Design of Miniaturized Antenna Array for Microwave Imaging Application

Abstract

To detect the presence of tumor in the breast, a miniaturized Ultra-wideband (UWB) antenna is simulated with the use of CST microwave studio. In free space, its operating range is about 3.548GHz. The Flame Retardant (FR-4) material is used as a substrate in the design of the microstrip antenna. The antenna has the dimensions of 16 x 20 mm. The improved bandwidth is obtained by making some modifications in the patch and ground plane. To improve the gain and directivity, an array of 2 x 2 elements are created. The improvement in gain and directivity is analyzed for different spacing between the elements like λ/2 and λ. The spacing of λ/2 between the elements created gives the improved directivity and gain.