Syah Alam
Universitas 17 Agustus 1945 Jakarta

Published : 17 Documents
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Triple Band Frequency Using Slit Technique Rectangular Microstrip Antenna for WIMAX Application Alam, Syah
Teknik dan Ilmu Komputer vol. 03 no. 09 Januari-Maret 2014
Publisher : Teknik dan Ilmu Komputer

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Analisis Variasi Parameter Backpropagation Artificial Neural Network dan Principal Component Analysis Terhadap Sistem Pengenalan Wajah Kholis, Ikhwannul; Alam, Syah
ELECTRANS Vol 14, No 1 (2016): Volume 14, Nomor 1, Tahun 2016
Publisher : Universitas Pendidikan Indonesia

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Face recognition can be done by using Backpropagation Artificial Neural Network (ANN) and Principal Component Analysis (PCA). ANN is made to resemble the human neural system. By varying some parameters on backpropagation, backpropagation characteristics is known to minimize errors and epoch and enlarge Recognition Rate. The experimental results show the relationship between the parameters of eigenvalues, alpha, and coefficient of momentum, against the recognition rate obtained.
Polarisasi Melingkar Antena Mikrostrip E Shape Dengan Pencatu Electromagnetic Coupling Surjati, Indra; Alam, Syah; Hotman, Saut
Jurnal Rekayasa Elektrika Vol 13, No 1 (2017)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v13i1.6006

Abstract

This paper proposed a new design of circular polarization E shaped patch microstrip antenna fed by proximity coupling for Wireless Fidelity applications at operating frequency of 2.4 GHz. To generate circular polarization in the proposed antenna, the next steps is making three slits on the patch antenna and with this embedded three slits produces antenna E shaped. Besides that, the proximity coupling fed line is used to increase the bandwidth of the proposed antenna. In this research the patch E shaped was put on the first substrate layer while the proximity coupling feeder was put on the second substrate layer. The substrate material used in this research is one of the two layers FR 4 Epoxy with relative dielectric constant ( r) of  4.4  and thickness (h) of 1.6 mm. The circular polarization can be achieved by adjusting the width and length of the E shaped antenna. The simulation of this research gave some important antenna parameters such as axial ratio value of 2.58 dB, return loss of -19.98 dB, VSWR of 1.223 and bandwidth of 151.3 MHz. Finally, its measurement results gave also some related comparative data such as return loss of -22.12 dB, VSWR of 1.16, bandwidth of 153.2 MHz, and Half Power Beamwidth of 580.
Rancang Bangun Antenna Mikrostrip Peripheral Slits Linear Array Untuk Aplikasi Wi-Fi Alam, Syah; Wibisana, I Gusti Nyoman Yogi; Surjati, Indra
Jurnal Rekayasa Elektrika Vol 13, No 1 (2017)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v13i1.5914

Abstract

Wireless Fidelity (Wi-Fi) is the modern telecommunication technology nowadays being so widely used and developed at operating frequency of 2.4 GHz, that needs microstrip antenna as best suited supporting means for transmitting and receiving data signals as well at its wave transceiver subsystem.  The proposed antenna design were consists of four elements rectangular patch antenna with peripheral slits technique arranged in a linear array of 2x2 operating at the frequency of 2.4 GHz until 2.5 GHz. In addition to that, the feeding technique used in this research is microstrip fed line. The simulation from this research resulted in reducing the size of related antenna dimension up to 17% compared to that of four elements array without peripheral slits. It is also apparent that the bandwidth of the proposed antenna is 320 MHz (2.253 GHz–2.573 GHz) which is equivalent to bandwidth increase percentage of 13.07%, The simulation results in the center of frequency 2.448 GHz obtained return loss of -26.14 dB with a VSWR of 1.104. The measurement results obtained bandwidth of the proposed antenna is 150 MHz (2.424 GHz–2.574 GHz) which is equivalent to 12% increase of bandwidth percentage. The results of measurements process at the center of frequency 2.448 GHz obtained value of return loss of -16.88 dB with  VSWR of 1.304.
Design and Realization of Compact Microstrip Antenna Using Fractal Sierpenski Carpet For Wireless Fidelity Application Alam, Syah; Surjati, Indra; Ferawan, Awang; Firmansyah, Teguh
Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Vol 6, No 1: March 2018
Publisher : IAES Indonesian Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeei.v6i1.390

Abstract

This paper proposed new design of compact microstrip antenna using fractal sierpenski carpet method for Wireless Fidelity application at working frequency of 2400 MHz. The proposed antenna using FR4 Epoxy with (εr) of 4.3, substrate thickness (h) of 1.6 mm and loss tangent (tan δ) of 0.0265. Antenna is designed using AWR Microwave Office software.The sierpenski carpet method is used in order to reduce the dimensions of the microstrip antenna to become more compact. From the measurement results obtained reflection coefficient value -26.077 dB, VSWR 1.104 at working frequency of 2400 MHz frequency with a bandwidth of 127 MHz (2338 MHz – 2465 MHz). Beside that, by using fractal sierepenski carpet method, microstrip antenna dimension was reduced until 47.80% compared to conventional rectangular microstrip antenna.
DESAIN ANTENA MIKROSTRIP GPS BERBENTUK LINGKARAN (CIRCULAR) Alam, Syah; Prasojo, Arief Karyadi
JURNAL KAJIAN TEKNIK ELEKTRO Vol 2, No 1 (2017): JKTE Vol 2 No 1 (Maret-Agustus 2017)
Publisher : Universitas 17 Agustus 1945 Jakarta

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Dalam penelitian ini dilakukan perancangan antena mikrostrip lingkaran yang diaplikasikan untuk keperluan GPS (Global Positioning System) yang bekerja pada frekuensi 1575 MHz dengan menggunakan saluran pencatu microstrip line. Dari hasil simulasi diperoleh  nilai return loss sebesar -12.92 dB dan VSWR 1,668.  Kata Kunci - Antena Mikrostrip lingkaran, return loss,  VSWR dan GPS.
Perancangan Antena Mikrostrip Bentuk Segiempat Dual Frequency untuk Aplikasi WLAN 2400 Mhz dan 5000 Mhz Elba, Putu; Alam, Syah
JURNAL KAJIAN TEKNIK ELEKTRO Vol 1, No 1 (2016): JKTE Vol 1 No 1 (Maret-Agustus 2016)
Publisher : Universitas 17 Agustus 1945 Jakarta

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Abstrak — Dalam penelitian ini dilakukan perancangan antena mikrostrip bentuk segiempat untuk frekuensi 2400 MHz dan 5000 MHz memenuhi standar WLAN IEEE 802.11b dan IEEE 802.11a. Antena ini memiliki impedansi masukan sebesar 50 Ω dengan ukuran patch segiempat W = 30 mm dan L = 29 mm menggunakan substrat FR4 (h = 1,6 mm). Lebar saluran pencatu adalah 3,1 mm dengan panjang 6 mm. Untuk menghasilkan dual frequency, dilakukan dengan menambahkan beban slit pada patch antena. Dari hasil simulasi diperoleh nilai return loss sebesar -13,06 dB untuk frekuensi 2400 MHz dan -31,64 dB untuk frekuensi 5000 MHz dengan nilai VSWR sebesar 1,575 untuk 2400 MHz dan 1,054 untuk 5000 MHz. Bandwidth pada frekuensi 2400 MHz dan 5000 MHz berturut-turut adalah 134 MHz (5,58%) dan 630 MHz (12,6%). Prototipe dari antena yang dirancang telah dipabrikasi, namun belum dilakukan pengujian. Rancangan yang sederhana namun mampu memenuhi tujuan yang diinginkan merupakan keunggulan dibandingkan penelitian sebelumnya.   Kata kunci — Antena mikrostrip, segiempat, WLAN, dual frequency, beban slit
ANTENA MIKROSTRIP SEGITIGA DENGAN PARASITIC UNTUK APLIKASI WIRELESS FIDELITY Alam, Syah; santoso, kukuh aris
JURNAL KAJIAN TEKNIK ELEKTRO Vol 2, No 1 (2017): JKTE Vol 2 No 1 (Maret-Agustus 2017)
Publisher : Universitas 17 Agustus 1945 Jakarta

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Dalam penelitian ini dilakukan perancangan antena mikrostrip segitiga dengan parasitic yang diaplikasikan untuk keperluan WiFi pada frekuensi 2400 MHz dengan menggunakan dua lapis substrat yang sama untuk dapat memperlebar bandwith. Dari hasil simulasi diperoleh peningkatan bandwith sebesar 181 MHz atau 18,31%  dengan nilai return loss sebesar -17,25 dB dan VSWR 1,318.
PERANCANGAN ANTENA MIKROSTRIP ARRAY 2X2 FREKUENSI 2,4 GHZ UNTUK KOMUNIKASI IoT Alam, Syah; Wijaya, Irtanto
JURNAL KAJIAN TEKNIK ELEKTRO Vol 3, No 1 (2018): JKTE Vol 3 No 1 (Maret-Agustus 2018)
Publisher : Universitas 17 Agustus 1945 Jakarta

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Jurnal ini ditujukan untuk men-desain antena mikrostrip dengan empat elemen peradiasi dengan susunan array 2x2  yang bekerja pada frekuensi 2,4 Ghz . Teknik pencatuan yang digunakan pada perancangan antena microstrip adalah teknik pencatuan saluran microstrip. Pada desain antena ini dititik beratkan pada gain dengan frekuensi 2,4 Ghz yang digunakan untuk komunikasi antara sensor-sensor pada jaringan Wi-Fi dengan sensor gateway. Hasil simulasi perancangan antena pada frekuensi 2.4 Ghz didapatkan return loss sebesar -27.23 dB dengan VSWR sebesar 1.089. Bandwidth yang didapatkan pada perancangan antena mikrostrip array 2x2 adalah 308 MHz. Kata Kunci : Array, Microstrip, Antenna, Return Loss, VSWR
Bandwidth enhancement and miniaturization of circular-shaped microstrip antenna based on beleved half-cut structure for MIMO 2x2 application Firmansyah, Teguh; Praptodiyono, Supriyanto; Herudin, Herudin; Aribowo, Didik; Alam, Syah; Astuti, Dian Widi; Yunus, Muchamad
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 2: April 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1791.647 KB) | DOI: 10.11591/ijece.v9i2.pp1110-1121

Abstract

In this paper, circular-shaped microstrip antenna was simulated, fabricated, and measured accordingly. As the novelty, to enhance bandwidth and reduce antenna size, beleved half-cut microstrip structure is proposed. Further, this proposed antenna structure will be applied to multiple input multiple output (MIMO) antenna 2?2. Therefore, this research was investigated conventional circular shape antenna (CCSA), circular shaped beleved antenna (CSBA), and MIMO circular shaped beleved antenna (MIMO-CBSA) as Model 1, Model 2, and Model 3, respectively. An FR4 substrate with er= 4.4, thickness h=1.6 mm, and tan d=0.0265 was used. The simulation has been conducted using Advanced Design System (ADS). The antenna CCSA/CSBA/ MIMO-CBSA achieve 1.831GHz/2.265 GHz/2.256 GHz, -15.13dB/-17.37dB/-17.25 dB, 1.42/1.31/1.33, and 1.474/2.332/2.322 for center frequency, reflection coefficient, VSWR, and bandwidth, respectively. This antenna has a size 63x90 mm and 51.5x90 mm for CCSA (Model 1) and CSBA (Model 2), respectively. After the structure of MIMO 2?2 was applied, the size of antenna MIMO-CBSA (Model 3) became 180 mm x 180 mm with a mutual coupling (S21)=-26.18 dB and mutual coupling (S31)=-26.41 dB. The result showed that proposed antenna CSBA (Model 2) has wider-bandwidth of 58,2% and smaller-size of 18.2%. Furthermore, after CSBA (Model 2) structure was applied to MIMO 2?2 (Model 3) and the MIMO antenna obtain good mutual coupling (<-15dB). Moreover, the measured results are good agreement with the simulated results. In conclusion, all of these advantages make it particularly valuable in multistandard antenna applications design such as GSM950, WCDMA1800, LTE2300, and WLAN2400.