Abstract
A dual-band monopole antenna exploiting the use of a novel double-negative metamaterial is discussed in this article for use in vehicular communications. The proposed unit cell consists of an H-cell resonator sandwiched between two inverted “E” shaped resonator connected to a “T” stub. The proposed unit cell exhibits double negative property from 3.4 to 5 GHz. The dual-band property is achieved by loading the monopole with the proposed metamaterial. The loaded monopole antenna offers dual-band property with resonance at 2.4 and 3.8 GHz making the antenna suitable for terrestrial communications in automobiles. Along with dual-band property, the proposed antenna also offers miniaturization through frequency reduction. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The proposed antenna offers 6% and 9.15% measured impedance bandwidth with voltage standing wave ratio less than 2 and realized antenna gain greater than 3.2 dBi. Furthermore, the impact of the vehicle's body on the antenna performance is simulated and the results are presented.
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