Cancer is the most frequent and deadly disease, with an increasing number of cancer patients and deaths. Breast cancer is becoming the most common type of cancer among women. This paper describes an octagonal‐shaped ultrawide band patch antenna with a denim substrate having a dielectric constant of 1.7. Various positions of the tumor inside the breast phantom are analyzed by the designed antenna using computer simulation technology (CST) Microwave Studio. Multiple tumors are traced by specific absorption rate analysis. The frequency range covered by the antenna is 2.4–10.1 GHz.
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