Toto Supriyanto

ABSTRAKJalan kelas IIIC memiliki struktur yang lebih sempit dan biasanya dibangun didekat permukiman penduduk untuk penggunaan pejalan kaki. Selain pejalan kaki, kendaraan motor roda dua juga dapat mempergunakaan jalan tersebut. Permasalahan mulai timbul saat kendaaraan bermotor memiliki kecepatan yang cukup tinggi sehingga membahayakan pengguna jalan lainnya khususnya pedestrian. Untuk mengatasi hal tersebut, pada penelitian ini dilakukan pengembangan X-band speed detector berbasis efek pergeseran doppler untuk kendaraan motor roda dua di jalan kelas IIIC. Detektor yang dibangun mengimplementasikan sensor HB100 dengan frekuensi 10 GHz Adapun efek pergeseran doppler diproses menggunakan Arduino. Parameter yang dijadikan perhitungan diantaranya kecepatan, pergeseran doppler, dan jarak detektor. Hasil pengujian menunjukan bahwa sistem berhasil memiliki akurasi diatas 95% (atau error <5%) pada dengan rentang kecepatan 20-60 Km/jam.Kata kunci: detektor kecepatan; pergeseran doppler; ...

Selada merupakan salah satu jenis tanaman sayuran yang mudah untuk dibudidaya dan dapat tumbuh subur dengan optimal pada suhu  25°C - 28°C dan kelembapan tanah 65% - 78%. Kendala keterbatasan lahan yang dimiliki menyebabkan sulitnya melakukan budidaya tanaman selada. Bilik tanaman adalah alternatif solusi untuk permasalahan tersebut. Bilik tanaman dibuat seperti ruangan bertingkat yang berisi susunan rak yang diisi tanah untuk menanam selada. Sistem ini menggunakan arduino uno, sensor suhu DHT22, sensor kelembapan tanah YL69, LCD, kipas DC, solenoid valve, dan raspberry pi. Hasil pengujian sistem, saat nilai suhu yang terdeteksi oleh sensor DHT22 lebih besar sama dengan 28°C maka sistem secara otomatis mengaktifkan kipas untuk mendinginkan bilik, dan saat suhu mencapai kurang atau sama dengan 25°C kipas secara otomatis mati. Untuk nilai kelembapan tanah, saat sensor YL69 kurang atau sama dengan 65% maka sistem secara otomatis menyiram tanaman dan saat kelembapan tanah lebih besar at...

Hidroponik cara bercocok tanam tidak menggunakan tanah sebagai media tanam, tetapi menggunakan air mengandung nutrisi yang diperlukan tanaman. Salah satu jenis tanaman hidroponik adalah bayam yang dapat tumbuh berkembang pada suhu >25⁰C dan memerlukan nutrisi antara 410 – 900 ppm. Adakalanya pemilik tanaman tidak berada di area penanaman sehingga tidak sempat melakukan pemberian nutrisi tersebut. Sistem ini dibuat untuk monitoring kondisi air, suhu, nutrisi, mengaktifkan pompa air dan nutrisi, menyalakan lampu, dari jarak jauh melalui aplikasi bot telegram. Sistem terdiri dari Arduino Mega 2560, modul NodeMCU ESP8266 untuk pengiriman data ke aplikasi telegram melalui jaringan internet, sensor suhu DHT22 untuk mengetahui suhu lingkungan, sensor TDS untuk memantau konsenterasi nutrisi, sensor ultrasonic untuk ketinggian campuran air dan nutrisi, modul relay 4 channel untuk mengaktifkan tiga buah pompa, dan satu lampu. Pompa digunakan untuk menyiram nutrisi dan mengisi air. Lampu un...

Salah satu aplikasi sistem komunikasi wireless yaitu Wireless Sensor Network (WSN). Penerapan WSN dapat dilakukan pada sistem monitoring ketinggian air sungai secara realtime, dimana data ketinggian air sungai dapat langsung dikirimkan ke web server. Data ketinggian air diperoleh dari sensor HC-SR04, diolah mikrokontroler ATmega 328P dan dikirimkan ke penerima oleh modul transceiver nRF24l01+. Pada modul transceiver nRF24l01+ diperlukan antena. Antena default pada modul ini adalah antena monopole, dan mempunyai kelemahan gain kecil sehingga jarak jangkauan pengiriman data kurang jauh. Untuk mengatasi ini antena monopole diganti menggunakan antena mikrostrip disc sector patch 2x2 array. Antena mikrostrip disc sector patch 2x2 array bekerja dengan frekuensi 2,4 GHz. Simulasi antena dilakukan menggunakan CST Studio Suites. Hasil pengukuran parameter antena diperoleh nilai return loss sebesar -36,034572 dB, gain sebesar 4,003 dB, VSWR sebesar 1,0320783, HPBW sebesar 80°, dan pola radias...

Pada penelitian ini dilakukan optimasi jaringan 4G LTE terkait pelaksanaan WFH yang menyebabkan kebutuhan payload data meningkat secara signifikan terutama didaerah perumahan. Optimasi dilakukan menggunakan measurement report dan user experience melalui metode drive test menggunakan software GENEX Probe.  Setelah dilakukan optimasi, Performansi meningkat dengan penambahan nilai RSRP meningkat dari   96.97% menjadi  98%, nilai CQI dari  63,98% menjadi 83,91%, nilai througput   16,862  kbps menjadi 17,448   kbps serta penambahan user dari 114 menjadi 122. Nilai yang didapatkan telah memenuhi standar KPI yang ditetapkan.

Saat ini perkembangan sistem keamanan ruangan berkembang dengan pesat. Begitu pula dengan perkembangan media transmisi yaitu jaringan FTTH, yang dapat dimanfaatkan untuk meningkatkan kualitas sistem keamanan ruangan. Face recognition atau pengenalan wajah adalah sebuah teknologi system keamanan yang digunakan dalam berbagai aplikasi dengan mengidentifikasi wajah manusia menggunakan gambar digital. Raspberry Pi digunakan sebagai mikrokontroler untuk menjalankan sistem pengenalan wajah ini dan menggunakan camera modul dari Raspberry Pi yaitu Pi Camera untuk memfoto pengguna ruangan. Sketch sistem ini menggunakan bahasa Phyton. Sistem keamanan ini menggunakan solenoid door lock yang berfungsi sebagai kunci ruangan. Pengenalan wajah ini melakukan pencocokan image dengan image yang berada di web server. Pengujian alat dapat mencocokan wajah dengan berbagai threshold kemiripan wajah Pada alat ini juga terdapat sistem back up untuk sistem keamanan ruangan dengan menggunakan PIN yang sudah ...

In this research, it is proposed to develop spectrum analyzer using RTL-SDR based on SDR Console 2. This device was then integrated with Android to do the real value calculation. The measurement results were then validated and regression was performed. The result of analysis shows that regression with linear approach has error of 4.84% second order error of 4.83%, third order error of 4.84% and fourth order error of 7.31%. Based on regression, the first order is chosen because the error value was still below 5% with the simplest equation.

Pada makalah ini dirancang antena mikrostrip berbetuk lingkaran berbasis substrat FR4 er = 4,3 dengan ketebalan h = 1,6 mm dan loss tan (tand) = 0.025. Sebagai state of the art, pada penelitian ini dusulkan peningkatan bandwidth dari antena mikrostrip lingkaran menggunakan metode beleved half cut. Metode beleved half cut diterapkan dengan memotong sebagian sisi patch dari antena mikrostrip. Antena lingkaran ini memiliki dimensi 85.8 mm x 59.8 mm dengan jari-jari patch sebesar 27.9 mm. Hasil perancangan menunjukan antena mikrostrip lingkaran ini memiliki kinerja frekuensi atas 3.00 GHz, frekuensi bawah 1.15 GHz, bandwidth 1.85 GHz,  gain 3.0 dBi, dan directivity 4.0 dBi. Antena ini kemudian dimodifikasi menggunakan metode beleved half cut dengan d(mm) paling optimal saat bernilai 16 mm. Hasil perancangan antena lingkaran dengan beleved half cut memiliki kinerja diantaranya frekuensi atas 3.30 GHz, frekuensi bawah 1.125 GHz, bandwidth 2.175 GHz,  gain 2.8 dBi, dan directivity 3.93 dBi...

Design High Efficiency Dual Layer microstrip Coupler for Application in Frequency LTE 2.3 GHz. In the study will be designed dual - layer coupler for LTE applications . As the state of the art , design dual - layer coupler to increase the catchment area of radiation so coupling factor and its directivity will increase. Other effects is low radiation loss so the signal power loss can be reduced .It will automatically increase the efficiency of the device . In more detail , this study discusses the design of a dual - layer microstrip coupler with high efficiency for LTE applications at frequency 2.3 GHz . In this study successfully demonstrated a dual - layer simulation results coupler for LTE applications using the Advanced Design System . The results obtained operating frequency of the design microstrip dual-layer coupler is 2.300 GHz , the output ports on port 2 is - 2.754 dB and at port 3 is - 3.298 dB , the second phase difference output of 90.038 ° , the magnitude of the return ...

This prototype is use to provide the information to people around the coast when the tsunami will occur. This prototype was made because there are many tsunami prone areas in Indonesia, especially the west coast of Sumatra. Until now, people still don’t understand the characteristics of tsunami and lack of tsunami early detection. This prototype works by utilizing the characteristics of the tsunami, the drastic decline of sea water. The prototype consists of two parts, the transmitter located at sea (tsunami detection) and receiver located on land (observation post). The detectior is made of buoys connected to the lever using a rope. When the appliance detects a tsunami, the lever will hit the switch and float drawn down to touch the sea floor, the process indicates the tide as a sign of tsunami will come. The transmitter sends a signal 108,7MHz using FM radio with FSK modulation. At the receiver, the analog signal is processed by the FM receiver and it become the data of tsunami de...

Magnetically coupled coils have been widely used for a variety of applications requiring contactless or wireless power transfer (WPT). In this paper, the wireless power transfer (WPT) using Copper (Cu) and Aluminium (Al) as magnetic coupling is designed, fabricated and measured. A main problem of wireless power transfer (WPT) is about low efficiency. As state of the art, this research will investigate the effects of the use of copper and aluminum as magnetic coupling. A Copper (Cu) and Aluminium (Al) are used as transmitter (Tx) and receiver (Rx) vice versa. A power analysis has been carried out to identify the efficiency system. The measurement result shown that the wireless power transfer (WPT) using aluminum as transmitter (Tx) and receiver (Rx) have the highest efficiency. The overall efficiency of the power being transferred is about 7,51%-10,8% at distance 20 cm. This research shown that aluminum can consider as a material for the wireless power transfer with magnetic inductio...

A multiwideband bandpass filter (MW-BPF) using a quad cross-stub stepped impedance resonator (QC-SSIR) was simulated, fabricated, and measured. The proposed QC-SSIR is designed on a four-series arrangement of crossed open stub (COS) structures where each open stub is developed with a step impedance resonator (SIR) structure to generate a wide bandwidth. Compared to the COS resonator, the QC-SSIR has a wider fractional bandwidth and good transmission coefficients and is compact. ABCD matrix analysis is used to investigate the filter structure. Furthermore, the MW-BPF is designed on an FR4 microstrip substrate with εr = 4.4, thickness h = 1.6 mm, and tan δ = 0.0265. The results show that the proposed MW-BPF using a QC-SSIR achieves transmission coefficients/fractional bandwidths of −0.60 dB/49.3%, −1.49 dB/18.7%, and −1.93 dB/13.9% at 0.81 GHz, 1.71 GHz, and 2.58 GHz, respectively. Furthermore, to reduce the filter size, a folded QC-SSIR (FQC-SSIR) structure was also proposed. The res...

Technology of 4G is a cellular technology improved from 3G and 2G which provide network with the bandwidth of 75MHz and operated frequency of 1800 MHz. In a process of receiving and sending information signal, 4G system need antenna as the device functioning to send electromagnetic to the air. When information signal is transmitted, there was possibility that the signal weaken which caused by several factors such as air, building wall thickness and weather. Rectangular circular patch array 1x8 microstrip antenna is an antenna functioning as 4G signal strengthens at the frequency of 1800MHz. Antenna was design by using software of CST Studio Suite. From the result of rectangular circular patch array 1x8 microstrip antenna measurement at the frequency of 1800 MHz, it was obtained that the gained was 7.32 dB, VSWR was 1.208, and return loss was -20.3 dB. Performance test of antenna was conducted for 4 Indonesia’s cellular providers namely Telkomsel, Indosat Ooredoo, XL, and 3 in variou...

The design of an enhanced gain compact circular microstrip antenna has been presented in this paper. This antenna is designed to operate at 2.35 GHz for Long Term Evolution (LTE) application with bandwidth 54 MHz at return loss (S11) = -14 dBi or VSWR < -1.5. The gain, return loss, and radiation characteristics of the proposed microstrip antenna are compared with the conventional circular antenna. A total gain enhancement 2 dBi is achieved by front-end parasitic element. The spacing between the driven patch and front-parasitic element (H1) is optimized to maximize electromagnetic coupling and main lobe antenna. This paper also propose end-parasitic, the spacing between the ground and end-parasitik element (H2) to minimize back lobe antenna. The designed antenna makes it a potential antenna for various applications.

ABSTRAK Pada penelitian ini diusulkan penggunaan Y-junction untuk dapat meningkatkan isolasi dan kualitas sinyal. Selain itu, dilakukan modifikasi pada Y-junction dimana salah satu cabang terhubung lurus, sedangkan cabang yang lain terhubung dengan membentuk 45dan diharapkan memiliki isolasi yang tinggi serta memiliki koefisien refleksi (VSWR) yang rendah. Perancangan mikrostrip diplexer digunakan untuk aplikasi WiMAX pada frekuensi 2,3 GHz dan 2,5 GHz. Hasil penelitian ini, mikrostrip diplexer yang dirancang sudah dapat menyaring dua frekuensi yaitu frekuensi 2,3 GHz dan 2,5 GHz dengan masing-masing bandwith 100 MHz, VSWR pada frekuensi 2,3 GHz senilai 1,297 dan pada frekuensi 2,5 GHz diperoleh nilai 1,672. Nilai return loss pada frekuensi 2,3 GHz bernilai -24,38 dan insertion loss bernilai -0,016. Sedangkan pada 2,5 GHz return loss bernilai -12,078 dan insertion loss bernilai -0,283. Dalam pengukuran daya, nilai antara daya input dengan daya output tidak jauh berbeda. Pada frekuensi 2,3 GHz dari simulasi diperoleh daya masukan sebesar - 66,985 dB dan daya keluaran sebesar - 67,43 dB. Demikian juga pada frekuensi 2,5 GHz dari hasil simulasi diperoleh daya masukan sebesar - 66,82 dB dan daya keluaran sebesar - 68,45 dB. Kata kunci : WiMAX, Diplexer, Transmiter, Receiver. ABSTRACT Design Diplexer for Mobile WiMAX at 2,3 GHz and 2,5 GHz using Y-Junction. In this study proposed Yjunction for diplexer to improve the isolation and signal quality. In addition, a modification to the Y-junction where a branch connects straight, while the other branch is connected to form a 45. This design expected to have a high insulation and has a coefficient of reflection (VSWR) is low. The design of microstrip diplexer used for WiMAX applications at frequencies 2.3 GHz and 2.5 GHz. The results obtain 100 MHz bandwidth, VSWR at the 2.3 GHz obtain 1.297 and at 2.5 GHz obtained 1.672. Return loss at 2.3 GHz and the insertion loss are - 24.38 dB and -0.016 dB. While at 2.5 GHz return loss and insertion loss are -12.078 dB and -0.283dB. In power measurements, the value of the input power to the power output is not much different. At the 2.3 GHz obtained from the simulation input power of - 66.985 dB and output power of - 67.43 dB. Similarly, at the frequency 2.5 GHz simulation results obtained input power of - 66.82 dB and output power of - 68.45 dB. Keywords: WiMAX, Diplexer, Transmiter, Receiver.

Covid-19 pandemic has affected the education sector. Having implemented physical distancing policy to stop virus transmission in the second semester of 2019-2020 made learning from home policy for school children by using internet access. Almost all schools undergo learning from home during pandemic covid-19 including schools in Depok, West Java. To protect student health conditions returning study at school, infrastructure for health and clean sanitary system must be strengthened. The telecommunication study program of the Electronic Engineering department of Politeknik Negeri Jakarta offers electric washing hand tools or electric washbasin at Islamic Madrasa Muhammadiyah 1, Beji Timur Depok. This elementary school is a partner for the community development program of the study program. Washbasins are placed in front of classes equipped with a water tap as well as an appropriate drainage system. Water tap is built by using an infrared sensor which is based on microcontroller Atmega...

Worldwide interoperability technology for mobile access (WiMAX) that can transfer data at high speed and wide coverage area. WiMAX technology has developed more into technology for mobile communications, called the mobile WiMAX using IEEE 802.16e standard with the working frequency of 2.3-2.4 GHz. Bandpass filter is used to select the frequency are based on the WiMAX standard specifications which have been determined to avoid interference with other channels for communication. Design of bandpass filter using Hairpin microstrip active filter with negative resistance circuit. Active components used are bipolar junction transistor (BJT) BFR-183, where the negative resistance circuit functions to compensate for losses caused by parasitic resistance and capacitance of the inductor component. Using Hairpin microstrip active filter has the advantage that the size becomes smaller, the losses caused by parasitic resistance becomes lower so that the Q factor can be improved and can be applied...