Simplified two‐dimensional microwave imaging scheme using metamaterial‐loaded Vivaldi antenna

Johari, Esha; Akhter, Zubair; Bhaskar, Manoj; Akhtar, M. Jaleel

doi:10.1002/2015rs005935

Cited by 6 publications

(2 citation statements)

References 39 publications

(48 reference statements)

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“…This necessitates additional examinations to confirm cancer and higher expenses for the early diagnosis of breast cancer. A flexible wearable patch antenna with a jean substrate is proposed in [112]. This antenna operates at 5.8 GHz.…”

Section: Antennas For Microwave Imagingmentioning

confidence: 99%

Compact Flexible Planar Antennas for Biomedical Applications: Insight into Materials and Systems Design

Venkatachalam,

Jagadeesan,

Ismail

et al. 2023

Bioengineering

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Planar antennas have become an integral component in modern biomedical instruments owing to their compact structure, cost effectiveness, and light weight. These antennas are crucial in realizing medical systems such as body area networks, remote health monitoring, and microwave imaging systems. Antennas intended for the above applications should be conformal and fabricated using lightweight materials that are suitable for wear on the human body. Wearable antennas are intended to be placed on the human body to examine its health conditions. Hence, the performance of the antenna, such as its radiation characteristics across the operating frequency bands, should not be affected by human body proximity. This is achieved by selecting appropriate conformal materials whose characteristics remain stable under all environmental conditions. This paper aims to highlight the effects of human body proximity on wearable antenna performance. Additionally, this paper reviews the various types of flexible antennas proposed for biomedical applications. It describes the challenges in designing wearable antennas, the selection of a flexible material that is suitable for fabricating wearable antennas, and the relevant methods of fabrication. This paper also highlights the future directions in this rapidly growing field. Flexible antennas are the keystone for implementing next-generation wireless communication devices for health monitoring and health safety applications.

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Section: Antennas For Microwave Imagingmentioning

confidence: 99%

Compact Flexible Planar Antennas for Biomedical Applications: Insight into Materials and Systems Design

Venkatachalam,

Jagadeesan,

Ismail

et al. 2023

Bioengineering

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show abstract

“…The conventional spectral domain scattering coefficient‐based calibration technique has recently been combined with the effective time domain approach to minimize the effect of measurement error on the reconstructed image of the test area (Akhter & Akhtar, , ; Akhter et al, ; Johari et al, ). However, the systematic microwave calibration procedure conforming to the subsurface imaging topology has not been widely discussed in literature.…”

Section: Introductionmentioning

confidence: 99%

Microwave Nondestructive Imaging of Buried Objects Using Improved Scattered‐Field Calibration Technique

Govind

Akhtar

2018

Radio Science

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A novel microwave subsurface imaging scheme based on an improved electric field calibration technique is proposed in this paper. The proposed imaging scheme requires RF measurement system comprising of a uniform linear transmitter‐receiver antenna array wherein the region under examination is illuminated sequentially to measure the scattering parameters of the test. An appropriate imaging frequency is selected so as to minimize the errors introduced due to coupling among the coresident antennas. The electric field required for the imaging algorithm is obtained from the measured scattering parameters using the proposed calibration methodology in two subsequent steps. The first step of calibration removes the systematic errors inherent in the measured scattering parameters by using known standards such as a metal plate and absorber foam. The second calibration step transforms the calibrated scattering parameters of the test object into electric field values so as to use them in the required inverse reconstruction procedure. The transformation is based on comparison of the measured scattering parameters of a known specimen and test object under the same test environment. The imaging algorithm based on the electric field formulation uses the standard iterative distorted Born procedure. For determining the location of the buried object, a novel data interpretation scheme based on analysis of variance (ANOVA) applied to time domain reflection coefficients obtained from various antenna elements is also proposed here. The applicability including performance evaluation of the proposed imaging scheme is tested by retrieving microwave image of various standard objects buried inside sand.

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Metamaterial-FSS Antenna for Microwave Image Sensing

Raveendran

Raman

2022

Metamaterials Science and Technology

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Simplified two‐dimensional microwave imaging scheme using metamaterial‐loaded Vivaldi antenna

Cited by 6 publications

References 39 publications

Compact Flexible Planar Antennas for Biomedical Applications: Insight into Materials and Systems Design

Compact Flexible Planar Antennas for Biomedical Applications: Insight into Materials and Systems Design

Microwave Nondestructive Imaging of Buried Objects Using Improved Scattered‐Field Calibration Technique

Metamaterial-FSS Antenna for Microwave Image Sensing

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