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<p>A metamaterial sensor is developed for sub-THz applications with high sensitivity and Q-factor based on a coupled configuration. This design consists of two separate layers: a transmission line (TL) with a central gap as the primary component. In the second layer, there is a dual-ring element that is recognized to be a resonator above the first layer, as it is coupled with TL. To enhance the Q-factor up to 399, a grating structure is incorporated as a slow-wave element within the dual-ring setup. Furthermore, a parametric analysis has been conducted to optimize the structural parameters for improved performance. The sensor’s behavior is modeled using a circuit-based approach and compared with full-wave simulations obtained through the Finite Element Method (FEM) by HFSS. The cancer and healthy tissues of breast and skin cells, based on the second-order Debye model, are used as the material under test (MUT). The overall average sensitivity of the proposed sensor is 5.3%, indicating the sensor’s high potential for high-accuracy THz sensing.</p>

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Implement slow-wave unit cell as sub-terahertz sensor for cancer detection

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Zahra Sadat Tabatabaeian

摘要

A metamaterial sensor is developed for sub-THz applications with high sensitivity and Q-factor based on a coupled configuration. This design consists of two separate layers: a transmission line (TL) with a central gap as the primary component. In the second layer, there is a dual-ring element that is recognized to be a resonator above the first layer, as it is coupled with TL. To enhance the Q-factor up to 399, a grating structure is incorporated as a slow-wave element within the dual-ring setup. Furthermore, a parametric analysis has been conducted to optimize the structural parameters for improved performance. The sensor’s behavior is modeled using a circuit-based approach and compared with full-wave simulations obtained through the Finite Element Method (FEM) by HFSS. The cancer and healthy tissues of breast and skin cells, based on the second-order Debye model, are used as the material under test (MUT). The overall average sensitivity of the proposed sensor is 5.3%, indicating the sensor’s high potential for high-accuracy THz sensing.