A comparison study between horn and vivaldi antennas for 1.5–6 GHz breast microwave radar imaging

Nepote, Mario Solis; Herrera, Diego Rodriguez; Tapia, Daniel Flores; Latif, Saeed I.; Pistorius, Stephen

doi:10.1109/eucap.2014.6901692

Cited by 15 publications

(5 citation statements)

References 5 publications

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“…Although the attenuation increases with frequency and lower frequencies are desirable for antenna operation, several works have been proposed for the breast imaging system that increases penetration rate by applying field focusing technique at millimeterwave (mm-wave) frequencies [46,47]. Typically, 1-9 GHz band is used for microwave breast tumor detection purposes [22,[48][49][50]. Furthermore, to improve the system's matching and reduce unwanted reflections, antennas are typically designed inside a coupling medium, which can significantly alter the antenna behaviors.…”

Section: Antenna Designmentioning

confidence: 99%

A compact ultrawideband slotted patch antenna for early stage breast tumor detection applications

Salimitorkamani

Mehranpour

Odabasi

2022

Int. J. Microw. Wireless Technol.

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This paper presents a compact ultrawideband slotted patch antenna for early stage tumor detection applications using microwave breast imaging systems. In order to reduce any reflections between the antenna and breast, the antenna is designed and optimized inside a coupling medium with electrical properties similar to that of normal breast tissue as a coupling medium. The wideband performance of the antenna is obtained by adding a rectangular slit and L-shaped sleeves on the ground plane. While the added rectangular slit mainly improves the matching, the L-shaped sleeves improve both the matching and the bandwidth. The antenna operates from 0.9 to 9.6 GHz with a fractional bandwidth of ~165 $\%$ , providing a good penetration and resolution. In addition, the proposed antenna has a very compact size of 16 × 16 mm2. Furthermore, an antenna array consisting of 31 antennas is formed around a realistic breast phantom in the simulation environment to demonstrate the imaging of a spherical tumor with a diameter of 5 mm inside the breast. The results confirm that the proposed antenna can be used for early stage breast tumor detection purposes.

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Section: Antenna Designmentioning

confidence: 99%

A compact ultrawideband slotted patch antenna for early stage breast tumor detection applications

Salimitorkamani

Mehranpour

Odabasi

2022

Int. J. Microw. Wireless Technol.

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“…For instance, fatty tissue of healthy breast are transparent to microwave radiation compared to cancer cells containing more fluids due to lesions providing a higher lossy medium to the signal. Different antenna topologies have been established for improving the performance: [ 47 ] proposes a horn antenna operating in 1.5–6 GHz, UWB micro strip monopole antenna was proposed in [ 48 ] and a bow-tie antenna in [ 49 ].…”

Section: Radio Frequency Microwave Millimeter Wave and Terahertzmentioning

confidence: 99%

EM-Wave Biosensors: A Review of RF, Microwave, mm-Wave and Optical Sensing

Mehrotra

Chatterjee

Sen

2019

Sensors

149

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This article presents a broad review on optical, radio-frequency (RF), microwave (MW), millimeter wave (mmW) and terahertz (THz) biosensors. Biomatter-wave interaction modalities are considered over a wide range of frequencies and applications such as detection of cancer biomarkers, biotin, neurotransmitters and heart rate are presented in detail. By treating biological tissue as a dielectric substance, having a unique dielectric signature, it can be characterized by frequency dependent parameters such as permittivity and conductivity. By observing the unique permittivity spectrum, cancerous cells can be distinguished from healthy ones or by measuring the changes in permittivity, concentration of medically relevant biomolecules such as glucose, neurotransmitters, vitamins and proteins, ailments and abnormalities can be detected. In case of optical biosensors, any change in permittivity is transduced to a change in optical properties such as photoluminescence, interference pattern, reflection intensity and reflection angle through techniques like quantum dots, interferometry, surface enhanced raman scattering or surface plasmon resonance. Conversely, in case of RF, MW, mmW and THz biosensors, capacitive sensing is most commonly employed where changes in permittivity are reflected as changes in capacitance, through components like interdigitated electrodes, resonators and microstrip structures. In this paper, interactions of EM waves with biomatter are considered, with an emphasis on a clear demarcation of various modalities, their underlying principles and applications.

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“…The coaxial feed guides the energy through the lower ridge into the gap between the ridges, in a way that the outer conductor was connected to the lower ridge, and the inner conductor connected to the upper ridge. The proposed antenna matched 50 Ω at the feed to 377 Ω at the aperture of the antenna using the following impedance matching equations [12]- [13].…”

Section: Simulation Of Antenna Designmentioning

confidence: 99%

Sensitivity Analysis of a Portable Microwave Breast Cancer Detection System

Rana¹,

Nath²,

Pistorius³

2020

World Congress on Electrical Engineering and Computer Systems and Science

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A prototype portable breast microwave sensing (BMS) system for early breast cancer detection has been developed in our lab. In this paper, we provide preliminary results for the response of the antenna sensor array to a point scatterer, using both simulation and experiment. The portable system uses a horn antenna to transmit frequencies from 1.5 GHz to 6 GHz and a sensor array using thirteen patch antennas. The optimal separation of each antenna in the receiver array was calculated to be 4 mm based on an envelope correlation coefficient of 0.37. The BMS system, including the horn antenna, was designed in CST Microwave Studio to mimic the experimental setup. This study compares the E-field characteristics and DC voltages for each sensor, using simulation and experimental results, for both a free air system and with an Aluminum rod placed at different positions in the scanning plane. A 13×10 array of geometric correction constants was calculated from the simulated E-field. The range of difference between the simulated and experimental results was-4% to 3% for open space conditions and ±20% when an Aluminum rod was placed at different positions in the scanning plane. The preliminary results are promising and provide some insight as to where improvements must be made to enhance the detection ability of the portable system.

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A comparison study between horn and vivaldi antennas for 1.5–6 GHz breast microwave radar imaging

Cited by 15 publications

References 5 publications

A compact ultrawideband slotted patch antenna for early stage breast tumor detection applications

A compact ultrawideband slotted patch antenna for early stage breast tumor detection applications

EM-Wave Biosensors: A Review of RF, Microwave, mm-Wave and Optical Sensing

Sensitivity Analysis of a Portable Microwave Breast Cancer Detection System

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