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Herry Setiawan
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herrysetiawan@pnp.ac.id
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Politeknik Negeri Padang St. Kampus, Limau Manis, District Pauh, Padang City, Province West Sumatera, Zip code 25164. Indonesia
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Sumatera barat
INDONESIA
International Journal of Wireless And Multimedia Communications
Published by Politeknik Negeri Padang
ISSN : -     EISSN : 20472172     DOI : -
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering
Focus and Scope Jurnal Focus jowim journal focuses on wireless communication technology and its development The journal scopes include (but not limited to) the followings: Telecommunication Theory Internet Of Things Wireless Sensor Network Signal And Image Processing Wireless Communication Optical Fiber Communication Telecommunication And Computer Networks Antennas And Transmission Systems Artificial Intelligence Machine Learning
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 34 Documents
 1   2   3   4 
Design of Rectangular Patch Microstrip Antenna with Rectangular Slot on 2.4 GHz Ground plane for Wifi Application Permata Isra, Gebriola; Nasrul, Nasrul; Yulindon, Yulindon
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.3

Abstract

This research aims to design a rectangular patch microstrip antenna design with rectangular slots on the 2.4 GHz ground plane for Wi-Fi applications using CST Studio Suite 2019 software and antenna measurements using Vector Network Analyser. Some of the antenna parameters produced are return loss, bandwidth, VSWR, radiation pattern, and gain.  This antenna has a rectangular patch shape and has a ground plane that has a rectangular slot. The antenna is designed on a circuit board (PCB) with a permittivity of 4.6 and a thickness of 1.6 mm. The antenna is designed based on the characteristics of several antenna parameters, namely having a return loss-10 dB gain value ≥1 dB, and VSWR < 2 dB. After several simulations, the results at a frequency of 2.4 GHz obtained a return loss value of -14.84 dB, a bandwidth of 53 MHz, a VSWR value of 1.442, a gain of 2.063 dbi, and has a Unidirectional radiation pattern. The measurement of the fabricated microstrip antenna using a Vector Network Analyser shows a return loss value of -11.68 dB, and a VSWR of 1.747 dB.
Microstrip Antenna with a Defective Ground Structure (DGS) Motor for Wireless Fidelity Applications (Wi-Fi) at 2.4 GHz Firdausa, Azizah; Nawi, Nasrul; Septima, Uzma
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.4

Abstract

Wireless fidelity (WiFi) is a wireless connection using radio technology so that users can transfer data quickly and safely. However, at a certain distance there is a decrease in signal speed on WiFi, as happened in Tursina's rented house located in Pasar Baru. When away from WiFi, the internet speed will decrease and the connection becomes unstable. Therefore, an antenna that has a high gain is needed in the form of a microstrip antenna with a working frequency of 2.4 GHz. This final project aims to design a microstrip antenna with the Defected Ground Structure (DGS) method for wireless fidelity (WiFi) applications at a frequency of 2.4 GHz, and analyse antenna parameters such as return loss, VSWR, bandwidth, gain, and radiation pattern. Where the antenna design uses CST Studio Suite 2019 software. After the simulation results are as desired, then fabrication or manufacture of the antenna is carried out. The simulation results after optimising are return loss -40.79 dB, VSWR 1.019, bandwidth 543.9 MHz, gain of 1.312 dBi and bidirectional radiation pattern. After the simulation is carried out, the next fabrication or manufacture of the antenna. In the measurement of the fabricated microstrip antenna using Vector Network Analyser shows a return loss value of -16.07 dB and VSWR 1.375. the measurement results of the fabricated antenna meet the specifications of a good antenna for WiFi applications.
11-Element Yagi Antenna for 1800 MHz Frequency Rekha hamdila, Fannia; Nawi, Nasrul; Nita, Sri; Noer, M; Yani, Herman
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.5

Abstract

The need for internet connection is very important because everything is connected to each other with the internet, but due to limitations on access points, many areas are still experiencing difficulties in accessing the internet, one of which is the suburban area. Suburban areas that are indicated to be still difficult to reach due to obstacles from buildings, and the influence of weather. In order for the signal to be reached in this area, an 11-element yagi antenna with a working frequency of 1800 MHz is needed which is expected to produce a high gain so that the antenna beam is maximised. This final project aims to design an 11-element Yagi antenna at a working frequency of 1800 MHz, and analyse antenna parameters such as return loss, VSWR, bandwidth, gain, and polaradiation. Where the design of the yagi antenna uses CST Studio Suite 2019 software. After the simulation results are as desired, then fabrication or manufacture of the antenna is carried out. The simulation results after optimising are -26.00 dB, VSWR 1.10, and gain 12.32 dB. After the simulation is carried out, the next fabrication or manufacture of the 11-element Yagi antenna, the measurement obtains a return loss value of -11.29 dB, and VSWR 1.74, although the measurement results are far from the simulation but the results of this measurement have met the requirements of the antenna specifications.
Implementation Of Internet Of Things (Iot) Based Lecture Schedule In Building G Floor 3 Padang State Polytechnic Wulandari, Anggelina; Lifwarda, Lifwarda; Firdaus
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.6

Abstract

The internet of things-based lecture schedule aims to improve the efficiency and effectiveness of time management. Thus, students, lecturers, and staff can know the time change so that they can prevent delays. By using Arduino Uno as the main component microcontroller, RTC as a clock module that calculates the time that will be displayed on the LCD. Bell and Speaker will sound when the clock on the RTC is the same as the inputted schedule clock, then sent to IoT via the ESP01 wifi module. This tool can also be used as a medium for delivering information because it is equipped with a mic. The RTC in this tool successfully calculates the time according to real time where the Bell and Speaker can work on time according to the schedule. When the bell sounds the measured voltage is 225 volts while the speaker is 2 volts. This tool has also been connected to ThingSpeak using the ESP01 wifi module.  
Yagi Antenna With Three Reflector Elements to  Amplify 4G Signal In Suburban Areas Rianto, Rianto; Nawi, Nasrul; malkis, lince
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.7

Abstract

As the number of cell phone users increases and the high cost of 4G network infrastructure, the investment needed to build 4G infrastructure is Rp. 278 trillion, so that many suburban cell phone users (suburban areas) get 4G access with poor network quality. So it requires a repeater as an effective solution with a small capital to increase the coverage area in weak signal areas. Yagi antenna is an antenna suitable for long-distance communication with three reflector elements to strengthen 4G signals in suburban areas at a frequency of 1710-1880 MHz. The material for making the antenna consists of aluminum pipe as a reflector element and a director element with a diameter of 8.4 mm and wire as a driven element with a diameter of 4 mm. In the manufacture there is the addition of a balun supply and three reflector elements which can improve the performance of the parameters of the yagi antenna. Yagi antenna testing is carried out in two ways, namely the Anechoic Chamber room and the Telecommunication Electronics Lab. In this test, the transmitter uses a dipole antenna. and for the transmission cable, use a high school connector cable to operate the Anechoic Chamberm device designated by a female student who has been trained in measurements using the Network Analyzer software. From the results of manual measurements and the Network Analyzer, the results of a unidirectional radiation pattern are obtained, the maximum power level is -23.24 dBm, the frequency resonance 1809 MHz, Bandwidth 52 MHz, HPBW 〖25〗^0, FBR 12.97 dB, Gain 8.572 dB, VSWR 1.09, and Return loss -26.6 dB design using MMANA-GAL software simulation shows that the antenna works at frequency 1,800 MHz, antenna impedance 42.84 + j2,906 Ω, VSWR 1.18, Gain 20.66 dB, and FBR 23.77 dB and has a unidirectional radiation pattern
Rectifier Antenna (Rectenna) Microstrip Rectangular Patch Slot Horizontal On Television Signal Reception With Ultra High Frequency (UHF) Channeled Nasrul, Nasrul; Yuhanef , Afrizal; Hanum, Latifah
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.8

Abstract

This study aims to design and test a Rectangular miscrostrip Rectifier antenna for  television signal reception in the Ultra High Frequency (UHF) pathway. The research method includes designing antenna designs and designing Voltage Multiplier rectifier circuits. The antenna  parameters  measured include working frequency,  Return Loss, Bandwidth, VSWR, Antenna Impedance, Polarization, and Gain. The results showed that  the Return Loss  value in the frequency range of  540-884 MHz had a value of ≤-10dB, with the lowest value of -26,868 dB at a frequency of 598 MHz in the simulation results. After fabrication,           the Return Loss  value in the frequency range of 632-785 MHz has a value of ≤-10dB, with the lowest value of -42,375 dB at a frequency of 668 MHz.   or transmissions  connected to it. The antenna impedance  was 50.60Ω in the  simulation results  and 51.107 Ω in the measurement results.
Serial Rectifier Antenna (Rectenna) Microstrip Patch Circular 2.4 Ghz For Radio Frequency Energy Harvester Friska, Nadya Friska; Nasrul, Nasrul; Vitria, Rikki
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.9

Abstract

The source of Radio Frequency  (RF) electromagnetic wave energy in the atmosphere is currently abundant and wasted due to the rapid development of RF technology today. Utilizing the rectenna system to harvest energy, this RF energy source can be used as an environmentally friendly distribution method. To improve the rectenna's ability to convert electromagnetic waves into direct voltage (DC) sources, a rectenna antenna  system was designed using a serial rectenna system. using 3 antennas and 3 rectifier circuits, to design a  serial rectenna system. A circular patch microstrip antenna with a frequency of 2.4 GHz is used in serial receiving systems to receive WiFi signals.  Schottky 2860 diodes and 1nF smd capacitors are used in the 6-stage voltage multiplier of the rectifier circuit,  which is used in the rectifier.  Round patch microstrip antennas were found to be capable of capturing and directing voltage to DC through testing and measurement of rectenna serial systems. The system antenna has return loss values of -26.29 dB, -21.75 dB, and -28.57  dB,  VSWR 1.11,  1.16, and 1.07,  impedance 51.1,  55.56, and    50.22, and bandwidth of 60 MHz .  The resonant frequencies for 60 MHz and 50 MHz are 2.42 GHz, 2.36 GHz, and 2.48 GHz. so that at a distance of 25 cm a single rectenna system produces a voltage of 51 points 3 mV. During this time, the serial receiver system can change a direct voltage of  151.08 mV at a distance of 25 cm from the Access Point transmitter source.
Comparative Analysis Of 4G LTE Network Quality At 900 Mhz And 2100 Mhz Frequencies Putra, Ditto; Yuhanef , Afrizal; Chandra, Dikky
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.10

Abstract

4G networks were created to provide excellent service and fast data transmission. The goal is to promote better reception, maintain smooth data flow, and speed up information exchange. Indonesia has six mobile operators, each of which has the right to use the radio frequency spectrum to deploy mobile network services. The radio frequencies used are divided into 450 MHz, 850 MHz, 900 MHz, 1,800 MHz, 2,100 MHz, and 2,300 MHz. This research focuses on the comparison of 4G LTE network quality at 900 MHz and 2100 MHz frequencies. Data collection is done by conducting a drive test and using the dedicated mode method. The software that is utilized for data processing are TEMS Pocket and TEMS Discovery Device. The network quality of both frequencies is measured based on RSRP, SINR, and Throughput parameters. The results of network quality measurements were obtained for the 900 MHz frequency, namely, RSRP worth 79.54%, SINR worth 65.69%, and Throughput worth 37.65%. While the frequency of 2100 MHz, namely, RSRP is worth 82.1%, SINR is worth 76.84%, and Throughput is worth 72.18%. Of the two frequencies, the 2100 MHz frequency has a better value than the 900 MHz frequency.
Design and Build of a Blynk-Based Automatic Cat Food and Drinking Water Dispenser Ani, Gus Erniati; B, Firdaus; Yulindon
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.11

Abstract

Abstract — There are many people who like to keep cats. When keeping cats, the things you need to pay attention to are eating and drinking so that the cat's health is maintained. As it should be, food and drinking water must be given according to the dosage. However, if the cat owner is outside the house, it will make it difficult for the owner to feed and drink it. Through this final project, cats can eat and drink at any time by implementing the Internet of Things called an automatic dispenser. Automatic food and drinking water dispenser uses NodeMCU8266, 2 servo motors, 2 ultrasonic sensors, HX711 load cell and Blynk software. The Blynk software functions to display the on/off switch, the distance the cat is approaching, the amount of food and drinking water available in the cat food and drinking water dispenser which is connected via nodeMCU8266 which can be accessed on the cat owner's smartphone. If the food and drinking water is less than capacity, a notification will immediately appear on the cat owner's smartphone and email.
Design and Build Microstrip AntennasMultiple Input Multiple Output (MIMO) Wideband Elements  For WIFI Access-point Applications Haifa, Muthia; Adila A, Aprinal; Maria, Popy
International Journal of Wireless And Multimedia Communications Vol. 1 No. 1 (2024): International Journal of Wireless And Multimedia Communications
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62671/jowim.v1i1.12

Abstract

Technology in the field of telecommunications continues to experience development. One of them is the Multiple Input Multiple Output (MIMO) antenna used in WIFI access point applications using the MIMO technique to increase the need for large amounts of data transfer. In  designing and  manufacturing MIMO antennas for WIFI access point applications with a size of 110 mm x 112 mm using FR-4 substrate specifications with a thickness of 1.6 mm. The antenna consists of four ports and in each corner of the groundplane there are four slots to achieve good isolation and produce good bandwidth. The antenna simulation produces a bandwidth of 1.0516 GHz with a frequency of 2.4 GHz, return loss -12.78 dB, isolation -16.08 dB, and VSWR 1.53 dB. Meanwhile, fabricated antennas produce bandwidth of more than 100 MHz with a frequency of 2.4 GHz, return loss -13.5 dB, isolation -18.8 dB, and VSWR 1.29 dB. Antenna simulation using the CST Studio Suite 2019 software application

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