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Emitor: Jurnal Teknik Elektro
Published by Universitas Muhammadiyah Surakarta
ISSN : 14118890     EISSN : 25414518     DOI : -
Core Subject : Engineering,
Electrical & Electronics Engineering
Emitor: Jurnal Teknik Elektro is a scientific journal published by the Department of Electrical Engineering, Faculty of Engineering UMS with a goal as the media of scientific publications in the field of all electrical engineering's covering the field of Electric Power System (STL), System Alerts and Electronics (SIE) that includes Electronic, Telecommunications, Computing, Control, Instrumentation, Medical Electronics (biomedical) and Computer and Information Systems (SKI).
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol 22, No 2: September 2022" : 12 Documents clear
Prototipe Detektor Gejala COVID-19 Berbasis IoT Muhammad Chafidh Dinulloh; Muhammad Kusban
Emitor: Jurnal Teknik Elektro Vol 22, No 2: September 2022
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v22i2.19441

Abstract

Kesehatan sangatlah berperan penting dalam kehidupan kita, sehat adalah salah satu kunci awal untuk meraih kedamaian, keamanan, dan kebebasan untuk melakukan apapun didalam hidup. Namun, meskipun kita semua sudah mengetahui hal tersebut, fenomena COVID-19 yang terjadi beberapa tahun terakhir menambah lagi kepekaan kita tentang seberapa berharga dan pentingnya kesehatan. Menurut data WHO, telah tercatat 6,2 juta kasus COVID-19 di Indonesia sedang 156 ribu diantaranya tidak dapat diselamatkan. Menurut beberapa penelitian, COVID-19 memiliki tiga gejala utama, yaitu demam, batuk, dan sulit bernafas atau sesak sehingga butuh penanganan secepatnya dari pihak kesehatan. Dari beberapa permasalahan tersebut, penulis membuat sebuah alat yang dapat mengukur suhu, denyut jantung, dan kadar saturasi oksigen yang dapat dimonitoring dari jarak jauh menggunakan aplikasi Blynk pada smartphone. Pada pembuatan alat ini penulis menggunakan dua buah mikrokontroler yaitu Arduino UNO dan NodeMCU juga menggunakan dua buah sensor yaitu sensor MLX90614 dan sensor MAX30100. Sensor MLX90614 akan digunakan untuk mengukur suhu tubuh, sedangkan sensor MAX30100 digunakan untuk mengukur denyut jantung dan saturasi oksigen. Hasil pengukuran nantinya akan ditampilkan pada LCD 20x4 dan juga akan ditampilkan pada smartphone menggunakan aplikasi Blynk. Hasil pengujian secara keseluruhan menunjukkan bahwa alat bekerja cukup baik dengan persentase error 3,4% pada suhu tubuh, 1,8% pada denyut jantung, dan 3,21% pada saturasi oksigen.
Rancang Bangun Antena Mikrostrip MIMO 4 Elemen Untuk Komunikasi 5G Pada Frekuensi Band N40 Fannush Shofi Akbar; Aulia Saharani
Emitor: Jurnal Teknik Elektro Vol 22, No 2: September 2022
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/emitor.v22i2.19491

Abstract

This study discusses the design of the MIMO microstrip antenna which is implemented in a 5G communication system that works on the N40 frequency band (2.3-2.4 GHz) with the center frequency of 2.35 GHz. The parameters that are unique of this antenna is focusing on the mutual coupling and correlation of MIMO antennas. The MIMO configuration was chosen because it can meet the high data transmission needs of 5G communication systems. The antenna is composed of a square patch with a microstrip insert feed-line technique. Then, the substrate uses FR-4 material, with a dielectric constant value of 4.3. After the design of a single element antenna that works according to the criteria is obtained, then the antenna is arranged into a configuration of 4 parallel elements, a 2×2 MIMO configuration with uniform polarization, and a 2×2 MIMO configuration with non-uniform polarization. After the design process, the antenna design is fabricated and then measured using a Vector Network Analyzer (VNA). The analysed antenna parameters are return loss, mutual coupling, Voltage Standing Wave Ratio (VSWR), bandwidth, and radiation pattern. From the element measurement results, it is found that the return loss is -11.24 dB and the bandwidth is 70 MHz at the center frequency of 2.35 GHz. As for the analysis of mutual coupling between elements, the best results were obtained from the MIMO configuration of 2×2 non-uniform polarization with values -20 dB for all elements. The antenna measurement results obtained indicate a similarity with the simulation results. This result is suitable for MIMO applications that require very low mutual coupling and correlation between elements.

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