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<p>The objective of the present study is to develop a low-cost ultra-wide band (UWB) biosensor system that uses monostatic radar-based microwave imaging (RBMI) to find malignant cells in the human skull. The proposed imaging setup consists of a UWB antenna having a total volumetric size of 9 × 12.7 × 1.6 mm<sup>3</sup>. In addition, a&#xa0;square-shaped split ring unit cell with a total size of 13 × 14 × 1.6 mm<sup>3</sup>, which is working as a superstrate is designed to enhance the UWB antenna’s radiation capability toward the target. The performance of the lens applicator assembly (UWB antenna with superstrate cell) is evaluated in the context of backscattered <i>S</i><sub>11</sub> parameters, penetration depth and specific absorption rate (SAR). The proposed lens applicator operates from 4 to 11.3 GHz. By adjusting the lens applicator at 10 mm from the head phantom, the measured reflection signals are collected with the help of a vector network analyzer, and these backscattered signals are then subjected to signal processing by a ground-penetrating radar algorithm, allowing for the depth localization of the tumor in the human head. Furthermore, the proposed lens applicator’s SAR is 0.278 W/kg across 1 g of head tissue, which is also within the&#xa0;permitted range&#xa0;by Federal Communications Commission (FCC) regulations.</p>

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Development and performance analysis of a UWB lens applicator for detection and depth localization of brain tumor using microwave imaging technique

  • 期刊论文

  • 发表日期：

    2025年7月18日

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  • Priyanka Grover,
  • Hari Shankar Singh,
  • Sanjay Kumar Sahu

摘要

The objective of the present study is to develop a low-cost ultra-wide band (UWB) biosensor system that uses monostatic radar-based microwave imaging (RBMI) to find malignant cells in the human skull. The proposed imaging setup consists of a UWB antenna having a total volumetric size of 9 × 12.7 × 1.6 mm3. In addition, a square-shaped split ring unit cell with a total size of 13 × 14 × 1.6 mm3, which is working as a superstrate is designed to enhance the UWB antenna’s radiation capability toward the target. The performance of the lens applicator assembly (UWB antenna with superstrate cell) is evaluated in the context of backscattered S11 parameters, penetration depth and specific absorption rate (SAR). The proposed lens applicator operates from 4 to 11.3 GHz. By adjusting the lens applicator at 10 mm from the head phantom, the measured reflection signals are collected with the help of a vector network analyzer, and these backscattered signals are then subjected to signal processing by a ground-penetrating radar algorithm, allowing for the depth localization of the tumor in the human head. Furthermore, the proposed lens applicator’s SAR is 0.278 W/kg across 1 g of head tissue, which is also within the permitted range by Federal Communications Commission (FCC) regulations.