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Frequency‐reconfigurable slot antenna with wide‐tuning range using metasurface
Author(s) -
Zhu H. L.,
Cheung S.W.,
Yuk T. I.
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29116
Subject(s) - reconfigurable antenna , slot antenna , antenna (radio) , electronic engineering , range (aeronautics) , computer science , electrical engineering , microstrip antenna , physics , engineering , telecommunications , coaxial antenna , aerospace engineering
ABSTRACT A frequency‐reconfigurable slot antenna designed using metasurface (MS) is proposed in this paper. The frequency‐reconfigurable metasurfaced (FRMS) antenna is composed of a simple slot antenna and a MS, both having a circular shape with the same diameter of 50 mm (equivalent to 0.5λ 0 where λ 0 is the operating wavelength in free space) and implemented using planar technology. The MS consists of rectangular‐loop unit cells, with a large length‐to‐width ratio, placed periodically in the vertical and horizontal directions. The MS is placed directly on top of the slot antenna, making the FRMS antenna very compact and low profile with a thickness of only 3.048 mm (0.03 λ 0 ). The operating frequency of the antenna can be tuned by physically rotating the MS around the center with respect to the patch antenna. The antenna is studied using computer simulation. For verification of simulation results, the FRMS antenna is fabricated and measured. Simulated and measured results agree very well. With the use of a large length‐to‐width ratio in the rectangular‐loop units cells and slot antenna which has a wide bandwidth, results show that the proposed RFMS antenna has a wide tuning range of 28% (from 2.64 to 3.5 GHz). © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1475–1481, 2015