Compact and wideband wide-slot antenna for microwave imaging system

Abstract Globally, breast cancer is a major reason for female mortality. Due to the limitations of current clinical imaging, the researchers are encouraged to explore alternative and complementary tools to available techniques to detect the breast tumor in an earlier stage. This article outlines a new, portable, and low-cost microwave imaging (MWI) system using an iterative enhancing technique for breast imaging. A compact side slotted tapered slot antenna is designed for microwave imaging. The radiating fins of tapered slot antenna are modified by etching nine rectangular side slots. The irregular slots on the radiating fins enhance the electrical length as well as produce strong directive radiation due to the suppression of induced surface currents that radiate vertically at the outer edges of the radiating arms with end-fire direction. It has remarkable effects on efficiency and gain. With the addition of slots, the side-lobe levels are reduced, the gain of the main-lobe is increased and corrects the squint effects simultaneously, thus improving the characteristics of the radiation. For experimental validation, a heterogeneous breast phantom was developed that contains dielectric properties identical to real breast tissues with the inclusion of tumors. An alternative PC controlled and microcontroller-based mechanical MWI system is designed and developed to collect the antenna scattering signal. The radiated backscattered signals from the targeted area of the human body are analyzed to reveal the changes in dielectric properties in tissues. The dielectric constants of tumorous cells are higher than that of normal tissues due to their higher water content. The remarkable deviation of the scattered field is processed by using newly proposed Iteratively Corrected Delay and Sum (IC-DAS) algorithm and the reconstruction of the image of the phantom interior is done. The developed UWB (Ultra-Wideband) antenna based MWI has been able to perform the detection of tumorous cells in breast phantom that can pave the way to saving lives.

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A Microwave Imaging System for the Detection of Targets Hidden behind Dielectric Walls

2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science ◽

10.23919/ursigass49373.2020.9232008 ◽

2020 ◽

Author(s):

Renato Cicchetti ◽

Valentina Cicchetti ◽

Sandra Costanzo ◽

Paolo D'Atanasio ◽

Alessandro Fedeli ◽

...

Keyword(s):

Imaging System ◽

Microwave Imaging

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Wideband-Narrowband Switchable Tapered Slot Antenna for Breast Cancer Diagnosis and Treatment

Applied Sciences ◽

10.3390/app11083606 ◽

2021 ◽

Vol 11 (8) ◽

pp. 3606

Author(s):

Seonho Lim ◽

Young Joong Yoon

Keyword(s):

Breast Cancer ◽

Coupling Effect ◽

Breast Cancer Diagnosis ◽

Microwave Imaging ◽

Ultra Wideband ◽

Slot Antenna ◽

Pin Diode ◽

Time Frequency ◽

Switching Mode ◽

Meander Line

In this paper, a wideband-narrowband switchable tapered slot antenna (TSA) with a compact meander line resonator for an integrated microwave imaging and hyperthermia system was proposed. A compact meander line resonator, which exhibited band-pass characteristics and provided narrowband characteristics by using one PIN diode, was fabricated beneath the tapered slot of the wideband TSA to minimize the degradation of the wideband characteristics. Moreover, the electromagnetic energy was transferred to the meander line resonator with a coupling effect to ensure effective frequency switching. By adapting a PIN diode on the meander line resonator, frequency switching could be achieved. In this way, the proposed antenna could operate in a real-time frequency switching mode between the ultra-wideband (UWB; 3.1~10 GHz), which is used for microwave imaging, and the 2.45 GHz band (industrial, scientific, and medical, ISM band), which is used for microwave hyperthermia. Frequency and time-domain results proved the applicability of the proposed antenna to an integrated breast cancer detection and treatment system.

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Microwave Imaging System for Soft Tissue Imaging of Cancer Patients

2021 IEEE 21st Annual Wireless and Microwave Technology Conference (WAMICON) ◽

10.1109/wamicon47156.2021.9443581 ◽

2021 ◽

Author(s):

Nesreen Alsbou ◽

Kyle Espinosa ◽

Nathaniel Ashley ◽

Nathan Wickware ◽

Imad Ali

Keyword(s):

Soft Tissue ◽

Cancer Patients ◽

Imaging System ◽

Microwave Imaging ◽

Tissue Imaging

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Microwave Imaging of Breast Skin Utilizing Elliptical UWB Antenna and Reverse Problems Algorithm

Micromachines ◽

10.3390/mi12060647 ◽

2021 ◽

Vol 12 (6) ◽

pp. 647

Author(s):

Sameer Alani ◽

Zahriladha Zakaria ◽

Tale Saeidi ◽

Asmala Ahmad ◽

Muhammad Ali Imran ◽

...

Keyword(s):

Skin Cancer ◽

Imaging System ◽

Signal Transmission ◽

Similarity Index ◽

Structural Similarity ◽

Microwave Imaging ◽

Ultra Wideband ◽

Uwb Antenna ◽

System A ◽

High Structural Similarity

Skin cancer is one of the most widespread and fast growing of all kinds of cancer since it affects the human body easily due to exposure to the Sun’s rays. Microwave imaging has shown better outcomes with higher resolution, faster processing time, mobility, and less cutter and artifact effects. A miniaturized elliptical ultra-wideband (UWB) antenna and its semi-spherical array arrangement were used for signal transmission and reception from the defected locations in the breast skin. Several conditions such as various arrays of three, six, and nine antenna elements, smaller tumor, multi-tumors, and skin on a larger breast sample of 30 cm were considered. To assess the ability of the system, a breast shape container with a diameter of 130 mm and height of 60 mm was 3D printed and then filled with fabricated skin and breast fat to perform the experimental investigation. An improved modified time-reversal algorithm (IMTR) was used to recreate 2D images of tumors with the smallest radius of 1.75 mm in any location within the breast skin. The reconstructed images using both simulated and experimental data verified that the system can be a reliable imaging system for skin cancer diagnosis having a high structural similarity index and resolution.

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