1：Experimental Design and Method Selection:

The design and simulation process have been done using CST Microwave Studio. The design specifications of the finally proposed antenna have been finalized after adjusting all the physical parameters and observing the results of the antenna again and again using trial and error basis.

2：Sample Selection and Data Sources:

The proposed antennas have been designed on FR4 (lossy) dielectric substrate with relative dielectric constant of

3：3 and tangent loss of List of Experimental Equipment and Materials:

The metallic layer is made of copper and its thickness is of

4：03 mm. Experimental Procedures and Operational Workflow:

The total process has been presented in four steps. At first step, a general coplanar waveguide fed tapered slot Vivaldi antenna has been designed and optimized without any slot. Then some circular slots on copper layer are introduced in the second step. At third step, some gratings have been incorporated. Finally, some different shaped slots on copper layer have been used on the third step to get the expected performance of the antenna specially to cover the aforementioned entire UWB frequency range.

5：Data Analysis Methods:

Different strategies, one by one, have been applied on the Vivaldi antenna during design in order to enhance the performance and make sure the usefulness of the antenna within the target ultra wide frequency band.