Study of radiation shielding materials on microstrip patch antenna for sustainability

Colaco, John; Lohani, Rajesh B.

doi:10.1016/j.matpr.2021.07.422

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Tungsten is recognized as an environmentally friendly alternative to lead for radiation shielding because of its comparable performance, making it an excellent choice for lightweight applications in devices, machinery, and clothing [7]. With an atomic number of 74, an atomic weight of 183.84 g/mol, and a density of 19.25 g/cm 3 , tungsten's shielding capabilities rival those of lead.…”

Section: Introductionmentioning

confidence: 99%

Medical-Radiation-Shielding Film Fabricated by Imitating the Layered Structure Pattern of Abalone Shell and Verification of Its Shielding Effect

Kim

2023

Materials

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Radiation-shielding clothing for medical workers must be light and thin, thus ensuring flexibility. However, controlling the thickness and weight is limited by shielding performance requirements. This study aims to improve shielding performance by considering a shielding structure that mimics the internal structure of an abalone shell. Two shields were produced: a sheet made with a carrier process using a liquid polymer and tungsten mixture, and a fillet made by compounding the same material and laminated using a heat-treatment press after the injection process. The tungsten content and thickness were the same at 85 wt% and 0.3 mm, respectively. In the high-energy region, the shielding film based on the laminated structure of abalone shells showed a shielding rate that was higher by more than 7%. Compared to that of a 0.3 mm lead plate, the shielding ratio of the shielding film was approximately 16% lower at 120 kVp, thereby confirming the radiation-shielding effect of the layered-structure shielding film. Therefore, it is concluded that the laminated structure of the shielding film, which is identical to the internal laminated structure of the abalone shell, expands the impact area of incident radiation and attenuates the energy intensity, thereby improving the medical-radiation-shielding performance.

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Section: Introductionmentioning

confidence: 99%

Medical-Radiation-Shielding Film Fabricated by Imitating the Layered Structure Pattern of Abalone Shell and Verification of Its Shielding Effect

Kim

2023

Materials

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“…The antenna covers a frequency range of 3-9 GHz with a maximum gain of 2.83 dBi. In another study [7], radiation shielding materials of copper, tungsten, lead and stainless steel are used in a microstrip patch antenna that resonates at 2.4 GHz and 26 GHz. By comparison of these materials, it is concluded that tungsten is a viable choice for the antenna structure and is more environmentally friendly compared to the other options.…”

Section: Introductionmentioning

confidence: 99%

Sustainable dual-band microstrip patch antenna with paper-based substrate and aluminum for multipoint distribution systems and WiMAX application

Dogusgen

2022

THERM SCI

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In this study, a microstrip patch antenna design with a U-shaped patch and a paper-based substrate is presented. Metallic parts such as the patch, ground plane and microstrip line feed are designed in aluminum. Utilization of recyclable paper and aluminum yields a sustainable and environmentally friendly design. The dual-band antenna operates between 1.950-2.125 GHz and 2.650-2.825 GHz with a bandwidth of 0.175 GHz for both frequency ranges. It is suitable for multipoint distribution systems (2.076-2.111 GHz) and WiMAX application (2.700-2.800 GHz). Monopolar radiation patterns are obtained for the operation frequencies of both frequency ranges. Maximum gain values are 5.009 dBi and 5.413 dBi for the operation frequencies of multipoint distribution systems and WiMAX application, respectively. While the antenna can be used indoors and outdoors, radome design is not considered in the structure. No parasitic elements or slots are included in the antenna. All simulations are carried out by using AN-SYS HFSS software package.

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“…We calculated SE according to the above Equations ( 3)-( 5) [15,[26][27][28][29], and the results are listed in Figure 10a. Obviously, as frequency increases, SEs of the two powder materials pre-and post-HMT increase as a result.…”

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confidence: 99%

Novel Silver-Plated Nickel-Coated Graphite Powder with Excellent Heat and Humidity Resistance: Facile Preparation and Performance Investigation

2022

Molecules

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Nickel-coated graphite (Ni/C) powder has many applications in diverse areas such as paint, print ink, adhesive, conductive rubber, and so on. To increase its stability in harsh environmental conditions, the electroless plating of silver film on Ni/C via ascorbic acid was studied. A silver layer with a thickness of 2.5 μm was successfully plated on Ni/C powder’s surface with an Ag loading of 44.35 wt.%. Silica gel blended with the Ag/Ni/C powder exhibited much higher conductivity under aging conditions of 85 °C and 85% RH for 1000 h than that with pristine Ni/C powder. Further tests showed that the conductivity of Ag/Ni/C powder remained almost unchanged even in an extremely humid and hot condition for 1000 h. Aging tests were carried out for Ag/Ni/C and Ni/C powders under long-term humid and hot conditions (85 °C, 85% RH), in which Ag/Ni/C samples showed much better electromagnetic shielding performance. Due to the excellent properties and reasonable price, the potential applications of Ag/Ni/C in conductive glue and electromagnetic shielding glue could be expected.

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Study of radiation shielding materials on microstrip patch antenna for sustainability

Cited by 4 publications

References 13 publications

Medical-Radiation-Shielding Film Fabricated by Imitating the Layered Structure Pattern of Abalone Shell and Verification of Its Shielding Effect

Medical-Radiation-Shielding Film Fabricated by Imitating the Layered Structure Pattern of Abalone Shell and Verification of Its Shielding Effect

Sustainable dual-band microstrip patch antenna with paper-based substrate and aluminum for multipoint distribution systems and WiMAX application

Novel Silver-Plated Nickel-Coated Graphite Powder with Excellent Heat and Humidity Resistance: Facile Preparation and Performance Investigation

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