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Radiation pattern symmetry of a switched parasitic smart antenna is important for full 360 0 azimuthal coverage. The ideal symmetrical beam patterns are hard to achieve in reality due to a number of crucial problems related to the need for precision design and manufacture, and the accuracy of the supporting electronics. These factors are examined on this paper.

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UWB microstrip antenna has been designed using UWB technology and the principle of Microwave Imaging system that works at UWB frequencies. The Simulation performed using Ansoft HFSS version 13 software to construct the microstrip antenna with some important parameters, such as reflection coefficient (SII) and radiation pattern. This purpose of the antenna is fetal detecting and monitoring system in dual band at (2.54 -4.45) GHz with the bandwidth of 1.91 GHz and (6.53 -7.97) GHz with the bandwidth of 1.44 GHz. The antenna will be tested with two conditions, with fetal and without fetal model to find the difference characteristic of each tissue layer.