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All Journal Jurnal Elektronika dan Telekomunikasi Intan Husada : Jurnal Ilmiah Keperawatan
Sulistyaningsih -, Sulistyaningsih
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Electrical & Electronics Engineering Engineering Nursing

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Comparison of a Circular Patch Unit Cell Performance for Reflector Applications between Using FR4 and F4BMX220 Substrates at 3.5 GHz Frequency -, Taufiqqurrachman; Abdul Rahim, Muhammad Kamal; Mahmudin, Dadin; Adji, R. Priyo Hartono; Kurniadi, Deni Permana; Desvasari, Winy; -, Sulistyaningsih; Darwis, Fajri; Rahman, Arief Nur; Putranto, Prasetyo; Setiawan, Arie; Rizal, Aminuddin
Jurnal Elektronika dan Telekomunikasi Vol 23, No 2 (2023)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.587

Abstract

This paper presents a performance comparison of the circular patch unit cell as a unit cell for reflector application at 3.5 GHz frequency using a dielectric substrate between FR4 and F4BMX220 substrates. A circular patch is chosen as the unit cell of a reflector because it is commonly used, fabricated, and has a wider bandwidth compared to other structures. A performance comparison of the circular patch on both dielectric substrates is presented in a graph of S-parameters, reflection phase, and operating bandwidth, as well as in the table of dimensions, where the result is performed by simulation using CST software. Based on the simulated results, the F4BMX220 has a better performance compared to the FR4 in terms of the reflection value, operating bandwidth, and dielectric substrate thickness. However, a circular patch diameter when using the F4BMX220 is bigger than when using the FR4 substrate because the FR4 substrate has a higher dielectric constant than the F4BMX220, which is twice the F4BMX220 dielectric constant. Also, the F4BMX220 substrate has a narrower bandwidth compared to the FR4 substrate, which is a difference of around 0.1 GHz. The circular patch when using the F4BMX220 substrate has 0.96 of a reflection value, 0.007 of an absorption value, -6.77° of the reflection phase, and 0.24 GHz of the operating bandwidth at the normal incident wave angle (0°). Also, it can be properly worked if the incident wave angle is moving until 60°. The F4BMX220 substrate has the best performance compared to the FR4 substrate because the reflection value is much better value, even at the incident wave angle of 60°.
STUDI PENGARUH SUHU PENYIMPANAN TERHADAP KADAR ASAM LEMAK OMEGA-3 PADA AIR SUSU IBU (ASI) Aryani, Titin; Utami, Fitria Siswi; -, Sulistyaningsih
Intan Husada : Jurnal Ilmiah Keperawatan Vol. 4 No. 1 (2017): Vol. 4. No. 1 Januari 2017
Publisher : Politeknik Insan Husada Surakarta

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Abstract

Abstrak:Penelitian  kuantitatif  ini  bertujuan  untuk  mengetahui  pengaruh  suhu penyimpanan  terhadap kadar  asam  lemak  omega-3  pada  air  susu  ibu  (ASI). Analisa  data menggunakan  data kromatogram  Gas  Chromatography-Mass Spectrometry (GC-MS). Data  yang  dihasilkan  adalah air  susu  ibu  (ASI) tanpa perlakuan  penyimpanan  memiliki  kadar  asam  lemak  sebanyak  29,12%. Sedangkan  air  susu  ibu yang  disimpan  di  dalam  suhu Freezer (-20C) dan suhu Refrigerator (70C) pada kulkas satu pintu selama 1 minggu memiliki kadar asam lemak omega-3 berturut-turut sebesar 28,24% dan 16,43%. Penurunan kadar asam lemak  omega-3  pada  sampel  ASI  menunjukkan bahwa suhu  penyimpanan mempengaruhi kerusakan asam lemak omega-3 pada (ASI).  Kata kunci: air susu ibu, asam lemak omega-3, suhu penyimpanan
Co-Authors -, Taufiqqurrachman Abdul Rahim, Muhammad Kamal Adji, R. Priyo Hartono Aminuddin Rizal, Aminuddin arief nur rahman Dadin Mahmudin, Dadin Desvasari, Winy Fajri Darwis, Fajri Kurniadi, Deni Permana Nurwijayanti Putranto, Prasetyo Titin Aryani Utami, Fitria Siswi