Analyses and Full-Duplex Applications of Circularly Polarized OAM Arrays Using Sequentially Rotated Configuration

作者：Zhang, Yi-Ming; Li, Jia-Lin^*

来源：IEEE Transactions on Antennas and Propagation, 2018, 66(12): 7010-7020.

DOI：10.1109/TAP.2018.2872169

• Full duplex
• orbital angular momentum (OAM)
• self-interference suppression
• sequentially rotated configuration

This paper presents the analyses of circularly polarized orbital angular momentum (OAM) ring arrays using sequentially rotated configurations. For the studied OAM-based microstrip antenna arrays, the relationship between the excitation settings and the generated OAM modes are studied together with the axial ratio (AR) bandwidths at the beam maximums. Furthermore, a dual-OAM-mode circularly polarized array is proposed for full-duplex applications. Based on the presented OAM-mode selection method, the self-interference due to the strong mutual coupling within the array can be well canceled, leading to a high interport isolation. A demonstrator centered at 15 GHz with OAM modes of + 1 and + 2 is developed and fabricated for verification purposes. The demonstrator uses a sharing antenna scheme for the two OAM modes to realize a compact architecture. Measured results indicate that the demonstrator characterizes good interport isolation within a wide bandwidth from 13.92 to 16.38 GHz referring to a 45 dB level as well as wide AR bandwidths at the beam maximums.

• 出版日期2018-12
• 单位电子科技大学