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All Journal TESLA Jurnal Teknik Elektro UNTAR Jurnal Teknik Elektro ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika JOURNAL OF INFORMATICS AND TELECOMMUNICATION ENGINEERING JTERA (Jurnal Teknologi Rekayasa) Techne : Jurnal Ilmiah Elektroteknika Jurnal Telematika Jurnal Teknik Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat SULUH: Jurnal Abdimas Jurnal Pengabdian Masyarakat Teknik Abdimasku : Jurnal Pengabdian Masyarakat Reswara: Jurnal Pengabdian Kepada Masyarakat JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Makara Journal of Technology Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering)
Indra Surjati
Universitas Trisakti
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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DUAL FREQUENCY ANTENA MIKROSTRIP Surjati, Indra
Jurnal Teknik Elektro Vol 3, No 1 (2003)
Publisher : Jurnal Teknik Elektro

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Abstract

This research showed that microstrip antenna can be worked at two different frequencies.This different frequency with low frequency ratio was required as its standard, such the thirdgeneration communications UMTS (Universal Mobile Telecommunications System). Usingslot loaded two different frequencies can be achieved, f1 = 1.83 GHz and f2 = 2.07 GHz atthe feed point (16;20,5) mm with frequency ratio 1.13 and VSWR under 1.2Keywords: dual frequency, probe feed, microstrip antenna
ANALISIS PERHITUNGAN LINK BUDGET INDOOR ENETRATION WIDEBAND CODE DIVISION MULTIPLE ACCESS (WCDMA) DAN HIGH SPEED DOWNLINK PACKET ACCESS (HSDPA) PADA AREA PONDOK INDAH Surjati, Indra; Ningsih, Yuli Kurnia; Septiana, Hendri
Jurnal Teknik Elektro Vol 7, No 2 (2008)
Publisher : Jurnal Teknik Elektro

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Abstract

The indoor penetration manifested as macro cell system which is the extension of outdoorsignalling into indoor premises, can be implemented both by High Speed Downlink PacketAccess (HSDPA) and Wideband Code Division Multiple Access (WCDMA) as well in thearea of 3.5G related application. The significant parameters being used in this researchwere Effective Isotropic Radiated Power (EIRP) and Received Signal Code Power (RSCP).The results showed that for data down linking operation the EIRP 58 dBm and the RSCP -69.94 dBm for WCDMA, while the EIRP 56 dBm and the RSCP -71.64 dBm for HSDPA.Furthermore, the drive test results showed for HSDPA running File Transfer Protocol (FTP)application the RSCP -92.2 dBm with throughput ≈2,0Mbps, while for running Hyper TextTransfer Protocol (HTTP) application the RSCP -95 dBm with throughput ≈1.9Mbps. Thedrive test result for WCDMA showed the RSCP is -69.72 dBm with throughput 328 kbps.Keywords: High Speed Downlink Packet Access (HSDPA), Wideband Code DivisionMultiple Access (WCDMA), Hyper Text Transfer Protocol (HTTP), FileTransfer Protocol (FTP)
ANALISIS SISTEM INTEGRASI JARINGAN WIFI DENGAN JARINGAN GSM INDOOR PADA LANTAI BASEMENT BALAI SIDANG JAKARTA CONVENTION CENTRE Surjati, Indra; Chandra, Henry; Prabowo, Agung
Jurnal Teknik Elektro Vol 7, No 1 (2007)
Publisher : Jurnal Teknik Elektro

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Abstract

The research studied about designing the integration between Wireless Fidelity(WiFi) and GSM indoor network, followed by the observation of its signal quality andrelated environmental factors. To achieve the research goal, it is mandatory to calculate theEffective Isotropic Radiated Power (EIRP) and the Signal Strength (SS) for GSM network orReceived Signal Strength Indication (RSSI) for Wireless Fidelity (WiFi) network. Taking intoconsideration about the GSM and WiFi hardwares specifications, RBS power, Access Pointsand any related enviromental factors; those parameter can be definitely calculated. Theresearch results showed that for GSM indoor network the EIRP 11.9141 dBm and the SignalStrength -70.2759 dBm; while for WiFi network the EIRP 18.7524 dBm and the RSSI -37.3376 dBm with to System Operating Margin is 30.6624 dB. Furthermore it can be statedthat for obtainning the improved output signal strength as implementation of integratingboth network system, it advisable to add Multi Band Combiner altogethet with booster at theGSM network side.Keywords: WiFi, GSM Indoor, Effective Isotropic Radiated Power (EIRP), Received SignalStrength Indication (RSSI).
ANALISIS DISPERSION POWER PENALTY PADA AREA RING-1 JARINGAN LOKAL AKSES FIBER STO GATOT SUBROTO Ningsih, Yuli Kurnia; Surjati, Indra; Sunarto, Sunarto; Hardianto, Herbowo
Jurnal Teknik Elektro Vol 5, No 1 (2005)
Publisher : Jurnal Teknik Elektro

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Abstract

Fiber attenuation caused by chromatic dispersion and modal dispersion is commonlyreferred to as a dispersion power penalty. In the wave transmitted by transmitter, dispersionoccurred, caused degradation of signal quality, so that the signal receiver is not as good aswhich is being transmitted. In this paper will be discussed about the impact of dispersionpower penalty in ring-1 STO Gatot Subroto area. Analysis was done to several factors thatcan cause dispersion power penalty, which are distance, wavelength, and data rate beingused. The calculation with available data and specification has been done, so that the routeswith the biggest and the smallest dispersion power penalty can be detected. The biggestdispersion power penalty happened in Palma Citra – Umawar route at distance of 9.387 kmwith  =1550 nm and data rate 622.08 Mbps. While the smallest was 1.221 7 10  dB,happened in Tifa – STO Gatot Subroto route at distance of 1.626 km with =1310 nm anddata rate 155.52 Mbps. All those calculations were still in permissible limit, not more than 2dB. Furthermore from some routes were obtained very small dispersion power penalty. Thebigger the fiber length and data rate, the bigger the dispersion power penalty is. Finally itcan be concluded that fiber length, wavelength, and data rate are equivalent to thedispersion power penalty.Keyword: fiber optic, dispersion, Synchronous Digital Hierarchy
KAJIAN PENERAPAN FREE SPACE OPTIC (FSO) PADA GEDUNG E DAN FG DI KAMPUS A UNIVERSITAS TRISAKTI Ningsih, Yuli Kurnia; Surjati, Indra; Danubrata, Oky
Jurnal Teknik Elektro Vol 6, No 2 (2007)
Publisher : Jurnal Teknik Elektro

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Abstract

Free Space Optics (FSO) as Data Communication System technology contribute positivelynot only to its users but also to its operators. It is regarded as the development of infraredcommunication that can overcome some drawbacks of wireless data communication such aslosses. This study concerns the implementation of Free Space Optics for cross connectedbuildings with the calculation of link margin factor to determine exactly the resultingperformance under different kinds of weather: sunny, moderate rain and heavy rain. Theresults shown are those for the distance of 35.66 m. The obtained attenuation factors are asfollows: -0.0078452 dB in sunny weather, -0.0156904 dB in light rain; and -0.1412136 dB inheavy rain. These results are still less than the link margin of 32.2228 dB, which means thatFree Space Optics is good enough to be implemented. The result also showed that for thedistance of 118.79 m, the attenuation factor is -0.4704084 dB in heavy rain and still lessthan the link margin of 22.5524 dB. It means that Free Space Optics can be implemented forline of sight communication.Keywords: Free Space Optics (FSO), link margin, weather, attenuation factor
ANALISIS PERFORMANSI JARINGAN FRAME RELAY VIRTUAL PRIVATE NETWORK Ningsih, Yuli Kurnia; Surjati, Indra; Faiq, Alfian Noor
Jurnal Teknik Elektro Vol 5, No 1 (2005)
Publisher : Jurnal Teknik Elektro

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Abstract

Frame relay, according to its name, is a technology that depends on frames that’s beingrelayed in a data transmission. This technology is a simplified form of packet switching,similar in principle to X.25, in which synchronous frames of data are routed to differentdestinations depending on header information [Bates,2002:57]. A regular analysis on networkperformance and quality must be taken to guarantee certain service level. This task is soimportant as frame relay usually carries data on high speed data communication backbone.The performance analysis from the Frame Relay network will be discussed at the providingcompany. Performance analysis is useful to know the quality of service from the Frame relaynetwork . To analyze the quality of service from the Frame relay network can be seen from themeasurement that can affect the network. There are three measures which can affect thenetwork significantly such as bus utilization, excess burst percentage and dropped packetpercentage. Those three are closely related and having significant impact on overall framerelay’s network quality. Based on the results from the networks analyzed shows that it hasenough processing power and bandwidth resources, eventhough nearly 30% of their networkpath is under specified service level guarantee. Even so, overall quality of frame relaynetwork meets the specified service level quality.Keywords: Frame Relay, Bus Utilization, Excess Burst Percentage, Dropped PacketPercentage
ANTENA MIKROSTRIP BENTUK SEGIEMPAT Surjati, Indra
Jurnal Teknik Elektro Vol 1, No 1 (2001)
Publisher : Jurnal Teknik Elektro

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Abstract

Patch antenna are popular for their well known attractive features, such as low profile,light weight and compatibility with monolithic microwave integrated circuits (MMIC) andmicrowave integrated circuits ( MIC ). There are many various shapes of patch antennas,such as rectangular, circular, square, triangular and ring. The simple shape isrectangular patch antenna and this paper will discuss about the rectangular patchantennaKeywords: feeding, coupling.
Analisis Interferensi White Space Device terhadap Sistem Radio Navigasi Penerbangan pada Frekuensi 960 MHz SARI, LYDIA; ALAM, SYAH; SURJATI, INDRA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2 (2019): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.351

Abstract

ABSTRAKPemerintah Indonesia mengalokasikan spektrum frekuensi 960-1164 MHZ untuk sistem komunikasi bergerak maupun untuk radio navigasi penerbangan. Penggunaan White Space Device (WSD) merupakan solusi keterbatasan spektrum, karena mampu mengidentifikasi dan memanfaatkan frekuensi yang tidak terpakai. Penelitian ini menyelidiki potensi interferensi yang terjadi pada koeksistensi sistem radio navigasi penerbangan serta perangkat WSD di pita 960 MHz. Penelitian menggunakan pendekatan matematis Minimum Coupling Loss (MCL) serta simulasi dengan Spectrum Engineering Advanced Monte Carlo Analysis Tool (SEAMCAT). Hasil penelitian menunjukkan bahwa level interferensi yang masih diperbolehkan berada di kisaran -81,589 dBm. Level ini tercapai dengan penggunaan jarak proteksi antar sistem sejauh 36 km. Penurunan daya pemancar WSD atau peningkatan gain RSBN sebesar 1 dBm dapat memperkecil jarak proteksi menjadi 30 km untuk mencapai probabilitas interferensi berturutturut 3,55% dan 3,6%.Kata kunci: white space devices, interferensi, radio navigasi penerbangan ABSTRACTThe Indonesian Government allocates the 960-1164 MHz spectrum for mobile communications and aeronautical radio navigation services. Cognitive radio is a technology which will enable the use of a limited spectrum optimally. Devices implemented with cognitive radio capability is referred as White Space Device (WSD) as they can identify and utilize idle channels. This paper investigates the interference potential between aeronautical radio navigation services and WSD as they co-exist in the 960 MHz spectrum using Minimum Coupling Loss (MCL) formulae and simulations using Spectrum Engineering Advanced Monte Carlo Analysis Tool (SEAMCAT). Results show that the permissible interference level is -81,589 dBm which is achievable if the two systems are separated by 36 km. Decreasing the WSD power level or increasing the RSBN gain by 1 dBm can decrease the protection distance between the two systems to 30 km to achieve an interference probability of 3,55% and 3,6%, respectively.Keywords: white space devices, interference, aeronautical radio navigation
Perancangan dan Realisasi Antena Mikrostrip Log Periodik dengan Elemen Parasitik Air Gap untuk Aplikasi TV Digital DVB-T2 SURJATI, INDRA; ALAM, SYAH; NINGSIH, YULI KURNIA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 7, No 2 (2019): ELKOMIKA
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v7i2.324

Abstract

ABSTRAKPenelitian ini mengusulkan desain dan prototipe antena mikrostrip log periodik yang dikembangkan dengan metode parasitik air gap (celah udara) untuk aplikasi TV digital pada rentang frekuensi 478-694 MHz. Penggunaan elemen parasitik dengan celah udara bertujuan untuk meningkatkan nilai gain pada antena. Dari hasil pengukuran diperoleh nilai return loss sebesar -20.27 dB dan VSWR sebesar 1.31 pada frekuensi kerja 600 MHz. Bandwidth yang dihasilkan dari antena yang telah dipabrikasi adalah 273 MHz dengan rentang frekuensi kerja 461 MHz ? 734 MHz. Gain yang dihasilkan dari antena mikrostrip log periodik dengan elemen parasitik adalah 16.67 dB pada frekuensi kerja 600 MHz atau meningkat 40.02 % dibandingkan dengan log periodik konvensional yang telah didesain sebelumnya. Dari keseluruhan hasil yang diperoleh maka dapat disimpulkan bahwa antena yang diusulkan dapat digunanakan sebagai antena penerima untuk aplikasi TV Digital di Indonesia.Kata kunci: antena, mikrostrip, log periodik, parasitik, celah udara ABSTRACTThis study proposes the design and prototype of log periodic microstrip antenna which was developed using the parasitic air gap for digital TV applications with a frequency range of 478-694 MHz. The use of parasitic elements with air gap aims to increase the gain of the antenna. From the measurement results, proposed antenna obtained return loss of -20.27 dB and VSWR of 1.31 at the working frequency of 600 MHz. The bandwidth produced from proposed antenna is 273 MHz with a working frequency range of 461 MHz - 734 MHz. The gain generated from log periodic microstrip antenna with parasitic element is 16.67 dB at the working frequency of 600 MHz or increased 40.02 % compared with conventional log periodic that have been designed before. From the overall results obtained, it can be concluded that the proposed antenna can be used as receiver antenna for Digital TV applications in Indonesia.Keywords: antenna, microstrip, log periodic, parasitic, air gap
PERBANDINGAN FIELD STRENGTH UPPER DAN COMBINED ANTENNA PADA TRANSMISI TV 7 SURABAYA Surjati, Indra; Setyaningsih, Endah; Hermawan, Stevanie
TESLA Jurnal Teknik Elektro UNTAR Vol 8, No 2 (2006): OKTOBER 2006
Publisher : Universitas Tarumanagara

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Abstract

It has been well known that TV 7 one of TV stations in Indonesia always provides good quality of program for its clients throughout national frameworks from its head quarter in Surabaya. Field strength antenna plays important role in this service, especially its prominent parameters like antenna gain, radiation pattern as well as its radiated powers. It has been noted from this investigation that upper antenna suits for the above purpose.
Co-Authors A.A. Ketut Agung Cahyawan W Agung Prabowo Alfian Noor Faiq Alga Maulana, Gusti Anindito, Atria Dian Widi Astuti, Budi Irawan Prima Putra, Dian Widi Astuti, Djoko Hartanto Doris, Muhamad Eko Rahardjo Eko Tjipto Rahardjo Endah Setyaningsih F.X. Sigit Wijono Gagarin Irianto, Chairul Gunawan Tjahjadi Hendri Septiana Henry Chandra Herbowo Hardianto Hermawan, Stevanie Hilyawan, Mohamad Reynaldy Iznih Iznih, Iznih Kuswanto, Hery Lydia Sari Marlin Malluka marlina, Pipit Dewi Miranti Miranti Muhammad Ilham Oky Danubrata PUDJI ASTUTI Putranto, Agam R. Deiny Mardian Wijayapraja Rastanto Hadinegoro Reynaldhy Hilyawan, Muhammad Rizka, Nadia Media Sanaz, Zikra Aulia Saragi, Simon Jansen Sari, Fitri Kurnia Setiawan, Tata Sunarto Sunarto Suryadi Suryadi swasono adi, Tri Syah Alam Syah Alam TANUWIJAYA, JUSTIN Teguh Firmansyah Vaswani, Rakesh Wayoi, Cahya Muzaki Yuli Kurnia Ningsih Yuli Kurnia Ningsih, Yuli Zahriladha Zakaria