Research Article
Design and Optimization of a Miniaturized Antenna for Targeted Hyperthermia in Tumor Therapy
Issue:
Volume 13, Issue 1, June 2025
Pages:
1-7
Received:
23 May 2025
Accepted:
6 June 2025
Published:
18 June 2025
Abstract: Hyperthermia (HT) is a cancer treatment that involves applying heat to tumor tissues, often in combination with radiation or chemotherapy, to help inhibit tumor growth. Compact antennas will play a crucial role to facilitate localized heating by directing electromagnetic energy specifically to tumor regions. This article introduces a cost-effective, compact, and lightweight circular slot-shaped rectangular antenna (CSRA), a microstrip antenna designed for hyperthermia tumor treatment. It explores the use of hyperthermia as a treatment method, which, while effective, can cause overheating of surrounding healthy tissues, leading to the formation of hotspots. The antenna is modeled within a combined single-layer human tissue model and simulated using Ansys HFSS 2020R1 software. The compact (30 × 30 mm²) rectangular microstrip antenna operates at a resonant frequency of 2.4 GHz, offering a bandwidth of 40 kHz and a return loss of -20.8 dB. The Specific Absorption Rate (SAR) is calculated along the x-axis within the phantom at a 26.27 mm penetration depth, all of which comply with IEEE standards for safety and performance. Simulated results are validated through measurements and compared with recent literature. The findings, including the antenna's size and design, confirm that this slotted circular antenna is a promising candidate for microwave hyperthermia treatment of tumors.
Abstract: Hyperthermia (HT) is a cancer treatment that involves applying heat to tumor tissues, often in combination with radiation or chemotherapy, to help inhibit tumor growth. Compact antennas will play a crucial role to facilitate localized heating by directing electromagnetic energy specifically to tumor regions. This article introduces a cost-effective...
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Research Article
Analysis of S-band Parabolic Antenna Performance for Microsatellite Communication Systems
The Oo Lwin*,
Aung Ko Wynn
Issue:
Volume 13, Issue 1, June 2025
Pages:
8-14
Received:
1 June 2025
Accepted:
25 June 2025
Published:
28 July 2025
DOI:
10.11648/j.ajea.20251301.12
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Abstract: This report constitutes of, as the title for this paper, Analysis of S-band Parabolic Antenna Performance for Microsatellite Communication Systems. The objective of the paper is to build an intelligent antenna in order to receive with less noise signal transmitted by Microsatellite. It will be a challenging project since the distance of satellite from antenna is quite far with a lot of noise can affect the transmission process. Microsatellite missions enable innovative scientific experiments using a low-cost platform but are limited by their small size and available solar power. This imposes strict power budgets on radio links. Enhancing ground station antenna systems can improve communication margins by increasing forward gain, forward-to-backward ratio, and directivity, ultimately boosting link performance with the satellite. The purpose of this paper was to analyze the performance evaluation of parabolic reflector with horn feed antenna for communication with frequency operating between 2 GHz and 3 GHz Amateur S-band. Parabolic antennas serve as effective high-gain solutions for microsatellite communication. The far-field radiation pattern produced by a parabolic reflector is influenced by the feed element's radiation pattern and the specific type and dimensions of the reflector employed. In this study, the antenna system is designed and simulated in the CST Microwave Studio to achieve specific requirements which are minimum power reflected back to the source and maximum gain with minimum front-to-back ratio, VSWR and radiation pattern for the antenna system.
Abstract: This report constitutes of, as the title for this paper, Analysis of S-band Parabolic Antenna Performance for Microsatellite Communication Systems. The objective of the paper is to build an intelligent antenna in order to receive with less noise signal transmitted by Microsatellite. It will be a challenging project since the distance of satellite f...
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,
Azharuddin Khan
