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A new microstrip-fed printed slot antenna based on Moore space-filling geometry

In this paper, a new design of miniature, multiband slot antenna is presented. The slot structure of the proposed antenna is based on the 3rd iteration of the Moore space-filling geometry, which is a closed variant of the conventional Hilbert space-filling curve. The slot structure is constructed on the ground plane side of a dielectric substrate. The slot antenna is fed by a 50 Ω microstrip line, printed on the reverse side of the substrate. The proposed antenna possesses a miniature size with a slot side length of about half the guided wavelength. Furthermore, the antenna performance curves show that it offers a multiband behaviour with enhanced bandwidths, as compared with those offered by antenna structures based on other spacefilling geometries. Expressions have been presented to correlate antenna slot parameters with the first resonant frequency, and among the subsequent resonant frequencies as well.