Journal
IEEE TRANSACTIONS ON NANOTECHNOLOGY
Volume 14, Issue 1, Pages 62-69Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNANO.2014.2365205
Keywords
Frequency selective surface (FSS); graphene; high-impedance surface (HIS); leaky-wave antenna (LWA); reconfigurable characteristics; tunability
Categories
Funding
- National NSFC [61431014, 61171037, 61271065]
- Zhejiang Provincial NSFC [LZ14F010001, LQ14F010010]
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The concept of graphene-based two-dimensional leaky-wave antenna (LWA), allowing both frequency tuning and beam steering in the terahertz band, is proposed in this paper. In its design, a graphene sheet is used as a tuning part of the high-impedance surface (HIS) that acts as the ground plane of such 2-D LWA. It is shown that, by adjusting the graphene conductivity, the reflection phase of the HIS can be altered effectively, thus controlling the resonant frequency of the 2-D LWA over a broad band. In addition, a flexible adjustment of its pointing direction can be achieved over a wide range, while keeping the operating frequency fixed. Transmission-line methods are used to accurately predict the antenna reconfigurable characteristics, which are further verified by means of commercial full-wave analysis tools.
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