Broad-band space-filling-based slot antenna

Based on the use of space-filling curves, a broadband microstrip-fed slot antenna is proposed. Broad-band performance is achieved through merging different downscaled versions of a composition of “island-like” space-filling slot antennas without increasing the overall antenna size. This technique provides different resonant slot lengths corresponding to a wide range of frequencies. By merging three downscaled versions of a composite second-iteration Moore slot antenna, we design a broad-band slot antenna. As the proposed broad-band slot antenna is composed of “island-like” space-filling curves which provide different resonant slot lengths over a wide range of frequencies, the measured 10-dB return loss bandwidth of the proposed antenna ranges from 2.5GHz to 17.2GHz. Experimental results are compared with simulated results and a very good agreement is obtained.