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Koesmarijanto Koesmarijanto
Jurusan Teknik Elektro, Politeknik Negeri Malang
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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PERFORMANSI GAIN ANTENA PF1000S MENGGANTI ELEMEN DRIVEN K-SHAPE DENGAN ELEMEN BOW-TIE Koesmarijanto Koesmarijanto
Jurnal Ilmiah Flash Vol 4 No 2 (2018)
Publisher : P3M- Politeknik Negeri Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1199.359 KB) | DOI: 10.32511/flash.v4i2.294

Abstract

Antena sistem komunikasi nirkabel (wireless) merupakan perangkat yang berfungsi mentransmisikan sinyal dan sebagai penerima sinyal. Permasalahan utama pada komunikasi wireless yang diterima dibawah ambang level daya penerimaan. Salah satu antena jenis pf1000S yang dipasaran dimodifikasi dengan mengganti elemen drivennya dengan antena bow-tie. Untuk menunjukkan performa antena pf100S dan pf1000S modif dilakukan pengujian antara lain return loss, gain, pola radiasi, dan lebar pita ferkuensi. Pada penelitian ini dilakukan perancangan antena bowtie yang mempunyai sudut 60o dengan bidang frekuensi UHF 470 MHz - 860 MHz. Antena bow-tie hasil fabrikasi diuji di Laboratorium Radio Frekuensi Polinema, hasil simulasi frekuensi 638 MHz dengan RL -35,51 dB atau SWR 1,063. Untuk hasil dari pengukuran antena driven pf1000S pada frekuensi 584 MHz dengan RL sebesar -37,4 atau SWR sebesar 1,027, sedangkan antena bow-tie frekuensi 640 MHz dengan RL -39,9dB atau SWR 1,0204 yang mempunyai lebar bidang 230 MHz. Antena bow-tie mempunyai persentase lebar pita 34,59 %.
Telemonitoring Kadar EC pH dan Suhu Penyehatan Tanah Tercemar Menggunakan Sensor Konduktivitas Berbasis Web Rahmana Burchan; Farida Arinie Soelistianto; Koesmarijanto Koesmarijanto
Jurnal Jaringan Telekomunikasi Vol 10 No 4 (2020): Vol 10 No 04 (2020) : Desember 2020
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v10i4.7

Abstract

Environmental pollution is the most prominent issue today, along with the increase in population, it causes a lot of garbage piles. A chemical reaction that produces certain gases causes the accumulation of solid waste to rot. The aim of this research is to create a web-based soil health telemonitoring  system using EC sensors, pH sensors, and the web. The results of pH and EC measurements are taken and entered into a database and will be displayed on a web page. The Wemos D1 Mini microcontroller will process the signal read by the sensor and display it on the LCD and Web pages in real time. The results of the application of the system are carried out by plugging the two sensors into the soil to be measured, the results of the data that I took on this land with more colomite were the average EC and the pH on the soil was higher than the soil that was not dominated or had little domination due to the soil that was given dolomite. more will increase the EC and pH of the soil. Based on the results of tests carried out by the EC Soil Sensor and the temperature here can detect soil conductivity with an average value close to 400 µs / cm and an average temperature close to 24-26 ° C because this sensor has calibrated automatically, the pH sensor can detect the pH on the soil evenly 0% error rate.
Implementasi Transmisi Sinyal TV pada Media Transmisi Fiber Optik Singlemode Nadhia Syafira Arifianti; Yoyok Heru Prasetyo Isnomo; Koesmarijanto Koesmarijanto
Jurnal Jaringan Telekomunikasi Vol 10 No 3 (2020): Vol 10 No 03 (2020) : September 2020
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v10i3.12

Abstract

The results of TV service output using the Hybrid Fiber Coaxial system obtained a signal quality of 74% with a total of 49 channels. The attenuation with input 1 parabolic antenna receiver decoder using 200 cm fiber optic obtained a loss of 1.79 dB and at length of 2 km the loss is 8.91 dB. Whereas with the input of 2 decoder, a parabolic antenna receiver using 200 cm fiber optic, the value of losses is 1.93 dB and at 2 km the loss is 9.83 dB. The average deviation of RGB errors in the largest television image output results is Green by 0.226% and the lowest error deviation is Red at 0.148%. The effect of audio and video output before adding fiber optic devices is obtained, the audio output voltage value is 1.792 V and the video output voltage value is 2.591 V. After adding the fiber optic device the value of the output voltage with 1 television output and 1 decoder receiver at a length of 200 cm audio is 1.144 V and video is 1.167 V while at a length of 2 km the audio is 0.834 V and the video is 1.005 V.
Rancang Bangun Antena Semi Circular Dengan Teknik GDS (Defect Ground Structure) untuk Meningkatkan Bandwidth Antena Pada Aplikasi WIFI Trushero Kharisma Claudiani; koesmarijanto koesmarijanto; hendro darmono
Jurnal Jaringan Telekomunikasi Vol 11 No 1 (2021): Vol 11 No 01 (2020) : Maret 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i1.18

Abstract

The increasing need for the amount of data sent and the speed of data transmission via wireless technology has resulted in high interest in devices with wide bandwidth. Improving antenna design is one way to increase Bandwidth. The antenna is designed in such a way as to get the antenna parameters that are effective, one of which is to increase the antenna bandwidth. The techniques used to improve microstrip antenna parameters is the Defect Ground Structure (DGS) technique. The methods used are calculation, simulation and measurement. The results of the semicircular array microstrip antenna without DGS, the return loss parameter value is -13.7 dB and the VSWR value is 1.518 and has a gain of 1.3 dBi at a frequency of 2455 MHz. This antenna has the form of a bidirectional radiation pattern. The antenna bandwidth obtained is 14 MHz. The result of the semicircular array microstrip antenna with DGS, the return loss parameter value is -14.4 dB and the VSWR value is 1.469 and has a gain of 2.8 dBi at a frequency of 2455 MHz. This antenna has the form of a directional radiation pattern. The antenna bandwidth obtained is 10 MHz. The conclusion of this research is that the semicircular array microstrip antenna without DGS has a smaller bandwidth than the semicircular array microstrip antenna with DGS, which is a difference of 3.5 MHz.
Perancangan dan Analisa Antena Yagi 12 Elemen untuk Module Lora RFM95W pada Frekuensi 915 MHz Fajar Alviandi; Koesmarijanto Ko; Hendro Darmono
Jurnal Jaringan Telekomunikasi Vol 11 No 1 (2021): Vol 11 No 01 (2020) : Maret 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i1.34

Abstract

The purpose of this research is to design a 12 element Yagi antenna so that it can be applied to the Lora RFM95W module which works at a frequency of 915 MHz, to find the effect of signal reception power on the Lora module. In this study, the implementation of the yagi antenna and built-in antenna was tested in line of sight and non-line of sight. The 12-element yagi antenna test results obtained a Return Loss of -17.8 dBm and a VSWR value of 1.29. The average gain obtained is 5.6 dB. And the results of the implementation of the LOS state for a distance of 200 meters the yagi antenna has an RSSI value of -98 dBm, while the built-in lora antenna has a power level of -109 dBm. The second test results in a Non-LOS (Wall Obstruction) state at a distance of 25 m the built-in antenna has an RSSI value of -95 dBm, while the 12 element yagi antenna is -77 dBm. The test results in Non-LOS (Tree Obstacle) at a distance of 25 m the built-in antenna has an RSSI value of -84 dBm, while the 12 element yagi antenna is -78 dBm. So that in the implementation of the 12 element yagi antenna and the built-in antenna, it can be concluded that for the RSSI data, the directional yagi antenna is better than the omnidirectional lora RFM95W antenna built-in antenna.
Rancang Bangun Sistem Mode Persiapan pada Mobil Berbasis Mikrokontroler Alfan Tamamy; Koesmarijanto Koesmarijanto; Ridho Hendra Yoga Perdana
Jurnal Jaringan Telekomunikasi Vol 11 No 1 (2021): Vol 11 No 01 (2020) : Maret 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i1.38

Abstract

People want a vehicle that is ready to use without having to wait for long or in the sense that the performance of an activity can run efficiently. With a remote control that can control the vehicle remotely, activities in setup mode will be more efficient. In general, remote control is used in motorized vehicles using Infra-red or Bluetooth communication with communication distance 60meters. So we need LoRa module that has longer beam range. The purpose of research is to design remote control and receiver that can control the vehicle such as opening vehicle door lock,  activating the AC, to the starter mode on the car contact with a wider range of sending and receiving information. The results of research indicate that LoRa module has received signal strength value (RSSI) of -65dBm when LOS (line of sight) at distance 10meters and RSSI of -66dBm at non-LOS (non-line of sight) at the same distance. SNR of 9.25dB when LOS and SNR of 6.0dB when non-LOS at distance 10meters. The research results of sending and receiving remote control data have a maximum distance when non-LOS with obstacles 5mm thick glass and 20 cars is 100 meters with a received signal strength of -112dBm. It can be concluded that for non-LOS connectivity between the LoRa SX1278 has an effectiveness distance at 50meters with an RSSI value of -99dBm and an SNR of 0.25dB, for a LOS condition it has an effectiveness at distance 50meters with RSSI value of -96dBm and SNR of 9dB.
Implementasi Sistem Kontrol Temperatur Pada Proses Pemanggangan Ubi Cilembu Menggunakan Oven Berbasis Mikrokontroler Toni Agung Wicaksono; Aad Hariyadi; Koesmarijanto Koesmarijanto
Jurnal Jaringan Telekomunikasi Vol 10 No 3 (2020): Vol 10 No 03 (2020) : September 2020
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v10i3.59

Abstract

Indonesia has a famous sweet potato called Ubi Cilembu that has a chewy and attractive meat structure. The advantages of this sweet potato, if baked in an oven, will produce a sweet honey flavor. Cilembu Sweet Potato that does not taste honey when eaten will reduce the delicacy because during the roasting process using an oven, there is no temperature control system that causes not toasted properly. Since reversing Cilembu yams is still done manually which can be endangering workers if exposed to a hot part of the oven. Because of this, the researcher will make it easier for users to work on the cilembu sweet potato roasting process more effectively than an oven control system is made. The implementation system is done by entering the temperature setpoint value and the timer via the remote displayed on the LCD, then the data is sent using a wireless module when the oven's half-timer time will rotate automatically by using the servo metal gear. The results are carried out by using a remote temperature control in the oven by entering the temperature setpoint value and the timer via the remote displayed on the LCD, then the data is sent using the wireless module when the furnace timer half time in the oven will rotate automatically using a metal servo gear. The system performance is designed to work within 2 hours with a weight of 1 kg of cilembu sweet potato using a temperature of 100.50 ° C.
Studi Kasus Pengaruh Tower Seluler terhadap Penerimaan Siaran Televisi Daerah Padat Penduduk di Jalan Buring Dalam pada Kecamatan Klojen Kota Malang Patricia Alfira Jokhanan; Koesmarijanto Koesmarijanto; Hudiono Hudiono
Jurnal Jaringan Telekomunikasi Vol 11 No 2 (2021): Vol. 11 No 02 (2021) : Juni 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i2.96

Abstract

This study aims to analyze the effect of cell towers on the quality of TV broadcast reception in densely populated areas located on Jalan Buring Dalam Klojen District, Malang City. The results of this study are an analysis of the effect of the obstacle with the type of cellular tower on analog TV signaling, by comparing the measurement results and calculations obtained from the calculation of field strength received using the damping calculation based on Recommendation ITU-R P.1546-1 with the Okumura Hata method, and knife edge diffraction theory. In conclusion, the measurement results in the presence of cellular obstacle towers obtained an average difference between the Line of Sight and With Obstacle of 2,6525 dB with an obstacle distance of 15 m from the measurement point, and 4.548571 dB with a distance of 40 m. Estimated attenuation value - influenced by cellular tower diffraction with obstacle distance of 15 m from the measurement point of 41,1088 dB, and with a distance of 40 m of 36.67143 dB. The value of cellular tower attenuation based on measurements for the distance of 15 m from the obstacle obtained values of 2.6525 dB and for the calculation of 41,1088 dB Whereas the value of the cellular tower attenuation based on the measurement results for a distance of 40 m has an average of 4.548571 dB and for the calculation of 36.67143 dB.
Rancang Bangun Mouse untuk Penyandang Disabilitas Menggunakan Sensor MPU-6050 dengan Metode Kalman Filter sebagai Peredam Noise Putri Ayu Zartika; Mila Kusumawardani; Koesmarijanto Koesmarijanto
Jurnal Jaringan Telekomunikasi Vol 11 No 4 (2021): Vol 11 No 04 (2021) : Desember 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i4.244

Abstract

Problems that are often faced by people with physical disabilities are those who have limited hands, one of which is when they will use the computer. His inability to grip and use the mouse is often a barrier in using the computer. The purpose of the design of the tool is to provide facilities for people with disabilities to be able to use a mouse that will be moved based on head movements without noise interference caused by the MPU-6050 sensor. The results of the tests carried out show that designing a mouse with the MPU-6050 sensor has been successfully carried out, the MPU-6050 sensor by implementing a kalman filter as a noise reducer on the X axis has an accuracy value with an average error percentage of 0.09% and at Y angle is 0.12%. Data transmission from the mouse to the computer is done wirelessly using bluetooth HC-05 can receive data well as far as 12.5 meters with an error percentage of 0%. The button on the mouse that functions to perform the left click function when the button is bitten 1x, right click when the button is bitten 2x and click and hold to do a left click 2x or double click can run according to the command, has a 100% success rate.
Pengaruh Roasting Kopi Dampit Terhadap Nilai Permeativitas Relatif Kopi Dampit Septriandi Wira Yoga Yoga; Azam Muzakhim Imamuddin; Moh. Abdullah Anshori; Koesmarijanto Koesmarijanto
Jurnal Jaringan Telekomunikasi Vol 11 No 4 (2021): Vol 11 No 04 (2021) : Desember 2021
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jartel.v11i4.252

Abstract

The purpose of this study was to design a capacitive sensor system to investigate the effect of Dampit coffee roasting on the relative permeability of coffee. Where this relative permeability value will be used as a reference to determine the level of Dampit coffee roasting. The method used is to design an oscillator circuit, where a capacitive sensor is used as a component of the oscillator. The capacitive sensor is composed of 2 square copper plates with a side length of 10 cm. The distance between the copper plates varies from 2 cm, 3 cm, 4 cm, and 5 cm. The type of oscillator used in this study is an RC oscillator with 4049 CMOS IC. The results of this study indicate that dark roasted coffee has the highest frequency, the largest capacitor value, and the smallest permeability value. Increasing the distance between the copper plates increases the output frequency of the capacitive sensor. The average relative permeativity of dark coffee is 10.92; medium coffee of 12.45; and light coffee of 14.4.
Co-Authors Abdul Chalim Ahmad Baha'uddin Alfan Tamamy Ane Fany Novitasari Azam Muzakhim Imammudin Azam Muzakhim Imammudin Azam Muzakhim Imamuddin Fadholi Fajar Alviandi Farida Arinie Soelistianto Hadiwiyatno Hadiwiyatno Hariyadi, Aad hendro darmono Hudiono Hudiono Kusumawardani, Mila M. Syirajuddin M. Syirajuddin Moh. Abdullah Anshori Mohammad Taufik Nadhia Syafira Arifianti Nugroho Suharto Nurul Hidayati Patricia Alfira Jokhanan Putri Ayu Zartika Rahmana Burchan ridho hendra yoga perdana Septriandi Wira Yoga Yoga Sri Hudiarini Toni Agung Wicaksono Trushero Kharisma Claudiani Waluyo Widjajanti, Kristina Yoyok Heru Prasetyo Isnomo