Abdul Ghani Firas, Najafabadi Amir Mohsen Ahmadi, Saleh Heba, Kaya Yapici Murat, Tekin Ibrahim
Electronics Engineering, Sabanci University, Istanbul 34956, Turkey.
Sabanci University SUNUM Nanotechnology Research Center, Istanbul 34956, Turkey.
Sensors (Basel). 2021 Oct 27;21(21):7138. doi: 10.3390/s21217138.
In this paper, a dual-polarized four-port 2 × 2 series fed antenna array operating at 28 GHz with beam-switching capability is proposed. The antenna array uses a simple passive beamforming network to switch the main beam. The presented antenna design is suitable for 5G user equipment and high data rates applications by which it has a compact size with low cost and complexity. The size of the antenna is 37.2 × 37.2 mm2 including the ground plane, and it produces 10 different switched beams by using only two simple 3 dB/90∘ couplers which create the required amplitudes and phase excitations for the antenna elements. A one-port simple feeding mechanism including Peregrine PE42525 SPDT switch modules and a power divider is used to generate and measure the 10 switched beams. The antenna design is implemented on a two-layer 0.203 mm thick low-loss (tanδ = 0.0027) Rogers 4003C substrate, and it has a measured 10 dB impedance bandwidth of 4 GHz (14.3%, from 26 GHz to 30 GHz) for all ports. Measured peak isolation between any dual-polarized ports of the antenna is better than 30 dB. The antenna has an average measured realized gain of 8.9 dBi and around 10 dB side lobe level (SLL) for all beams. The antenna has 3-dB coverage of 80∘ to 90∘ in 2D space and it has a maximum of ±26∘ beam-steering angle. The antenna is designed and simulated using Ansys HFSS and fabricated using regular PCB processing.
本文提出了一种工作在28GHz、具有波束切换能力的双极化四端口2×2串联馈电天线阵列。该天线阵列采用简单的无源波束形成网络来切换主波束。所提出的天线设计适用于5G用户设备和高数据速率应用，具有紧凑的尺寸、低成本和低复杂度。天线尺寸包括接地平面为37.2×37.2mm²，通过仅使用两个简单的3dB/90°耦合器产生10种不同的切换波束，这两个耦合器为天线元件创建所需的幅度和相位激励。采用包括Peregrine PE42525单刀双掷开关模块和功率分配器的单端口简单馈电机制来生成和测量这10种切换波束。天线设计在两层0.203mm厚的低损耗（tanδ = 0.0027）Rogers 4003C基板上实现，所有端口的实测10dB阻抗带宽为4GHz（14.3%，从26GHz到30GHz）。天线任意双极化端口之间的实测峰值隔离度优于30dB。所有波束的天线平均实测增益为8.9dBi，旁瓣电平（SLL）约为10dB。天线在二维空间中的3dB覆盖范围为80°至90°，最大波束转向角为±26°。天线使用Ansys HFSS进行设计和仿真，并采用常规PCB工艺制造。
