Shabrina, Nabila Husna
Universitas Multimedia Nusantara

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Literature Review: Metode Komputasi Numerik untuk Analisis Gelombang Elektromagnetik Shabrina, Nabila Husna
Ultima Computing : Jurnal Sistem Komputer Vol 9 No 2 (2017): Ultima Computing : Jurnal Sistem Komputer
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1514.951 KB) | DOI: 10.31937/sk.v9i2.699

Abstract

This paper reviews the conceptual background and some application of numerical computational method for electromagnetic waves. In this literature review, our discussion is limited to Finite Element Method (FEM), Finite Difference Time Domain (FDTD) Method, and Method of Moment (MoM). Definition and characteristic of each method is explained, including the theoretical principles along with strength and weakness for every method. The method for solving electromagnetic problems can be selected based on the object’s shape, researcher’s domain concerned, and Maxwell equation associated with the problem. By reading this paper, readers will not only grasp the theoretical explanation but also gain the big picture of each numerical computational method. Indeks Terms— FEM, FDTD, MoM, Numerical Computational Method
Simulation of Digital Radio Mondiale (DRM) Coverage Prediction – A study case with Radio Republik Indonesia (RRI) Shabrina, Nabila Husna
IJNMT (International Journal of New Media Technology) Vol 4 No 1 (2017): IJNMT International Journal of New Media Technology
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/ijnmt.v4i1.535

Abstract

In this paper, DRM is applied for simulating coverage prediction in Radio Republik Indonesia (RRI). The proposed method is developed by simulating high frequency propagation from RRI Pro 3 transmitter with VOACAP online software. The simulation is undertaken in some different conditions. The variation of antenna type and transmitter power are observed in the simulation. The time of propagation also discussed to predict the coverage. The result shows that the variation of parameter influences the coverage result of DRM propagation in HF band. Changing the antenna type and time of propagation will make impact in the range of coverage while adding power transmitter gives insignificantly effect to the range of coverage. Keywords—DRM, Prediction Coverage, VOACAP REFERENCES [1] ITU R-REP-BS.2144-2009-PDF-E, “Planning parameters and coverage for Digital Radio Mondiale (DRM) broadcasting at frequencies below 30 MHz”, 2009. [2] M. J. Bradley, “Digital Radio Mondiale: System and Receivers”,Roke Manor Research Ltd, UK, 2003 [3] G. Prieto, I. Pichel, D. Guerra, P. Angueira, J.M. Matias, J.L. Ordiales, A. Arrinda, “Digital Radio Mondiale: Broadcasting and Reception”, IEEE Press, 2004. [4] DRM Features, available under http://www.drm.org [5] “Digital Radio Mondiale (DRM); System Specification,” European Telecommunication Standards Institute (ETSI), ETSI TS 101980, 2001. [6] D. Setiawan, “Alokasi Frekuensi, Kebijakan dan Perencanaan Spektrum Indonesia”, Departemen Komunikasi dan Informatika, 2010. [7] P.A Bradley, Th Dambold, P.Suessmann, “Propagation model for HF Radio Service Planning”, HF Radio Systems and Techniques, Conference Publication No 474 0 IEE, 2000. [8] J.J. Carr, “Practical Antenna Handbook 4th Edition”, McGraw Hill, 1990. [9] J.M Matias et al, “DRM (Digital Radio Mondiale) Local Coverage Tests Using the 26 Mhz Broadcasting Band”, IEEE Transactions on Broadcasting, Vol. 53, No. 1, August 2007. [10] C. A. Balanis, “Antenna Theory Analysis and Design”, 2nd ed, John Wiley & Sons, 2005. [11] Keputusan Direktorat Jendral Pos dan Telekomunikasi Nomor 85/DIRJEN/1999, “Spesifikasi Teknis Perangkat Telekomunikasi, Persyaratan Teknis Perangkat Radio Siaran”, Jakarta, 1999.
Penggunaan Metode FDTD untuk Analisis Gelombang pada Struktur Berbasis Kartesian dan Silinder Shabrina, Nabila Husna; Nusantara, Hardi; Munir, Achmad
Jurnal Nasional Teknik Elektro dan Teknologi Informasi (JNTETI) Vol 7, No 3 (2018)
Publisher : Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1551.975 KB) | DOI: 10.22146/jnteti.v7i3.442

Abstract

In this paper, the comparison of wave characteristics between Cartesian and cylindrical coordinate system–based structures was analyzed using finite-difference time-domain (FDTD) method. The use of FDTD method was considered due to its advantage in solving electromagnetics (EM) problems in wide spectrum of frequency and geometry shapes. The analysis was undertaken for three-dimensions (3D) Cartesian and cylindrical coordinate system–based structures with dimension of ???????? = 600 mm, ???????? = 300 mm, ???????? = 1,200 mm, and ???????? = 600 mm, ???? =1 °, ???????? = 1,200 mm, respectively. A transverse electric (TE) mode excitation of sine wave modulated Gaussian pulse with frequency of 1 GHz was applied for exciting both structures with the direction of propagation wave assumed in ????????–axis. Some scenarios were applied for both structures conditioned with free space, dielectric, and conductive medium. The attenuation rate obtained from three modelling scenarios in Cartesian coordinate system structures were 0.35 Np/m, 0.24 Np/m, and 0.62 Np/m, respectively. Meanwhile the attenuation rates for cylindrical coordinate system structure were 0.35 Np/m, 0.21 Np/m, and 0.40 Np/m. The simulation result for resonant frequency in Cartesian and cylindrical coordinate system structure conditioned with free space were 558.706 MHz and 498.466 MHz, respectively. The resonant frequency obtained from simulation result in Cartesian and cylindrical coordinate system structure conditioned with dielectric medium was similar with the one from theoretical calculation in which the highest error were 2.03% and 0.73%, respectively.
Analisis Pola Radiasi Antena Dipole pada aplikasi Wireless Sensor Networks di Industrial Site Shabrina, Nabila Husna; Samuel, Samuel
Ultima Computing : Jurnal Sistem Komputer Vol 10 No 2 (2018): Ultima Computing : Jurnal Sistem Komputer
Publisher : Universitas Multimedia Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31937/sk.v10i2.929

Abstract

In industry 4.0, a complex system was needed to automatically control and communicate between devices. One component that often used in industrial automation is Wireless Sensor Networks (WSN), which is worked by transmitting the data needed through electromagnetic waves. The electromagnetic propagation in industrial process encounter challenges which caused by reflection or scattering from the object inside the industrial site. Therefore, in this research, the author will conduct a simulation to determine the characteristic of electromagnetic propagation in industrial site. The simulation was done by simulating antenna dipole with frequency 2.4 GHz in the simple 3D industrial site consist of some component.  The result shows that simulating antena dipole in industrial site will affect the characteristic of the antena such as gain, directivity, and S parameter.