EVALUASI KINERJA MULTI ANTENA MIKROSTRIP 2,4 GHZ DIRECTIONAL UNTUK APLIKASI KOMUNIKASI NIRKABEL

Dalam beberapa tahun terakhir, komunikasi nirkabel telah menggunakan antena patch mikrostrip sebagai komponen umum dalam sistemnya. Makalah ini menyajikan rancangan susunan patch mikrostrip paralel di insert untuk beroperasi pada frekuensi narrowband untuk komunikasi nirkabel. Multi Antena Mikrostrip 2,4 GHz Directional Sangat penting dievaluasi dalam konteks ini karena secara signifikan multi antenna memberikan dampak signifikan pada sistem komunikasi yang memanfaatkan multi input dan multi output. Penguatan yang tinggi diperoleh dengan menggunakan patch persegi yang mudah di duplikasi dan diimplementasikan. Hal ini menunjukkan bahwa antena yang di evaluasi kinerja paramternya sangat penting. Beberapa parameter antena seperti pola radiasi dan gain untuk satu dan multi antena diplot dan didapatkan hasil yang baik. Perangkat lunak simulator struktur frekuensi tinggi (HFSS) telah digunakan untuk mendapatkan hasil eksperimen. Sebagai bahan substrat, digunakan FR4 yang mempunyai konstanta dielektrik 4,2.Kata kunci : Antena, Miikrotrip, Multiantena, Nirkabel.In recent years, wireless communications have used microstrip patch antennas as a common component in their systems. This paper presents the design of an inserted parallel microstrip patch array to operate at narrowband frequencies for wireless communications. 2.4 GHz Directional Microstrip Multi Antenna It is important to evaluate in this context because multi antennas have a significant impact on communication systems that utilize multiple inputs and multiple outputs. The high gain obtained by using a square patch is easy to duplicate and implement. This shows that the antenna performance parameters evaluated are very important. Several antenna parameters such as radiation pattern and gain for single and multiple antennas were plotted and good results were obtained. High frequency structure simulator software (HFSS) has been used to obtain the experimental results. As a substrate material, FR4 which has a dielectric constant of 4.2 is used.Keywords: Antenna, Microtrip, Multiantena, Wireless

Directional 1900 mhz square patch ring slot microstrip antenna for WCDMA

Telecommunications systems especially WCDMA networks, require an antenna to convert electromagnetic energy in the air into electrical energy will be processed into the information signal. WCDMA (Wideband Code-Division Multiple Access) network works at a frequency of 1900 MHz with a complicated configuration antenna and has high-cost components. Directional 1900 MHz Square Patch Ring Slot Microstrip Antenna for WCDMA has been proposed. This is a novel technique in telecommunication configuration to make directional antenna use more proper and efficient component by using low cost and easy to find material at 1900 MHz frequency. This compact configuration consists of a single rectangular patch, a substrate, a ground plan and ring slot on the ground plane. This antenna produces an accurate frequency at 1900MHz with the value of -15.19 dB and gains 6.78 dBi at. The overall size of the proposed antenna is 55.7 mm times 49.2 mm with FR4 (Phenolic White Paper) with a dielectric constant value is 4.4

Tren penelitian pendidikan sains-agama Indonesia

Artikel ini memperlihatkan tren penelitian di bidang pendidikan sains-agama yang diterbitkan jurnal-jurnal di Indonesia. Pencarian artikel dilakukan melalui berbagai pengindeks artikel ilmiah dengan menggunakan beberapa kata kunci terkait. Pencarian tersebut mendapatkan 103 artikel jurnal dari 72 jurnal di Indonesia tentang pendidikan sains-agama di Indonesia pada rentang 2009 hingga 2018. Artikel diklasifikasikan ke dalam beberapa kategori yaitu: jenis artikel (pemikiran atau penelitian); jenis penelitian (lapangan atau pustaka); pendekatan (kualitatif atau kuantitatif); objek penelitian (tokoh, kurikulum, materi, metode, atau media); subjek penelitian (guru atau murid); penelitian tokoh (kontemporer atau klasik); pengembangan (materi sains yang diperkaya dengan teks agama atau materi agama yang diperkaya dengan sains); dan lembaga pendidikan (sekolah, madrasah, pesantren, atau perguruan tinggi). Data ditampilkan dengan membagi data menjadi dua dengan rentang lima tahunan (2009-2013 dan 2014-2018) serta diberi peringkat untuk melihat kenaikan atau penurunan peringkat perlima tahun. Artikel ini diharapkan dapat bermanfaat bagi para peneliti di bidang pendidikan sains dan agama untuk membaca arahan dan menentukan topik penelitian pada bidang tersebut. AbstractThis article shows the research trends in the field of religious-science education published by journals in Indonesia. Article searches are carried out through various scientific article indexers using several related keywords. The search found 103 journal articles from 72 journals in Indonesia on science-religion education in Indonesia between 2009 and 2018. Articles are classified into several categories, namely: types of articles (thoughts or research); type of research (field or literature); approach (qualitative or quantitative); research objects (figures, curriculum, materials, methods, or media); research subjects (teachers or students); character research (contemporary or classical); development (science material enriched with religious texts or religious material enriched with science); and educational institutions (schools, madrasahs, pesantren, or universities). The data is displayed by dividing the data into two with a five-year span (2009-2013 and 2014-2018) and ranked to see the increase or decrease in the five years’ rankings. It is hoped that this article will be of use by science and religion education researchers in reading directions and determining research topics in those fields

Wireless Network Channel Interference for Mobile Communication: a Systematic Literature Review and Research Agenda

The development and renewal of wireless technology is currently a necessity. Wifi technology has now reached wifi 6. Network infrastructure is currently the main thing in the process of distributing data using wireless media to mobile phone or laptop users. By looking at the need for wireless in offices, schools, public places, hospitals, and indoor or outdoor buildings that use a large number of access point devices. Based on a review of existing research obtained problems and opportunities for development, this literature study taken from 25 journal articles aims to be able to plan the construction of wireless network infrastructure so that channel interference does not occur. Research on wireless network channel interference has been carried out in several scenarios, for example, by increasing the number of wireless networks in adjacent areas, providing obstacles, and managing different channels. The eight most common methods used in wireless network channel interference research are descriptive analysis, comparative study, method analysis, model development, case studies, regression models, literature studies, and optimization. Research related to wireless network channel interference can still be further developed by using the latest wireless technology which can simultaneously test existing channel interferenc

Potential of 77,78 mW Red Diode Laser for Photodynamic

A laser is a light source that uses for any kinds of medical application. Diode Laser is one laser type using in the medical application such as Photodynamic Therapy and Photodynamic inactivation. Photodynamic Therapy is one of non-invasive therapy using for many therapies such as antimicrobial therapy, rejuvenating skin therapy, anti-aging skin therapy, etc. This therapy is using a light source with specific characteristics of wavelength in some case are using Light-sensitive molecules. This research aims to determine the potential of the diode laser for photodynamic therapy instrument. Diode Laser with wavelength value 660nm is Red Laser Diode that has main power output 79,4 mW. The application was using 1 cm clearance with the 30s of time exposure. The result showed that for Diode Laser (λ) 660nm using 7,8x10-2 W input power produce 77,78 mW output power; has operational temperature 53.56oC and light beam 4.2 mm

Rancang bangun rectifier antenna mikrostrip ufo pada frekuensi ultra wideband (uwb) sebagai pemanen energi elektromagnetik

Antena penyearah (rectifier antenna) adalah suatu antena yang diintegrasikan dengan sebuah rangkaian rectifier yang memiliki kemampuan untuk mengkonversi gelombang RF menjadi tegangan DC. Antena mikrostrip pada rectenna dapat berfungsi sebagai menangkap gelombang elektromagnetik kemudian diubah menjadi gelombang AC yang nantinya oleh rectifier akan didaur ulang lagi menjadi gelombang DC. Konsep daur ulang gelombang elektromagnetik ini dapat diaplikasikan pada frekuensi 1650 – 2700 MHz, yang kemudian frekuensi tersebut nantinya akan diubah untuk menghasilkan gelombang DC yang dapat diukur menjadi sebuah tegangan. Untuk membuat sebuah rectenna yang mampu bekerja pada frekuensi 1650 – 2700 MHz, maka perlu dirancang sebuah antena mikrostrip dan rangkaian rectifier yang mampu bekerja pada frekuensi tersebut. Perancangan dimensi antena mikrostrip diperoleh melalui perhitungan dan optimasi serta dilakukan simulasi, dan perancangan komponen rangkaian rectifier diperoleh melalui simulasi rangkaian. Fabrikasi antena mikrostrip ini menggunakan bahan Phenolic White Paper – FR4 dengan konstanta dielektrik (εr) = 3,9

5.5 Ghz Directional Antenna with 90 Degree Phase Difference Output

The wireless sensor network system requires two antennas that have an output 90 phase difference as a comparison and use a very expensive material for high frequency. 5.5 GHz microstrip antenna frequency equipped with two output 90 degree phase difference in one antenna has been proposed. This is a new technique in telecommunication systems to produce directional antenna use more precise and efficient phase comparators by using cheap and easy to find material at 5.5 GHz frequency. This system package consists of a circular patch, a reflector, a double transmission line with a via hole that has the same frequency in one antenna and quadrature 90 degree hybrid coupler integrated each other. This antenna produces a phase angle difference 87.752 degrees (5 degrees of standard tolerance) and gains 5.82 dBi at 5.5GHz frequency. Overall size of the proposed antenna design is 90 mm times 35 mm with Phenolic White Paper - FR4 with a dielectric constant is 4.4

Persepsi mahasiswa muslim mengenai hubungan sains dan agama di Universitas Ibn Khaldun Bogor

This article aims to map perceptions of the relationship between science and religion among students at Ibn Khaldun University, Bogor and to look at the demographic factors that influence these perceptions. This research is a quantitative study using a questionnaire. This study found that in the typology of pro-religious conflict, almost all students were at a high level. For harmonic typology, about two-thirds of students were at a high level, and the remaining third was at a moderate level. For the independent typology and pro-science conflict, the majority of students were at the moderate level. In an Islamic campus environment where respondents can be said to be uniform, there is no significant difference in perceptions based on the education taken, the origin of education, and gender.AbstrakArtikel ini bertujuan untuk memetakan persepsi hubungan antara sains dan agama pada mahasiswa di Universitas Ibn Khaldun Bogor serta melihat faktor-faktor demografis yang mempengaruhi persepsi tersebut. Penelitian ini merupakan penelitian kuantitatif dengan menggunakan kuesioner. Penelitian ini menemukan bahwa pada tipologi konflik pro-agama, hampir seluruh mahasiswa berada pada tingkat tinggi. Untuk tipologi harmonis, sekitar dua pertiga mahasiswa berada pada tingkat tinggi, sepertiga sisanya berada pada tingkat sedang. Untuk  tipologi independen dan konflik pro-sains, mayoritas mahasiswa berada pada tingkat sedang. Pada lingkungan kampus Islam di mana responden dapat dikatakan seragam, tidak ada perbedaan persepsi yang signifikan berdasarkan pendidikan yang ditempuh, asal pendidikan, serta jenis kelamin

Radio over Fiber Systems in Cellular Communications: A Systematic Literature Review and Research Agenda

A technology combining wireless communications and fiber optics to transmit radio frequency signals via fiber optic networks is called the Radio Over Fiber system. Capacity, range, reliability, and flexibility of the communication system are advantages offered by this method. Converting RF signals to optical signals using an optical modulation technique is a basic principle of the RoF system, in which they are then transmitted over fiber optic cables. Then, with the use of an optic detector and demodulation technique, that signal is restored to an RF signal at the receiving end. In RoF systems, the reduction of power loss and signal amplification is achieved through optical fiber, which allows transmission over long distances without loss of signal quality. Applications of the RoF system are cellular networks, satellite communications, and remote sensors. In cellular networks, the application of RoF such as expanding cellular network coverage, wireless backhaul, and increasing network capacity. In range expansion, RoF enables the transmission of RF signals from a base station to a remote receiving station via optical fiber, overcoming distance barriers and signal attenuation that occurs in traditional RF transmission. In wireless backhaul, RoF is used to connect base stations with the core network via optical fiber, providing higher capacity and reliability compared to traditional wireless backhaul. To increase network capacity, RoF can move its signal processing and amplifier toward the final users to enhance the data speeds and capacities of cellular networks. It is intended that readers will be able to learn more about Radio Over Fiber systems and their potential for improving the performance of a wireless radio network, as well as how this technology can increase its signal quality when it comes to mobile communications. With the continuous development of RoF technology, it is expected that there will be significant improvements to cellular communication services in the future