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Circularly polarized sequentially rotated antenna array for dual‐band WLAN applications
Author(s) -
Pan ChienYuan,
Chen HuanYu
Publication year - 2021
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.22590
Subject(s) - wideband , multi band device , physics , turnstile antenna , axial ratio , bandwidth (computing) , return loss , optics , antenna (radio) , circular polarization , electrical engineering , antenna measurement , slot antenna , telecommunications , computer science , engineering , microstrip
This article presents a dual‐band circularly polarized (CP) 2 × 2 sequentially rotated (SR) antenna array with four slot antennas, a wideband sequential‐phase shifter (SPS), and reflected plane for wireless local area network (WLAN) operations. By designing the four slot antennas for dual‐band CP operations, the wideband SPS including four outputs with a sequential phase shift of 90° for improving bandwidth, and a conductor‐backed reflected plane for enhancing antenna gain, a high‐gain and dual‐band CP SR antenna array can be realized. The measured impedance bandwidth for return loss of 10 dB is 93.81% (2.36‐6.5 GHz). Both measured CP bandwidths for axial ratio of 3 dB are 22.64% (2.35‐2.95 GHz) and 49.16% (4.5‐6.77 GHz), which can cover all the WLAN bands. Maximum antenna gains are 12.32, 9.91, and 11.66 dBic in the range of 2.4 to 2.484, 5.15 to 5.35, and 5.725 to 5.875 GHz, respectively.