Design of a Compact Slot Antenna Array for Hyperthermia Treatment in Noncentral Breast Cancer Therapy.
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| Title: | Design of a Compact Slot Antenna Array for Hyperthermia Treatment in Noncentral Breast Cancer Therapy. |
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| Authors: | Hemmati, Zahra1 (AUTHOR), Kazemi, Robab1 (AUTHOR) r.kazemi@tabrizu.ac.ir, Sharma, Madan Kumar1 (AUTHOR) |
| Source: | International Journal of Antennas & Propagation. 11/17/2025, Vol. 2025, p1-15. 15p. |
| Subjects: | Breast cancer, Thermotherapy, Electromagnetic waves, Conformal antennas, Cancer treatment, Antenna design |
| Abstract: | This paper presents a compact conformal antenna for breast cancer hyperthermia treatment. The design integrates two rectangular patches within a slot and a fork‐shaped feedline, achieving over 50% bandwidth. Its conformal geometry adapts to tissue contours, improving treatment efficiency. To optimize electromagnetic (EM) power delivery to tumors while reducing undesired back radiation toward the operator, the design incorporates a hemispherical reflector and a neoprene layer at the back of the antenna for effective reflection and absorption. Additionally, a water bolus is utilized between the antenna and the skin to prevent hotspot formation. Operating at 2.45 GHz, the antenna measures 18 × 12 mm (0.15λ0 × 0.1λ0), making it over 50% smaller than conventional patch antennas, and maintains stable performance despite tissue property variations. The antenna effectively targets deep‐seated tumors while minimizing skin heating. Its compactness supports array configurations for improved penetration and off‐center tumor targeting through phase control. Performance evaluation of single and multielement arrays—considering reflection coefficient, SAR, penetration depth (PD), effective field size (EFS), and time–temperature response—shows that the single element achieves a PD of 21.15 mm and EFS of ∼119 mm2. Arrays with 3, 5, and 7 elements further enhance PD and EFS, confirming the antenna's potential for efficient, localized, and safe hyperthermia therapy. By applying appropriate phase differences between array elements, tumors located up to 50° from the tissue center can be effectively treated without repositioning the applicator or patient. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | This paper presents a compact conformal antenna for breast cancer hyperthermia treatment. The design integrates two rectangular patches within a slot and a fork‐shaped feedline, achieving over 50% bandwidth. Its conformal geometry adapts to tissue contours, improving treatment efficiency. To optimize electromagnetic (EM) power delivery to tumors while reducing undesired back radiation toward the operator, the design incorporates a hemispherical reflector and a neoprene layer at the back of the antenna for effective reflection and absorption. Additionally, a water bolus is utilized between the antenna and the skin to prevent hotspot formation. Operating at 2.45 GHz, the antenna measures 18 × 12 mm (0.15λ0 × 0.1λ0), making it over 50% smaller than conventional patch antennas, and maintains stable performance despite tissue property variations. The antenna effectively targets deep‐seated tumors while minimizing skin heating. Its compactness supports array configurations for improved penetration and off‐center tumor targeting through phase control. Performance evaluation of single and multielement arrays—considering reflection coefficient, SAR, penetration depth (PD), effective field size (EFS), and time–temperature response—shows that the single element achieves a PD of 21.15 mm and EFS of ∼119 mm2. Arrays with 3, 5, and 7 elements further enhance PD and EFS, confirming the antenna's potential for efficient, localized, and safe hyperthermia therapy. By applying appropriate phase differences between array elements, tumors located up to 50° from the tissue center can be effectively treated without repositioning the applicator or patient. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 16875869 |
| DOI: | 10.1155/ijap/5591535 |
