Multiband-multislot planar antenna based on small loop-radiator

In this article, a novel multiband-multislot planar antenna is presented. The proposed antenna is based on the small loop-and slot radiators, showing multiple resonances. The antenna is built on a substrate with a permittivity of 2.2 and a thickness of 1.27 mm. The antenna resonates at 0.84, 1.55, 2.5 and 4.8 GHz behaving with quasi-omnidirectional radiation patterns, which can be employed in the state of the art automotive technology, laptops and tablets among other terminal devices. The resonances can be shifted to lower or higher frequencies depending on the slots length and width, as well as the magnetic coupling among them. Moreover, additional resonances can be introduced by etching new slots on the substrate metallization.