We propose a 60-GHz radial line slot antenna (RLSA), which is fed by a Butler matrix, for orbital angular momentum (OAM) applications. The Butler matrix is placed at the lower layer and it is based on a post-wall waveguide structure. It has four input ports and it can launch different progressive phase states in the RLSA parallel plate waveguide (PPW). The RLSA in the upper layer is fed by the Butler matrix through four posts. The simulated results show that, at the design frequency, the proposed antenna can generate three OAM-mode states: l = 0, -1 and +1.
A 60-GHz RLSA fed by butler matrix carrying three OAM modes / Xin, Xu; Dan, Mori; Agnese, Mazzinghi; Angelo, Freni; Jiro, Hirokawa; Makoto, Ando; Kiyomichi, Araki. - STAMPA. - 1:(2017), pp. 1445-1446. (Intervento presentato al convegno 2017 IEEE International Symposium on Antennas and Propagation tenutosi a San Diego, CA, USA nel 9-14 July 2017) [10.1109/APUSNCURSINRSM.2017.8072765].
A 60-GHz RLSA fed by butler matrix carrying three OAM modes
Agnese Mazzinghi;Angelo Freni;
2017
Abstract
We propose a 60-GHz radial line slot antenna (RLSA), which is fed by a Butler matrix, for orbital angular momentum (OAM) applications. The Butler matrix is placed at the lower layer and it is based on a post-wall waveguide structure. It has four input ports and it can launch different progressive phase states in the RLSA parallel plate waveguide (PPW). The RLSA in the upper layer is fed by the Butler matrix through four posts. The simulated results show that, at the design frequency, the proposed antenna can generate three OAM-mode states: l = 0, -1 and +1.
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