An UWB Vivaldi antenna with the enhanced functionalities through the use of DGS and dielectric lens

Belen, Mehmet A.; Evranos, Ilhan Omer; Güneş, Filiz; Mahoutı, Peyman

doi:10.1109/rast.2017.8002989

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…The substrate used was RO4350, with a permittivity value of 3.48 and a thickness of 1.524mm [24]. RO 4350 was also selected as an antenna substrate in some recent research [18], [25].…”

Section: Microstrip Antenna and Breast Phantom Developmentmentioning

confidence: 99%

Heat distribution improvement with the implementation of polyethylene-covered water bolus into breast cancer hyperthermia

Wong,

Lias,

Basri

et al. 2023

J. Phys.: Conf. Ser.

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This paper presents the implementation of polyethylene-covered water bolus into a non-invasive breast cancer hyperthermia applicator. This modified hyperthermia applicator is introduced to improve the performance of hyperthermia by reducing or removing unwanted hotspots during hyperthermia treatment. This simulation-based experiment is carried out to observe the heating distribution of hyperthermia with water bolus coated by three different thicknesses of polyethylene cover or layer, which are 0.5mm, 0.8mm and 1.0mm. The solvent used in the water bolus is distilled water. The 915MHz microstrip antenna as a hyperthermia applicator and stage 2 breast cancer with a cancer depth of 28.6 mm to 73.6 mm is selected for this study. Based on the results, with the modified HTP integrated by water bolus, the heat pattern of hyperthermia simulation becomes more concentrated into the targeted cancer region, and unwanted hotspots nearby the skin area of breast tissue are removed. The 0.5mm thick polyethylene cover showed the best results with a focusing region between 29.4mm to 69.4mm compared with the result of hyperthermia without implemented water bolus, which heated the 26.6mm to 67.3mm region.

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“…The substrate used was RO4350, with a permittivity value of 3.48 and a thickness of 1.524mm [24]. RO 4350 was also selected as an antenna substrate in some recent research [18], [25].…”

Section: Microstrip Antenna and Breast Phantom Developmentmentioning

confidence: 99%

Heat distribution improvement with the implementation of polyethylene-covered water bolus into breast cancer hyperthermia

Wong,

Lias,

Basri

et al. 2023

J. Phys.: Conf. Ser.

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show abstract

“…But, one of the traditional Vivaldi antenna's drawbacks is its low directional property. Different researchers have suggested different techniques to improve its directivity such as arrays, 8 slots, 9 adding directors, 10 metamaterial lens, 11 or dielectric lens 7 . Antenna arrays can increase gain but this method needs a proper examination of mutual coupling and power division, which complicates the layout 8 .…”

Section: Introductionmentioning

confidence: 99%

A high gain and wide bandwidth Grooved AML loaded Vivaldi Antenna design for imaging and communication applications

Binzlekar

Sharma

Agarwal

2022

Micro & Optical Tech Letters

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In this paper, a Vivaldi antenna with a grooved, tapered slot loaded with an artificial material lens (AML) is designed and analyzed. The unique feature of the proposed antenna is to provide excellent gain (more than 5.0 dBi) over the entire ultra‐wide bandwidth within the compact area, i.e., 40 × 45 mm2. For improving the gain, symmetrical slot matrices were etched at the flare and AML unit cells were imprinted at the extended dielectric portion. Measured results confirm its operating frequency range from 4.65 to 12.65 GHz, having a peak gain of 9.2 dBi to a minimum of 5 dBi. As compared to conventional antenna, the proposed Vivaldi antenna shows an increase in gain of 2.2 dBi. Furthermore, time‐domain analysis suggests very good isolation (∼35 dB), linear phase response, and negligible group delay (∼1 ns). The compact size, wide bandwidth, good gain, stable radiation, and transient features make it a suitable choice for imaging, and communication applications.

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“…In order to miniaturize the size of the Vivaldi antenna and extend its bandwidth, various methods such as the corrugated Vivaldi antenna [ 5 ], elliptically shaped arm Vivaldi antenna [ 6 ], defected ground slot [ 7 ], and tapered slot edge [ 8 ] have been proposed. Additionally, some structures are placed in front of antenna such as parasitic element [ 9 ], elliptical cylinder [ 10 ], or two-stub-loaded split-ring resonator [ 7 ] to enhance antenna gain.…”

Section: Introductionmentioning

confidence: 99%

Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors

Seo

Kim

2020

Sensors

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A microstrip-to-slot line-fed miniaturized Vivaldi antenna using semicircular patch embedment is proposed in this study. The conventional Vivaldi antenna has ultrawide bandwidth, but suffers from low gain in the low-frequency band. The proposed antenna topology incorporates the embedment of semicircular patch elements into the side edge of the antenna. This enables the phases of electric fields at both ends of the antenna to be out of phase. Since the distance between the two ends are λL/2 where λL is the wavelength at a low operating frequency, this antenna topology can achieve the constructive addition of electrical fields at the radiating end, leading to gain enhancement at the chosen low frequency. In comparison with the conventional Vivaldi antenna, the proposed antenna has a wider bandwidth from 2.84 to 9.83 GHz. Moreover, the simulated result shows a gain enhancement of 5 dB at low frequency. This cannot be realized by the conventional low-band impedance matching techniques only relying on slotted topologies. The measured results of this proposed antenna with a size of 45 × 40 × 0.8 mm3 are in good agreement with the simulated results.

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An UWB Vivaldi antenna with the enhanced functionalities through the use of DGS and dielectric lens

Cited by 8 publications

References 6 publications

Heat distribution improvement with the implementation of polyethylene-covered water bolus into breast cancer hyperthermia

Heat distribution improvement with the implementation of polyethylene-covered water bolus into breast cancer hyperthermia

A high gain and wide bandwidth Grooved AML loaded Vivaldi Antenna design for imaging and communication applications

Semicircular Patch-Embedded Vivaldi Antenna for Miniaturized UWB Radar Sensors

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