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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga)
Eka Pratiwi
Politeknik Negeri Bandung
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Simulasi peningkatan kinerja broadband antena menggunakan material dielektrik artifisial dan defected ground structure: Simulation of improving the performance of broadband antennas using artificial dielectric materials and defected ground structure Hepi Ludiyati; Marisa Putri Supriadi; Ghania Yuntafa Putri; Eka Pratiwi
JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Vol. 1 No. 1: March 2021
Publisher : Jurusan Teknik Elektro, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1190.482 KB) | DOI: 10.35313/jitel.v1.i1.2021.79-88

Abstract

Antena merupakan perangkat telekomunikasi yang sangat penting dalam proses penerimaan dan pengiriman sinyal informasi. Operator telekomunikasi di Indonesia telah meluncurkan teknologi telekomunikasi 5G yang dapat melayani berbagai kebutuhan masyarakat. Untuk memenuhi semua kebutuhan layanan tersebut, diperlukan antena multiple input multiple output (MIMO) conformal yang memiliki bandwidth lebar dan gain  yang tinggi. Akan tetapi, sebuah antena MIMO konvensional memiliki bandwidth yang sempit dan gain  yang rendah. Penelitian ini bertujuan untuk meningkatkan kinerja broadband antena dengan menggunakan material artifisial dielektrik dan defected ground structure. Antena dirancang pada frekuensi 26 GHz dengan bandwidth di atas 500 MHz dan gain lebih tinggi dari 5 dBi. Penggunaan material dielektrik artifisial dilakukan dengan cara menyisipkan strip konduktor pada substrat antena, sedangkan penggunaan defected ground structure yaitu sebuah metoda pencacatan ground yang dapat memberikan dampak bandwidth yang lebih lebar. Berdasarkan simulasi menggunakan aplikasi CST Microwave didapatkan hasil parameter antena MIMO dengan artifisial dielektrik dan defected ground structure berupa gain sebesar 5,59 dBi, bandwidth sebesar 5,12 GHz, dan return loss pada frekuensi tengah sebesar 39,81 dB.
E-CityFarm: sustainable small-scale food production integrated fish and crop cultivation R. Wahyu Tri Hartono; Sakinah Puspa Anggraeni; Fajri Habibie Suwanda; Eka Pratiwi; Regina Nur Shabrina; Vina Fitriana
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 20, No 5: October 2022
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v20i5.24095

Abstract

E-CityFarm is an electronic system that can control the parameters needed to grow fish and plants integratedly. It can control temperature, water acidity, and utilizing the neural network method able to count the number and length of fishes also their weight. The weight will be directly proportional to the need for feed. In E-CityFarm, various variables are processed by multitasking, therefore real time operating system (RTOS) is used. RTOS has several advantages in terms of: concurrency, pre-emption, capacity, flash size, synchronization tools, third party software, and convenience. RTOS is real time where in the execution process it will work in parallel for all existing processes according to the time specified. E-CityFarm implements RTOS to improve and maintain the quality of system measurement accuracy, which is expected to help users maintain product quality. In several experiments, the measurement results still have deviations compared to conventional measurements, deviations in measurements for: temperature 0.46%, light intensity 1.935%, 4.93% (3 levels) and weight control 1.995% (98.005% accuracy). Within 14 months the growth of fish and plants seemed to be very controlled, fish and plants grew well, thus E-CityFarm is a feasible system to be developed in areas that have limited land and water.
Co-Authors Fajri Habibie Suwanda Ghania Yuntafa Putri Hepi Ludiyati Marisa Putri Supriadi Regina Nur Shabrina Sakinah Puspa Anggraeni Vina Fitriana W. Tri Hartono