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PENGURANGAN DAMPAK GANGGUAN ( INTERFERENSI ) PADA JARINGAN WI-FI DENGAN METODE PEMISAHAN GEOGRAFIS DAN GUARD BAND Rangganis, Rangganis; Rahayu, Yusnita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Wi-Fi (Wireless Fidelity) is an application of WLAN (Wireless Local Area Network) using IEEE 802.11 standard. Wi-Ficommunication systems use radio networks with a frequency of 2,4 GHz, a weakness in wireless communication issusceptible to interference called co-channel and adjacent channel. In this research solution given by two methodscalled geographical separation and guard band. Geographical separation is a method that is done by giving thedistance between two interconnecting devices. Separation based on the scope of the coverage area of the device that isby gradually shifting until no interference occurs again. Guard band method is a method by giving the space band onboth interconnected channels of 3 MHz. In this study the parameter in the analysis is the SNR (Signal to Noise Ratio)value, the lowest SNR value occurs in the geographical separation method at a distance of 10 meters on signal channel1 with signal channel noise 1 is 12 dB when interference co-channel. The highest SNR value occurs in testinggeographic separation method in channel 7 with signal channel noise 4 at a distance of 40 meters when adjacentchannel interference occurs is 56 dB. Research result shows the most effective method to reduce the impact ofinterference is the geographical separation method.Keywords: Geographical separation, guard band, interference, Wi-Fi.
TRANSPARENT ENERGY HARVESTING ANTENNA FOR VEHICLE WINDSHIELD APPLICATION Rahayu, Yusnita; Ikmal, Muhammad; Syam, Ahmad Mudhirullaq; Junianto, Daniel
SINERGI Vol 23, No 1 (2019)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2019.1.004

Abstract

This paper presents a transparent energy harvesting antenna for a vehicle windshield application. The antenna is designed using AgHT-4 with a thickness of 0.175 mm and the glass substrate (Ɛr= 4.82) with a thickness of 2 mm. The antenna has dimensions of 46.238 x 35.4 mm. The antenna is designed and simulated in CST simulation software. It shows that the return loss of -32.76 dB obtained at 2.2412 GHz with broad directional pattern and a gain of 5 dBi. The rectifier circuit of RF energy harvesting will charge the energy storage by utilizing the ambient RF signals from the environment, convert it to the DC signal, and using the DC signal to charge the energy storage. This antenna is intended to be mounted on a car windshield to provide Wi-Fi signals to passengers
PERANCANGAN ANTENA DENGAN CIRCULAR LINE PATCH DAN THICK LINE UNTUK LTE FREKUENSI 1.8 GHZ Rahayu, Yusnita; Alfikri, Kurnia; Silalahi, Rhendy Theopilus
SINERGI Vol 21, No 1 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.215 KB) | DOI: 10.22441/sinergi.2017.1.009

Abstract

Antena Circular line patch memiliki bentuk patch circular dan antena Thick line memiliki patch rectangular. Kedua antena ini mampu bekerja secara optimal pada frekuensi 1.8 GHz. Software CST digunakan dalam perancangan dua antena ini dan  dilakukan beberapa kali pengkarakterisasian. Untuk antenna circular line patch, didapat hasilnya yaitu pada frekuensi kerja 1.8 GHz dengan return loss -24.36 dB, bandwidth 160 MHz, dan gain  2.457 dBi. Antena thick line patch dan circular slot, didapat hasilnya yaitu pada frekuensi 1.8 GHz dengan return loss -26.493 dB, bandwidth 213 MHz, dan gain  2.26 dBi. 
POWER SUPPLY MANAGEMENT SYSTEM DESIGN ON NODE EARLY WARNING SYSTEM FOR PEATLANDS FIRE MITIGATION Muammar, Taufiq; Amri, Rahyul; Rahayu, Yusnita
SINERGI Vol 22, No 1 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (492.841 KB) | DOI: 10.22441/sinergi.2018.1.006

Abstract

Early warning system is one of the technology to detect land fires by utilizing a network of wireless sensors. Constant data transmission by the sensor nodes consumes a large amount of energy on the nodes’ sides that could affect the battery’s longevity. This research is done to discover the amount of power consumption and battery longevity during fire emergencies, and during non-emergency situation on peatlands. Power saving on the fire detecting system uses an LM35 temperature sensor, ATmega8 micro-controller and HC-12 transmission module. The overall result of powered by a 9 volt battery during fire emergencies, and during non-emergency, the power consumption reaches up to 1 Wh, with various longevity levels of the battery. The implementation of sleep/wake up mode scheduling during fire emergencies and non-emergencies could save battery for 2 hours compared to those without the power saving mode implementation. Power saving during fire emergency could be minimalized by activating the sleep mode activation power-down on the micro controller and it can also set the data transmission schedule to minimalize data usage during fire emergency, so that the usage of sleep/wake up mode interval scheduling during transmission could minimalize energy consumption and elongate the power supply active period.
PERANCANGAN JARINGAN FEMTOCELL PADA JARINGAN 3G DI GEDUNG C FAKULTAS TEKNIK UNIVERSITAS RIAU Akmal, Akmal; Rahayu, Yusnita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The worst network performance of ?3? network provider at Building C, Faculty of Engineering has affected to the users in download / upload data from internet. Walking test measuremeat has performed and showed that average power level at each floor is -95,59 dBm. It does not meet 3GPP standard. Therefore, this paper presents the design of femtocell network for 3G indoor communication at Building C, Faculty of Engineering, University of Riau by using Radio Wave Propagation Simulator (RPS). There are two design considerations need to be calculated such as coverage area and network capacity. In terms of coverage area, four (4) Femtocell Access Points (FAPs) are required for each floor. However for netwok capacity, the FAPs are not distibuted equally for each floor, two (2) FAPs are required for 1st and 2nd floor, five (5) FAPs are required for 3rd floor. Three (3) scenarios for FAPs position are performed in this simulation; FAP is at the middle, corner, and random of ceiling. The best simulation results are obtained for random position which gives coverage area of -36.19 dBm and the lowest Signal Interference Ratio (SIR) of 1.50 dB. Both results meet the 3GPP standard.Keywords: HSDPA, Femtocell, Radio Wave Propagation Simulator, Propagation COST 231 Multi-Wall Model
DESIGN OF RECTANGULAR WITH 3 SLOT MICROSTRIP ANTENNA FOR APPLICATION LTE 2.1 GHz Rahayu, Yusnita; Pohan, Irfan Alwandi
SINERGI Vol 22, No 2 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.844 KB) | DOI: 10.22441/sinergi.2018.2.009

Abstract

A rapid development of telecommunications technology, and over time, the existing network technologies continue to be developed. To create the latest technology called Long Term Evolution (LTE). With the technology that has a high transmission speed, of course, required new devices that can operate on this network. Antennas are needed on these networks is an antenna that is small and easily integrated. In this case, the right antenna to be used is the microstrip antenna. In this paper, which will be designed antenna is an antenna feed line rectangle shapes that can operate at a frequency of 2.1 GHz.
DUAL BAND ANTENA DESIGN MIKROSTRIP DENGAN BENTUK SLOT BYEMAX UNTUK PENERAPAN FREKUENSI 2.1 GHz LTE Rahayu, Yusnita; Pradana, Zikri
SINERGI Vol 21, No 2 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (783.706 KB) | DOI: 10.22441/sinergi.2017.2.004

Abstract

Antena dual-frequency merupakan antena alternatif yang dapat digunakan untuk sistem radio yang bekerja pada dua kanal frekuensi yang berbeda jauh. Ketika dua frekuensi kerja terpisah dengan jarak yang cukup jauh, sebuah struktur patch dual-frequency dapat dirancang untuk menghindari penggunaan antena yang terpisah. Antena mikrostrip adalah salah satu solusi antena dual-frequency yang dapat dikembangkan, karena memiliki bentuk sederhana, unjuk kerja yang baik dan mudah dalam instalasinya.Jurnal ini membahas desain dari elemen antena dengan cylinder patch dengan slot byemax yang terobsesi dari film animasi. Patch mikrostrip antena dirancang dengan menggunakan perhitungan lebar patch (wp) dan panjang patch (lp). Desain dan simulasi antena mikrostrip membutuhkan software CST.
TRANSPARENT ENERGY HARVESTING ANTENNA FOR VEHICLE WINDSHIELD APPLICATION Rahayu, Yusnita; Ikmal, Muhammad; Syam, Ahmad Mudhirullaq; Junianto, Daniel
SINERGI Vol 23, No 1 (2019)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (278.967 KB) | DOI: 10.22441/sinergi.2019.1.004

Abstract

This paper presents a transparent energy harvesting antenna for a vehicle windshield application. The antenna is designed using AgHT-4 with a thickness of 0.175 mm and the glass substrate (Ɛr= 4.82) with a thickness of 2 mm. The antenna has dimensions of 46.238 x 35.4 mm. The antenna is designed and simulated in CST simulation software. It shows that the return loss of -32.76 dB obtained at 2.2412 GHz with broad directional pattern and a gain of 5 dBi. The rectifier circuit of RF energy harvesting will charge the energy storage by utilizing the ambient RF signals from the environment, convert it to the DC signal, and using the DC signal to charge the energy storage. This antenna is intended to be mounted on a car windshield to provide Wi-Fi signals to passengers
DUAL BAND ANTENA DESIGN MIKROSTRIP DENGAN BENTUK SLOT BYEMAX UNTUK PENERAPAN FREKUENSI 2.1 GHz LTE Rahayu, Yusnita; Pradana, Zikri
SINERGI Vol 21, No 2 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2017.2.004

Abstract

Antena dual-frequency merupakan antena alternatif yang dapat digunakan untuk sistem radio yang bekerja pada dua kanal frekuensi yang berbeda jauh. Ketika dua frekuensi kerja terpisah dengan jarak yang cukup jauh, sebuah struktur patch dual-frequency dapat dirancang untuk menghindari penggunaan antena yang terpisah. Antena mikrostrip adalah salah satu solusi antena dual-frequency yang dapat dikembangkan, karena memiliki bentuk sederhana, unjuk kerja yang baik dan mudah dalam instalasinya.Jurnal ini membahas desain dari elemen antena dengan cylinder patch dengan slot byemax yang terobsesi dari film animasi. Patch mikrostrip antena dirancang dengan menggunakan perhitungan lebar patch (wp) dan panjang patch (lp). Desain dan simulasi antena mikrostrip membutuhkan software CST.
Sistem Pendeteksi Gelombang Otak Berbasis Electroencephalogram (EEG) Pada Studi Kasus Anak Penderita Autisme Siregar, Gamaliel Saverius; Rahayu, Yusnita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Brain is the important part as a control center, coordination and controling the human body. Inside the brain can be noticed that there are activity and abnormalities of the brain work. Every single person has activity or abnormalities brain work. It can happen to children with autism. Children who have an autistic symptoms occur due to distrubance of complex and variation of the brain function. A brain waves recorder or Elektroesefalogram can see and read the brain work activity. elektroesefalogram is a test that is used to know the electrical activity of the brain to detect whether there is a brain abnormality or not. This research designs a prototype EEG equipment especially to record children with autistic symptoms. The choosen participants in this research are chosen by seeing the result of CAST questionnaire that contains 37 questions. The recording in this research is used by using a particular sensor which is electrode, that is installed on the scalp and connected to computer/laptop. Using 4 electrodes in the lobes that are determined as a benchmark. The result of the recording can be displayed directly by MATLAB on a connected computer.Keywords : Autism, EEG, CAST, electrodes, Electroensephalogram, MATLAB.
Co-Authors Adit Kurniawan Afif, Luthfi Afif, Luthfi Akmal Akmal Alfannizar, Ibnu Amin, Hidayatul Angga Pratama Anggie Kurnia Fareri, Anggie Kurnia Anggreani, Dyan ANHAR ANHAR, ANHAR Asrul, Muhammad Rifqy B. P, Yoga Baaqii, Dio Resya Budi Prasetyo Candra, Feri Candra, Feri Chandra Chandra D.A, Raja Dara Incam Ramadhan, Dara Incam Darbi, Ahmad Deni, Rahmat Efendi, Muhammad Ridho Efriyendro, Rendi Eko Prasetio, Eko Erfiansyah, Dheo Ery Safrianti Firdaus, Johanes Fitria, Lisma Franatha, Vickri Wira Gilang Bagaskara, Gilang Hamdani, Eddy Harahap, Makmul Siddiq Hazman, Haziq Hidayat, Muhammad Ibnu Huriatul Masdar Hutapea, Nola Gabriella Ikmal, Muhammad Ikmal, Muhammad Ilham Dwi Anshori, Ilham Dwi Ilham Ilham Indah Permata Sari Jherino Permana Putra, Jherino Permana Junianto, Daniel Junianto, Daniel Kabir, Fadhli Khoirul Anwar Kurnia Alfikri, Kurnia Linna Oktaviana Sari Lubis, Ahmad Sofyan Meliza Sukma Riani, Meliza Sukma Middinali, Nadjum Mustofa, Ivan Rafli Muttaqin, Abdul Nasution, Abdul Risyal Ngah, Razali Pohan, Irfan Alwandi Pohan, Irfan Alwandi Pratama, Septyo Adi Putra, Hikmah Adi Putra, Jherino Permana Putra, Rio Wira Radhelan, Muhammad Rizki Radhelan, Muhammad Rizki Rahayu, Tulus Rahmanda, Dian Rahyul Amri Rangganis, Rangganis Razali Ngah Reyhan, Muhammad Saiful Fadhil Rezki Ananda Gusma Rhendy Theopilus Silalahi, Rhendy Theopilus Rifki Rifki, Rifki Rizky Nelar Lesmana, Rizky Nelar Robiansyah, Firman Sanjaya, Erick Justin Saputra, Feri Saputra, M. Feri Sarnia Rizki Oktareza, Sarnia Rizki Septian Tri Wahyudi, Septian Tri Sholeh, Mohamad Siregar, Gamaliel Saverius Sofyan Lubis, Ahmad Suganda, Ilham Ferdian Suwitno Suwitno, Suwitno Syafitri, Elsa Syafitri, Elsa Syam, Ahmad Mudhhirulhaq Syam, Ahmad Mudhirullaq Syam, Ahmad Mudhirullaq Taufiq Muammar, Taufiq Virdis, Antonio Waruwu, Immanuel Waruwu, Immanuel Wijaya, Jodi Yasri, I. Yasri, I. Zikri Pradana, Zikri