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All Journal IJITEE (International Journal of Information Technology and Electrical Engineering) Fokus Elektroda: Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Mitra Akademia: Jurnal Pengabdian Masyarakat SPEKTRAL : Journal of Communications, Antennas and Propagation Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Shita Fitria Nurjihan
Politeknik Negeri Jakarta
Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences

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DESAIN ANTENA MIKROSTRIP E-SHAPED PATCH PADA FREKUENSI 5500 MHz UNTUK WIFI Ananda, Fitri Elvira; Nurjihan, Shita Fitria; Rahman, Muhammad Arif
Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Vol 6, No 4 (2021): Jurnal Elektroda Vol 6 No 4
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jfe.v6i4.20272

Abstract

Modifying the shape of the patch microstrip antenna is one way to solve the narrow bandwidth. E-Shaped patch microstrip antenna is obtained by modifying a rectangular patch mikrostrip antenna. The results on this research have succesfully compared the design and simulation antenna parameters between rectangular patch and E-shaped patch. It uses FR-4 as a substrate and works on 5500 MHz frequency for WiFi. The feeding method using a feedline method. The E-shaped patch microstrip antenna has a VSWR value of 1.04 and the antenna return loss is -33.73 dB, better than the rectangular patch. The gain of E-shaped patch is increased by almost 2.5 times and the bandwidth is increased by 10.18% compared to the rectangular patch. The radiation pattern of the two patches has the same directional radiation pattern.
Rancang Bangun Antena Mikrostrip Patch Serangga untuk Aplikasi Monitoring Komposter pada Frekuensi 2,4 GHz Muhammad Faris; Shita Fitria Nurjihan
Spektral Vol. 1 No. 1 (2020): Oktober 2020
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v1i1.3435

Abstract

Komposter merupakan alat untuk menampung kompos. Kompos sangat dibutuhkan oleh masyarakat khususnya yang gemar bercocok tanam. Dengan adanya alat monitoring komposter ini memudahkan masyarakat untuk mengecek suhu dan kelembapan dari kompos. Data suhu dan kelembapan dari kompos dikirimkan dari bagian pengirim ke bagian penerima menggunakan sebuah antena mikrostrip dengan bentuk patch serangga. Antena mikrostrip patch serangga bekerja pada frekuensi 2,4 GHz. Antena mikrostrip patch serangga merupakan pengembangan dari patch rectangular, sehingga dalam perhitungannya menggunakan rumus dasar antena patch rectangular. Perancangan dan simulasi antena dilakukan menggunakan software CST Studio Suite 2018. Simulasi dilakukan dengan melakuakn percobaan mengubah dimensi antena sehingga didapatkan hasil parameter yang terbaik. Parameter antena yang diukur adalah Voltage Standing Wave Ratio (VSWR), return loss, gain, dan pola radiasi. Hasil pengukuran parameter antena yang diperoleh yaitu VSWR sebesar 1,0772, return loss sebesar -28,5954 dB, gain sebesar 4,249 dB, dan pola radiasi bidirectional.
Desain Antena Mikrostrip Double Triangular Patch dengan Slot Y untuk Aplikasi Penguat Sinyal 4G pada Frekuensi 1800 MHz Yenniwarti Rafsyam; Alica Dewanti; Shita Fitria Nurjihan
Spektral Vol. 2 No. 1 (2021): April 2021
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v2i1.3700

Abstract

Long Term Evolution (LTE) is 4th generation (4G) technology that used as cellular technology. LTE works in various bands, one of band is 1800 MHz. At each location, the signal level that will received by the user varies depending on the usage location. At indoor location, signal level will weaken due to passing the obstacle like trees or walls, so the signal level that the user receivers is less than the maximum. To improve this condition, a repeater is needed. A repeater need an antenna as a signal receiver that transmitted from eNodeB and an antenna for transmitting a signal that has been amplified. In this paper will be explained about design an antenna microstrip double triangular patch with slot Y as an indoor antenna that used for transmitting a signal that works at frequency 1800 MHz. Micostrip antenna that was fabricated and tested has specification value is obtained which are return loss = - 20,702 dB, VSWR = 1,1566, gain = 6,9 dB, and the radiation pattern is unidirectional. Signal level antenna testing is performed on three location by using four provider. The highest signal level gained by Telkomsel provider that is -77 dBm and the lowest is XL provider that is -100,6 dBm.   Keywords : 4G, antenna, frequency 1800 MHz, microstrip, patch double triangular, signal level
Rancang Bangun Filter Bandpass Mikrostrip Pita Sangat Lebar Berbasis Defected Ground Structure Shita Fitria Nurjihan; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 9 No 1: Februari 2020
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1238.439 KB) | DOI: 10.22146/jnteti.v9i1.119

Abstract

Along with the rapid development of technology, many techniques have been employed to improve filter performance by using microstrip, one of them is using a Defected Ground Structure (DGS) technique. The DGS is a technique implemented by combining various forms of slot on the ground-plane of filter. This paper presents an ultra wideband (UWB) filter designed using DGS technique by combining two kind of slots on the ground plane, i.e., rectangular slot and rectangular ring slot. The design of composed filter is initialized using filter without DGS, then by adding two kinds of DGS on the ground plane. The DGS is used to improve S-parameter values and increase bandwidth. The method of filter design is using several parametric studies, such as changing the length of patch, width of patch, number of rectangular slot, length of rectangular slot, width of rectangular slot, and gap in rectangular ring slot. This filter is fabricated on a FR4 epoxy dielectric substrate with the thickness of 0.8 mm and the size of 27.4 mm x 22 mm. The measurement result shows that the filter could produce the working bandwidth of 4.01 GHz in the frequency range from 1.52 GHz to 5.53 GHz.
PEMANFAATAN ALAT UKUR INDEKS MASSA TUBUH BERBASIS ANDROID UNTUK EVALUASI GIZI BALITA Shita Fitria Nurjihan
Mitra Akademia: Jurnal Pengabdian Masyarakat Vol. 5 No. 1 (2022): Mitra Akademia
Publisher : Unit Penelitian dan Pengabdian kepada Masyarakat (UP2M) Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/mapnj.v5i1.4168

Abstract

Kader posyandu mempunyai tugas memberdayakan dan memberikan kemudahan kepada masyarakat guna memperoleh pelayanan kesehatan bagi ibu, bayi, dan anak balita. Saat ini, para kader Posyandu Anyelir di Kelurahan Pancoran Mas Depok mempunyai permasalahan penting terkait dengan mutu layanan yaitu dalam kegiatan pemantauan kualitas gizi balita seperti pengukuran massa tubuh dan tinggi badan. Kegiatan tersebut dilakukan secara bertahap dan masih manual menggunakan timbangan yang digantungkan dengan kain atau timbangan konvesional dan alat meteran secara manual untuk mengukur tinggi badan. Dengan adanya dua alat yang berbeda, maka proses kedua pengukuran ini memerlukan dua tahap pengukuran yaitu menimbang massa tubuh dan kemudian mengukur tinggi badan. Hal ini menyebabkan proses pengukuran memerlukan waktu yang lebih lama, terlebih lagi jumlah balita di Posyandu Anyelir cukup banyak yaitu ±426 balita. Oleh karena itu tim pengabdian kepada masyarakat Program Studi Telekomunikasi memberikan solusi sebuah alat pengukur massa tubuh dan tinggi badan yang terintegrasi dengan aplikasi android untuk mengevaluasi gizi balita. Dengan menggunakan alat ini maka kegiatan pemantauan kualitas gizi balita dapat lebih efektif dan hasil evaluasi gizi balita tercatat secara otomatis pada aplikasi android sehingga mempermudah dan meningkatkan kualitas pelayanan kesehatan kader posyandu kepada masyarakat.
Ultra-Wideband Microstrip Bandpass Filter and Its Equivalent Circuit Shita Fitria Nurjihan; Yenniwarti Rafsyam
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 5, No 2 (2021): June 2021
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijitee.65695

Abstract

Microstrip filters can be designed with various methods to obtain good performances, such as defected ground structure, open-ended slot, planar edge coupled, and split ring resonator with groundplane windowing. In this paper, the design of an ultra-wideband microstrip bandpass filter used the defected ground structure (DGS) method by adding a circular slot to the groundplane. The addition of the circular slot was carried out to improve the value of S parameter (return loss and insertion loss) from the initial filter design without a circular slot. In the simulation process, optimization was carried out by changing the value of filter component parameters such as patch length and thickness and circular slot width. The simulation results showed that the microstrip bandpass filter could pass frequencies in the range of 1.4 GHz to 5.7 GHz with the bandwidth response of 4.3 GHz. In addition, filter analysis could also be done with an equivalent circuit represented by lumped element components in the form of capacitors and inductors connected in series or parallel. The simulation results of the equivalent circuit had a wider bandwidth, which was able to pass frequencies in the range of 1.2 GHz to 6.1 GHz with a bandwidth response of 4.9 GHz.
Rancang Bangun Sistem Penyiraman dan Perawatan Tanaman Geranium Terintegrasi Telegram Rizki Azka Fihi Aghnia; Annisa Shafira Darmawan; Shita Fitria Nurjihan; Ardina Askum
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4528

Abstract

As a tropical country, Indonesia has a rainy season where there can be mosquito breeding which is quite dangerous for humans. There are several ways to deal with it, one of which is by growing your own geranium plants at home. To make it easier to water these plants, we need a system that can do it even if the planter is not at home. Thus, a system was designed using the Internet of Things (IoT) concept, so that watering plants can be done remotely and water savings can be realized. The system consists of a NodeMCU microcontroller which is connected to the Telegram application as an interface to the user. The three sensors used as input components of the system are the DHT22 sensor to measure the ambient temperature, the soil moisture sensor to measure soil moisture, and the magnetic float sensor to measure the water supply. The output components used are water pumps and servos. The system is powered by a DC power supply with an output voltage of 12 V to power the water pump and 5 V to power the NodeMCU. The results of testing the tool show that the tool works well. The system works when the humidity level is below 80% will automatically carry out the watering process, at temperatures above 32oC  the paranet can be lowered, and when the water is full or empty, the water supply can be detected accurately. NodeMCU can connect to the Telegram application with the help of a Telegram Bot library called CTBot that allows users to receive information and give orders. Keywords : soil moisture, plant watering, paranet, temperature
Co-Authors Achmad Munir Alica Dewanti Ananda, Fitri Elvira Annisa Shafira Darmawan Ardina Askum Muhammad Faris Rahman, Muhammad Arif Rizki Azka Fihi Aghnia Yenniwarti Rafsyam