For detecting the malignant cancerous tissues in the breast, various techniques are used like Mammography, MRI, Ultra Sound, etc. But such types of technology are miserable while examining. The Microwave Breast Imaging technique has generated scattered signals after transmission of Microwave signals. This causes a loss of information. Therefore 1 × 4 array antenna is design, to detect the tumor at early stage and this array antenna is more specific to detect the malignant tissues. The array antenna has 1 × 4 array, with Defected Ground Structure which will increase the efficiency of this model. This model is used in ISM (Industrial, Scientific, and Medical) band having frequency 2.4 GHz. This band is unlicensed frequency band. © 2018, Springer Nature Singapore Pte Ltd.