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Keyword: Directivity
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Open AccessArticle
9 Pages, 997 KB Download PDF

Coupled Apodization Functions Applied to Enhance Image Quality in Ultrasound Imaging using Phased Arrays

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 5, Page # 149–157, 2021; DOI: 10.25046/aj060517
Abstract:

The remarkable presence of side lobes levels in ultrasound B-mode imaging significantly decreases the image quality. Therefore, the use of an apodization function is of great importance. Linear windowing functions are among the most efficient techniques used to optimize antenna directivity by suppression of the side lobes. However, the apodization causes the degradation of lateral…

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(This article belongs to Section Biomedical Engineering (EBI))
Open AccessArticle
6 Pages, 1,246 KB Download PDF

A Rectification Circuit with Co-Planar Waveguide Antenna for 2.45 GHz Energy Harvesting System

Advances in Science, Technology and Engineering Systems Journal, Volume 6, Issue 2, Page # 984–989, 2021; DOI: 10.25046/aj0602113
Abstract:

A new approach for designing RF energy harvester with a single stage converter circuit is presented in this paper. The proposed converter configuration is integrated with an antenna that is based on the coplanar waveguide (CPW) transmission line with improved gain resonated at 2.45 frequency ISM band. The CPW patch antenna as a harvester antenna…

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(This article belongs to the SP10 (Special Issue on Multidisciplinary Sciences and Engineering 2020-21) & Section Electronic Engineering (EEE))
Open AccessArticle
10 Pages, 1,288 KB Download PDF

Evaluation of Uncertainty Measurement Calculation for Vector Network Analyzer From 300 kHz to 8.5 GHz

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 3, Page # 01–10, 2020; DOI: 10.25046/aj050301
Abstract:

Increasing the telecommunications products that allow Vector Network Analyzer is becoming more common tools to measure the S-Parameter. It will be an absolute number from the S-Parameter measurements produced in real and imaginary, other words it is also known as the product of the calculation. The calculation findings do not include the systematic and random…

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(This article belongs to Section Manufacturing Engineering (EMF))
Open AccessArticle
7 Pages, 402 KB Download PDF

Antenna Radiation Performance Enhancement Using Metamaterial Filter for Vehicle to Vehicle Communications Applications

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 2, Page # 344–350, 2020; DOI: 10.25046/aj050245
Abstract:

In this work, an integrated metamaterial filter design in close proximity with monopole antenna is proposed for vehicular communication applications. A cylindrical screen formed by an array of metamaterial cells is designed to be reflective at 5.9 GHz in order to enhance antenna performance in intelligent vehicle transport systems. The unit cell proposed design based…

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(This article belongs to Section Telecommunications (TEL))
Open AccessArticle
6 Pages, 1,112 KB Download PDF

In Body Antenna for Monitoring and Controlling Pacemaker

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 2, Page # 74–79, 2020; DOI: 10.25046/aj050209
Abstract:

This paper is an extension of work originally presented in 2019 International Conference on Automation, Computational and Technology Management (ICACTM). A micro-strip patch in-body designed antenna is constructed on pacemaker to monitor and control the pacemaker wirelessly. The antenna is intended for ISM (Industrial, Scientific, and Medical) band (2.4 GHz to 2.48 GHz). A perfect…

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(This article belongs to the SP8 (Special Issue on Multidisciplinary Sciences and Engineering 2019-20) & Section Telecommunications (TEL))
Open AccessArticle
5 Pages, 1,012 KB Download PDF

Optimization of the Feeding Point Location of Rectangular Microstrip Patch Antenna

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 1, Page # 382–386, 2020; DOI: 10.25046/aj050149
Abstract:

Microstrip patch antennas (MPAs) are comfortable and have better anticipation compared to traditional antennas. Not only the weight of this type of antennas is lighter but also, they have little capacity, minimum price, reduced in measurement as well as affluence of fiction then observance. Recently, it has been many times reevaluated for the improvement of…

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(This article belongs to Section Electronic Engineering (EEE))
Open AccessArticle
10 Pages, 1,364 KB Download PDF

Effects of Split Ring Resonator (SRR) Metamaterial on the Radiation Pattern and Variation of the Heating Focus Point of the Microstrip Patch Antenna

Advances in Science, Technology and Engineering Systems Journal, Volume 5, Issue 1, Page # 307–316, 2020; DOI: 10.25046/aj050139
Abstract:

Metamaterial antennas are some sort of antennas which utilize metamaterials to improve the efficiency of small (small electrical) antenna systems and also enhance the antenna’s radiation pattern. The unusual properties of metamaterials such as coefficients of permittivity and permeability, as well as the negative refractive index, have led to increase the use of these artificial…

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(This article belongs to the SP8 (Special Issue on Multidisciplinary Sciences and Engineering 2019-20) & Section Telecommunications (TEL))
Open AccessArticle
8 Pages, 1,598 KB Download PDF

Measurement of the Bridge Surface Deflections Using Near-Field Amplitude of Secondary Radiators System

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 6, Page # 217–224, 2017; DOI: 10.25046/aj020626
Abstract:

In remote measurements on large-sized objects main focus is on measuring deformations of bridge surfaces and determination of the dynamic amplification factor in particular. The proposed method estimates deflections of entire lower surface of a bridge due to placement of secondary radiators on this surface. Antenna array directivity pattern (ADP) is distorted during deflection of…

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(This article belongs to the SP4 (Special issue on Advancement in Engineering Technology 2017-18) & Section Construction & Building Technology (CBT))
Open AccessArticle
5 Pages, 639 KB Download PDF

A Modified Patch Antenna with Square-Open Loop Resonator Slot for Improved Bandwidth Performance in WiFi Applications

Advances in Science, Technology and Engineering Systems Journal, Volume 2, Issue 3, Page # 1467–1471, 2017; DOI: 10.25046/aj0203183
Abstract:

A novel, modified square patch antenna with square open loop resonator slot, operating at 5.5 GHz, for improved bandwidth performance is proposed in this article. A complementary square open loop resonator is introduced on the patch to enhance the bandwidth more than twice that of the conventional square patch antenna operating at the same frequency.…

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(This article belongs to the SP3 (Special issue on Recent Advances in Engineering Systems 2017) & Section Telecommunications (TEL))

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