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Rizadi Sasmita Darwis
Politeknik Caltex Riau
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Journal : Proceeding Applied Business and Engineering Conference

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Desain Antena Yagi LTE Ninda Febtaria; Rizadi Sasmita Darwis
ABEC Indonesia Vol. 9 (2021): 9th Applied Business and Engineering Conference
Publisher : Politeknik Caltex Riau

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Abstract

In rural areas, an antenna is needed so that the LTE network can reach farther areas, making it easier for people to get information from the internet. Yagi antenna is the right antenna because it has a directional radiation pattern so that the direction of the beam is directional and effective for reaching long distances. In this research, the yagi antenna is designed and made to operate at 450 MHz LTE frequency. The design of this LTE yagi antenna uses a microstrip antenna as its driven element with FR4 substrate type and a relative permittivity value of 4.6. The material used for the reflector and director elements is aluminum with an outer diameter of 8 mm and an inner diameter of 7 mm. The LTE yagi antenna is designed to have 10 elements consisting of 1 reflector element, 1 driven element and 8 director elements. The parameters obtained from the simulation results of the Yagi LTE antenna have reached the target. The return loss at 450 MHz is -32.26 dB with VSWR 1.05 and gain 9.999 dBi. The radiation pattern of the simulated antenna horizontally and vertically are directional. The simulated antenna bandwidth has met the uplink and downlink frequencies. Keywords: Yagi Antenna, LTE, Microstrip Antenna.
PERANCANGAN DAN PEMBUATAN HARDWARE DIGITAL SIGNAGE MENGGUNAKAN LED P4 RGB BERBASIS RASPBERRY PI Muharram Apri Linorfah; Rizadi Sasmita Darwis; Hamid Azwar
ABEC Indonesia Vol. 9 (2021): 9th Applied Business and Engineering Conference
Publisher : Politeknik Caltex Riau

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Abstract

In the digital era, information boards have migrated from conventional forms to digital forms, hence the term digital signage. Digital signage is a digital device that has been programmed to display information through a monitor board, LCD TV, PLASMA TV, projectors, and digital billboards. Currently, it is very common for us to pay attention to an information board in offices, in lecture buildings, at airports, and train stations in the form of a flat screen monitor controlled by a computer. Among them, the media can only be placed in one place and it is relatively difficult to move. Therefore, the use of computers will be replaced by using raspberry pi as the operating medium. This research includes raspberry pi, RGB LED as a screen to display information and the web to change data or information displayed on the RGB LED screen. Based on the research conducted, it was found that data in the form of images or videos can be displayed on the RGB LED screen using the web.
Rancang Bangun Antena Vivaldi Frekuensi 478-694 MHz Untuk TV Digital Wangi Zarmen; Rizadi Sasmita Darwis
ABEC Indonesia Vol. 9 (2021): 9th Applied Business and Engineering Conference
Publisher : Politeknik Caltex Riau

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Abstract

Nowadays, television is having a massive development, to fulfill the needs of the technology evolution which started from analog TV, it has advanced into digital TV. In this research, vivaldi antennathat was designed can work on digital TV frequency, that is at 478-694 MHz. Vivaldi antenna has several advantages, such as; simple structure, light weight, and most importanly ultra-wideband, so this antenna becomes a favorite tool in communication systems.The substrate of vivaldi antenna in this research is designed for using FR-4 with a dielectric permitivity is 4.6 mm. This antenna is designed with a type of antipodal vivaldi antenna by adding a triangular dielectric director to add the gain of antenna. The antenna is the simulated by using software simulator before being manufactured and measured. The mesuarement obtained vivaldi antenna that have been made to have a return loss of -18.86 and VSWR of 1.29 in the frequency range of 538.8-751.4 MHz, a gain of dBi, and unidirectional radiation patterns. With these characteristic results the antenna can work well at a frequency of 538.8-751.4 MHz.
Co-Authors Cyntia Widiasari Hamid Azwar M. Suhairi Mohammad Yanuar Hariyawan Muharram Apri Linorfah Ninda Febtaria Wangi Zarmen Widi Kurniawan Wiwin Styorini