A printed compact UWB Vivaldi antenna with hemi cylindrical slots and directors for microwave imaging applications

Guruswamy, Swathiga; Chinniah, Ramya; Kesavamurthy, T.

doi:10.1016/j.aeue.2019.152870

Cited by 28 publications

(14 citation statements)

References 20 publications

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“…The antennas have been designed as a modified version of the common Vivaldi printed antennas, aiming at a reduced size. Vivaldi-like antennas are one of the most-used broadband antenna designs in the literature [ 25 , 26 ]. Their main advantages are having a slightly directive radiation pattern in the aperture direction and showing a logarithmic profile which allows for a considerably broad bandwidth (only limited by the matching in the antenna feed).…”

Section: Microwave System For Early Detection Of Breast Tumoursmentioning

confidence: 99%

Non-Invasive Microwave-Based Imaging System for Early Detection of Breast Tumours

et al. 2022

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This work introduces a microwave-based system able to detect tumours in breast phantoms in a non-invasive way. The data acquisition system is composed of a hardware system which involves high-frequency components (antennas, switches and cables), a microcontroller, a vector network analyser used as measurement instrument and a computer devoted to the control and automation of the operation of the system. Concerning the software system, the computer runs a Python script which is in charge of mastering and automatising all the required stages for the data acquisition, from initialisation of the hardware system to performing and saving the measurements. We also report on the design of the high-performance broadband antenna used to carry out the measurements, as well as on the algorithm employed to build the final medical images, based on an adapted version of the so-called Improved Delay-and-Sum (IDAS) algorithm improved by a Hamming window filter and averaging preprocessing. The calibration and start-up of the system are also described. The experimental validation includes the use of different tumour models with different dielectric properties inside the breast phantom. The results show promising tumour detection capabilities, even when there is low dielectric contrast between the tumoural and healthy tissues, as is the usual case for dense breasts in young women.

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Section: Microwave System For Early Detection Of Breast Tumoursmentioning

confidence: 99%

Non-Invasive Microwave-Based Imaging System for Early Detection of Breast Tumours

et al. 2022

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“…The final design was able to operate in the frequency range of 1.54 to 7 GHz with a radiation efficiency of 92%. Hemi-cylindrical slots were introduced to a Vivaldi antenna in [108], allowing to improve the antenna gain, front-to-back ratio (FBR), impedance matching, and cross-polarization discrimination (XPD). The proposed design was able to operate in the range of 2.9 to more than 9 GHz with a peak gain of 9.5 dBi while maintaining a size of 49 × 48.5 × 0.8 mm 3 .…”

Section: ) Vivaldi Antenna A: Side Slotsmentioning

confidence: 99%

“…Content may change prior to final publication. [107] Side Slotted Vivaldi Antenna [108] Hemi-cylindrical Slotted Vivaldi [109] ALTSA [111] AVA with Rectangular Slits [110] AVA with Periodic Slit Edge [112] AVA with Regular Slot Edges (RSE-AVA) [113] AVA with Exponential Slot Edges (ESE-AVA) [115] AVA with Tapered Slot Edge (TSE-AVA) [114] ESE-BAVA [125] TEM Horn Antenna Table. 5 summarizes the different investigated antennas with enhanced radiation characteristics.…”

Section: ) Horn Antennas A: Dielectric Shieldingmentioning

confidence: 99%

“…Content may change prior to final publication. [68] DETSA × × [69] Resistively Loaded Vivaldi Antenna × × × [70] Slot Loaded Vivaldi Antenna × × × [71] Fern Fractal Leaf AVA × × × [99] AVA [100] Tapered Slot AVA [101] Tapered Slot AVA [102] Corrugated Tapered Slot AVA × × [103] Corrugated Tapered Slot AVA × × [104] AVA × × [107] Side Slotted Vivaldi Antenna × × × × [108] Hemi-cylindrical Slotted Vivaldi × × × × [109] ALTSA × × × [111] AVA with Rectangular Slits × [110] AVA with Periodic Slit Edge × [112] RSE-AVA × × × [113] ESE-AVA × × [115] TSE-AVA × × [114] ESE-BAVA × × × [116] DL-BAVA × × × [117] Modified BAVA × × × [118] Cavity-Backed Vivaldi Antenna × × × [74] Square Monopole Antenna × × [75] Square Monopole with Slits and π-shaped Parasitic Structure [76] Square Monopole with T-shaped Notch [77] Square Monopole with T-shaped Slots [78] Square Monopole with E-shaped Slots [79] Square Monopole with L-shaped Slits [80] Rectangular Monopole with L-shaped Slots [81] Square Monopole with E-shaped and T-shaped Slits [82] Monopole with Loop-Sleeve Ground Structure [83] Ground-Notched Triangular Monopole [84] Ground-Slotted Elliptical Monopole with Oriented Slots Ground-Slotted Elliptical Monopole with Vertical Slots [85] Shorted Planar Hexagonal Antenna [86] CPW-fed Square Monopole × × × [87] MOSUMMA × × [119] Monopole with Parabolic-Shaped Ground Plane...…”

Section: B Antenna Array Configurationsmentioning

confidence: 99%

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A Survey on Antenna Designs for Breast Cancer Detection Using Microwave Imaging

et al. 2020

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With the prevalence of breast cancer among women and the shortcomings of conventional techniques in detecting breast cancer at its early stages, microwave breast imaging has been an active area of research and has gained momentum over the past few years, mainly due to the advantages and improved detection rates it has to offer. To achieve this outcome, specifically designed antennas are needed to satisfy the needs of such systems where an antenna array is typically used. These antennas need to comply with several criteria to make them suitable for such applications, which most importantly include bandwidth, size, design complexity, and cost of manufacturing. Many works in the literature proposed antennas designed to meet these criteria, but no works have classified and evaluated these antennas for the use in microwave breast imaging. This paper presents a comprehensive study of the different array configurations proposed for microwave breast imaging, with a thorough investigation of the antenna elements proposed to be used with these systems, classified per antenna type, and per the improvements that concern the operational bandwidth, the size of the antenna, the radiation characteristics, and the techniques used to achieve the improvement. At the end of the investigation, a qualitative evaluation of the antenna designs is presented, providing a comparison between the investigated antennas, and determining whether a design is suitable or not to be used in antenna arrays for microwave breast imaging, based on the performance of each. An evaluation of the investigated arrays is also presented, where the advantages and limitations of each array configuration are discussed.

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“…Ultra-wideband (UWB) antennas have been used in various applications over the last years [1]- [4]. Military applications, such as phased array radars, direction finding systems, and see-through-wall imaging radars, benefit UWB antennas [5], [6]. Among the most popular UWB radiators is the tapered slot antenna (TSA) with its various profiles, including the exponential taper profile, first proposed in [7], and well-known as Vivaldi antenna [8].…”

Section: Introductionmentioning

confidence: 99%