Multi-Slotted Microstrip Patch Antenna for Brain Tumor Detection
Microstrip patch antennas are used in various fields such as spacecraft, satellite communication, mobile communication and even its usage is blooming in the field of biomedical engineering. A Multi-slotted microstrip patch antenna is designed for brain tumor detection with a minimal SAR (Specific Absorption Rate) value. Antennas are designed and simulated using CST Microwave Studio, which is a 3D EM simulator based on the principle of Finite Integration in Technique (FIT). Since the antenna needs to be placed in close contact with the human head, it is designed to operate at Industrial, Scientific and Medical ISM Band (2.4-2.4835 GHz). Rectangular and Circular shaped microstrip patch antennas with varying numbers of slots are constructed using FR-4 substrate having a permittivity of 4.3. To make a perfect replica of a human head, a six layered human head phantom model is designed which consists of six layers namely Skin, Fat, Skull, Dura, Cerebrospinal fluid (CSF) and Brain with proper dielectric properties. The performance of the designed antennas is evaluated by comparing various parameters such as Return loss, VSWR, Gain and Directivity. Specific Absorption Rate (SAR) value for the phantom head model is determined for antennas with and without tumor and the results are analyzed.