Articles

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
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
HIGH GAIN 5G MIMO ANTENNA FOR MOBILE BASE STATION Rahayu, Yusnita; Sari, Indah Permata; Ramadhan, Dara Incam; Ngah, Razali
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 1: February 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1901.203 KB) | DOI: 10.11591/ijece.v9i1.pp468-476

Abstract

This article presented a millimeter wave antenna which operated at 38 GHz for 5G mobile base station. The MIMO (Multiple Input Multiple Output) antenna consisted of 1x10 linear array configurations. The proposed antenna?s size was 88 x 98 mm^2  and printed on 1.575 mm-thick Rogers Duroid 5880 subsrate with dielectric constant of ?_r= 2.2 and loss tangent (tan?) of 0.0009. The antenna array covered along the azimuth plane to provide the coverage to the users in omnidirection. The simulated results showed that the single element antenna had the reflection coefficient (S11) of -59 dB, less than -10 dB in the frequency range of 35.5 - 39.6 GHz. More than 4.1 GHz of impedance bandwidth was obtained. The gain of the antenna linear array was 17.8 dBi while the suppression of the side lobes was -2.7 dB.  It showed a high array gain throughout the impedance bandwidth with overall of VSWR were below 1.0646. It designed using CST microwave studio.
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.
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.
Comparative Analysis on Signal Strengths of Hutchison, Indosat, Telkomsel and Xl Axiata Operators By Applying Rf Signal Tracker Software in The Areas of The Protocol Streets of Pekanbaru District Rahayu, Yusnita; Chandra, Chandra; Anhar, Anhar
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 2: EECSI 2015
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eecsi.2.610

Abstract

Cell phones have become a major part of the society in daily life - today. The use of mobile phones has spread in every community, rural and urban. SingTel, Hutchison, Comindo Axiata and Indosat are some operators cellular telecommunications network that use UMTS and HSDPA technology. The parameters that determine the power level and the quality of the signal strenght of each operator is known as RxLevel (the Receptiom Level) for GSM and the RSCP (Received Signal Code Power) in order to WCDMA. One of methods for analyzing to measure that parameters is a drive test which use RF signal tracker software. This research will compare a drive test method with simulation method, where the simulation using radio mobile software. The location of this research is in some protocol streets on Pekanbaru, such as Jend. Ahmad Yani, Gajah Mada and Diponegoro. The result shows that Telkomsel has the best signal strength in protocol streets on Pekanbaru with -62.335 dBm, followed by XL Axiata with -66.323 dBm, then Hutchison with -74.401 dBm. The lowest signal strenght is operator Indosat with the value -85.84 dBm.
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 | 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. 
Perancangan Mikrostrip Square Patch Array MIMO pada Frekuensi 60 GHz untuk Jaringan 5G WiGig Efendi, Muhammad Ridho; Rahayu, Yusnita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

WiGig (Wireless Gigabit) is the next generation technology of WiFi (Wireless Fidelity). WiGig speeds reach 7Gbps / s and have great access. In this study, microstrip antenna Square Patch Array MIMO (Multiple Input Multiple Output) for WiGig application operating at 60 GHz is discussed. Microstrip antenna is designed by using MIMO Technique to increase the gain. Antenna is simulated by using CST(Computer Simulation Technology) Microwave Studio software. From the simulation results, the antenna can operate at a frequency of 60 GHz. The bandwidth obtained is 4.38 GHz (7.3%) on VSWR 1.06 and the gain is 14.3 dB.Keyword: WiGig, MIMO, Gain, Bandwidth, VSWR
RANCANG BANGUN SISTEM PENDETEKSI KEBAKARAN LAHAN GAMBUT JENIS KAYUAN DENGAN MEMANFAATKAN KARAKTERISTIK PANAS YANG DITIMBULKANNYA Bagaskara, Gilang; Amri, Rahyul; Rahayu, Yusnita
SINERGI Vol 21, No 3 (2017)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2017.3.001

Abstract

Kebakaran lahan gambut yang sudah meluas menimbulkan bencana asap dan penyakit pada masyarakat. Pemantauan kebakaran lahan gambut yang memiliki tingkat akurasi tertinggi adalah ASEAN Specialized Meteorological Center (ASMC) dengan tingkat akurasi sebesar 60%. Dibutuhkan perancangan pendeteksi kebakaran lahan gambut, guna untuk mitigasi bencana kebakaran lahan gambut. Karena gambut yang ada di provinsi Riau umumnya adalah gambut jenis kayuan, jadi penelitian dilakukan pada gambut kayuan. Beberapa metode pengambilan data pada penelitian ini yaitu: uji laboratorium, pengambilan data di lahan gambut kondisi normal, pengambilan data di lahan gambut saat kejadian kebakaran dan pemetaan simpul. Berdasarkan hasil penelitian ini, sensor suhu LM35 memiliki tingkat akurasi dengan persen error rata-rata sebesar 0,22%. Suhu lahan gambut kayuan saat kondisi normal memiliki besar suhu yang selalu berada di bawah suhu udara sekitar. Saat kondisi terbakar besar, suhu lahan gambut kayuan terus meningkat dan melebihi besar suhu udara sekitar. Suhu udara sekitar saat kondisi normal atau saat terjadi kebakaran tidak ada perbedaan yang mencolok, karena kebakaran lahan gambut kayuan tidak begitu bergemuruh perubahan suhu udara sekitar. Radius sensor suhu LM35 pada alat pendeteksi kebakaran lahan gambut mencapai 4 m dengan lama waktu pembacaan 45 menit.
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 | 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.