Abstract
In this work, a single port exponential tapered toothed log periodic antenna based on graphene artificial magnetic conductor (AMC) is suggested for ultra-wideband (1–10) THz operation. The resonance frequency of the proposed antenna can be tuned by changing the connected DC voltage which leads to variation in the chemical potential of the graphene.The radiating toothed log periodic antenna consists of gold patch placed on 25x25 graphene patches which act as an AMC surface unit. Exponential taper is used to satisfy impedance matching between the antenna and the feeder over the frequency range. The simulation results reveal that 90% of frequency range satisfies when the chemical potential is1eV.
Highlights
Graphene has been named the simplest complex material whichhas drawn increasing attention in recent years due to its unique properties and advantages
This structure has been broadly utilized in the design of some types of antennas such as low profile leaky wave antenna operating at microwave regime with high efficiency and gain in correlation with conventional ground plane
The graphene is used as an artificial magnetic conductor (AMC) unit cell which consists of a periodic of square patches with dimension D and the gap between adjacent patches is g as in Figure 1 (Wang, Zhao, Hu & Zhang, 2013)
Summary
Graphene has been named the simplest complex material whichhas drawn increasing attention in recent years due to its unique properties and advantages. The graphene can be used to design THz antennas, as radiating part (Esquius-Morote, Gomez-Dıaz & Perruisseau-Carrier, 2014; Tamagnone, Gomez-Dıaz, Mosig & Perruisseau-Carrier, 2012), parasitic component, or high impedance surfaces (HIS) usually based on AMC configuration (Dragoman, Muller, Dragoman, Coccetti & Plana, 2010; Tamagnone, Gomez Diaz, Mosig & Perruisseau-Carrier, 2013). The AMC is a planar array of periodic surface which can improve the control of electromagnetic wave radiation. This structure has been broadly utilized in the design of some types of antennas such as low profile leaky wave antenna operating at microwave regime with high efficiency and gain in correlation with conventional ground plane. The applied voltage is used to tune this antenna in order to wide its bandwidth
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