Slot Cut Ultra Wide Band Antennas

The ultra wide band antennas are required in applications where larger bandwidth for the transmitting signal is needed. They cover wide bandwidth in the range from 500 MHz to the frequencies above 8000 MHz. In this paper, a review of various techniques to realize ultra wide band microstrip antennas (MSA) is presented. They are realized by using different techniques like basic planar monopole antenna and the variations of the same by using different shapes of radiating monopole antenna, like, bi-conical, Bowtie, etc. They are also realized by using modifying the feeding strip shape or by cutting the slot inside the patch. The ultra wide band (UWB) response has also been realized by using fractal shapes in the radiating monopole antenna. Towards the end of paper, the scope of future work is proposed, wherein the exact formulation of resonant length is needed for planar monopole antenna at its fundamental and higher order modes as well as the explanation for the ultra wide band response in terms of operating modes in slot cut and fractal geometries.