles of up to 600 at 24 and 38 GHz and its symmetric, single-layer structure ensures polarization insensitivity and stable response in conformal conditions. The MIMO antenna design is not only compact but also offers a wideband response and effectively covering the desired 5G mm-wave frequency bands. The overall size of the MIMO antenna alone is 70 × 12 mm2 with a maximum gain of 5.4 and 7.2 dB. It is further improved up to 13.1 and 14.2 dB at 24 and 38 GHz respectively, with a beam steering range of ±400 by using a conformal reflectarray. Unlike the existing beam steering strategies, the suggested method is not only cost-effective but also increases the overall directivity and gain of the source MIMO antenna. The measured results agree with the simulated results, making it a potential candidate in the 5G and beyond beam steering applications.

Autorzy

• dr inż. Bilal Malik link otwiera się w nowej karcie ,
• dr inż. Shahid Khan link otwiera się w nowej karcie ,
• prof. dr inż. Sławomir Kozieł link otwiera się w nowej karcie