Broadband planar slot antenna using a simple single-layer FSS stopband
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Date
2019-12
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Publisher
Université de M'sila
Abstract
In this study, the authors propose a simple structure of a new broadband planar slot antenna using a wide single-layer
frequency selective surface (FSS) stopband. The proposed design is realised in two stages. First, the performances of the FSS
unit cells are investigated using the finite element method of high-frequency structure simulator. Besides, the FSS structure
considered as a stop-band filter in the bandwidth (3 − 7 GHz), is also validated by computer simulation technology microwave
studio. Second, this FSS reflector is combined with a miniaturised wideband planar slot antenna (29 × 24 × 1.57 mm3). The final
proposed combination is also designed, optimised, fabricated and validated by measurements. The obtained results show an
operating impedance bandwidth of 86.38% (2.92 − 7.36 GHz) including the Worldwide interoperability for Microwave Access band,
the C band for satellite applications, and the Wireless Local Area Network band. Furthermore, the antenna provides an 8.87 dBi
measured maximum gain. Compared to the same antenna without FSS, a maximum gain enhancement of 5.53 dBi is achieved
by the proposed structure. In addition, the back lobes are reduced in the proposed structure by > 15 dBi, compared to a simple
antenna. The total size of the proposed antenna, integrating the FSS, is 0.63λ0 × 0.63λ0 × 0.12λ0.