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Circularly polarized beam‐steering antenna array for ultra‐high frequency radio frequency identification applications
Author(s) -
Liu Yi,
Liu Changrong,
Liu Xueguan,
Yang Xinmi
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21890
Subject(s) - antenna (radio) , turnstile antenna , beam steering , optics , antenna array , radio frequency identification , radiation pattern , circular polarization , polarization (electrochemistry) , coaxial antenna , physics , microstrip antenna , antenna rotator , antenna measurement , beam (structure) , computer science , telecommunications , microstrip , chemistry , computer security
A circularly polarized beam‐steering antenna array with Butler matrix is designed in this letter for ultra‐high frequency radio frequency identification applications. To achieve the identification of the fast‐moving tag groups, a 3 × 4 Butler matrix is utilized to switch the radiation directions at −25°, 0°, and +25°, respectively. Besides, series‐fed patch antenna element is designed and the 1 × 4 antenna array is built with element rotation for a good polarization performance. Finally, the proposed antenna system is fabricated and the identification area and radiation performance are tested.