A slotted plus-shaped antenna with a DGS for 5G Sub-6 GHz/WiMAX applications

A slotted plus-shaped patch antenna (PSPA) with defected ground structure (DGS) is modelled and proposed for 5G Sub-6 GHz and WiMAX applications by using computer simulation technology (CST) MWS suite. The PSPA incorporates a rectangular slotted plus-shaped metal patch and a DGS. The PSPA is designed on a Rogers RT5880 (lossy) substrate with a compact dimension of 20 x 35 x 0.79 mm3. Its reflection coefficient is -52.06 dB resonating at 3.12 GHz and operates over a wider bandwidth of 2.56 GHz (2.67-5.23 GHz) to accommodate suitable Sub-6 GHz bands. The PSPA has a good gain (2.44 dB), directivity (2.53 dBi), and VSWR (1.005) at 3.12 GHz with omnidirectional radiation characteristics. The maximum efficiency of the proposed PSPA is about 98% for almost loss free power radiation. The apex of estimated gain and directivity are 4.65 dB and 4.95 dBi. The impact of different physical parameters on the antenna performance has also been studied and analysed in this paper. Initially, the proposed PSPA has been investigated by using time domain (TD) solver of CST then again it is buttressed by applying frequency domain (FD) solver of CST. Furthermore, the design has also been verified by high-frequency structure simulator (HFSS) as well as FEKO (a computational electromagnetics software). All the simulators show a very good agreement in results. 2022 The Author(s)The publication of this article was funded by Qatar National Library.Scopu

<span style="font-size:11.0pt;font-family: "Times New Roman","serif";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Evaluation of<i> </i><i><span style="font-size:11.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Mangal; mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language:HI" lang="EN-GB">Justicia adhatoda </span></i><span style="font-size:11.0pt;mso-bidi-font-size:14.0pt;font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:Mangal; mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language:HI" lang="EN-GB">L. syn. <i><span style="font-size:11.0pt;font-family: "Times New Roman","serif";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI" lang="EN-GB">Adhatoda vasica</span></i><span style="font-size:11.0pt; font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:HI" lang="EN-GB"> Nees extract by major metabolite analysis</span></span></span>

637-642<span style="font-size:11.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">The present study reveals an improved method for the evaluation of Adhatoda vasica extract by quantitation of major metabolite vasicine. The plant powder was extracted with methanol and evaporated in vaccuo to obtain an oily residue. The residue was diluted with aqueous solution of citric acid (1%) and was further extracted with chloroform. The preliminary screening for alkaloid was done with alkaloidal reagents and the presence of vasicine was assessed by thin layer chromatography (TLC). The extractive was then subjected to column chromatography using a mixture of ethyl acetate and methanol adjusted to pH 9.5 with liquid ammonia as mobile phase. The TLC chromatograms of the collected column fractions were developed and the fractions indicated the presences of vasicine were combined together. The residue obtained from evaporation of solvent was subjected to preparative TLC along with reference standard to get pure crystalline vasicine. The compound vasicine was ascertained by UV-Vis, FT-IR and LCMS/MS analyses. The quantitative estimation of vasicine was carried out by reversed phase HPLC method. About 99.50% of pure vasicine (647 mg) compared to reference standard was obtained from 250 gm of leaf powder (0.2588% w/w).</span

Proceedings of the 6th International Conference on Modeling and Simulation in Civil Engineering

This conference proceedings contains articles on the various research ideas of the academic community and technical researchers presented at the 6th International Conference on Modeling and Simulation in Civil Engineering (ICMSC 2022). ICMSC 2022 was organized by the Department of Civil Engineering, TKM College of Engineering, Kollam, Kerala, India on December 1-3, 2022. The main aim of this conference is to bring together leading academicians, researchers, technocrats, practitioners, and students to exchange and share their experiences and research outputs on all aspects of Civil Engineering, especially related to the modeling and simulation in Civil Engineering.  Conference Title: 6th International Conference on Modeling and Simulation in Civil EngineeringConference Acronym:  ICMSC 2022Conference Date: 1-3 December 2022Conference Location: IndiaConference Organizer: Department of Civil Engineering, TKM College of Engineering, Kollam, Kerala, Indi