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Sukahir
Politeknik Penerbangan Palembang
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ANALISA PENINGKATAN GAIN ANTENNA MENGGUNAKAN ARRAY FEEDING PADA FREKUENSI X BAND Bambang Bagus; Sukahir; Ayub Wimatra; Fatmawati Sabur
Jurnal Penelitian 28-41
Publisher : Politeknik Penerbangan Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46491/jp.v8i1.1356

Abstract

Microstrip antennas are antennas that are often applied because of their simple structure and easy to apply. The purpose of the experiment was to design and analyze the results of microstrip antennas in CST applications with a frequency of 10.5 GHz. Experiments used single patch antennas, 1 x 2 arrays using 2 patches and 1 x 4 antenna arrays using 4 antenna patches. Each series has different characteristics of return loss, gain, VSWR, and axial ratio. Based on these experiments, the results were obtained, namely the return loss of single patch, array 1x2 and array 1 x 4 respectively were -19 dB, -11 dB and -19 dB, while antenna gain was 2.9 times, 9.09 times and 2.27 times. The lowest VSWR value is found in the single patch circuit while the highest is found in the 1 x 4 array antenna. The axial ratio of a single patch and an array of 1 x 4 has the same value of 40, while a series of arrays of 1 x 2 has an axial ratio value of 35. Based on these results, it can be concluded that each circuit has a specification of values that are not the same, but it is still included in the appropriate antenna criteria, namely VSWR <2 and return loss below -10 dB.
Analisa Perancangan Dinding Penahan Tanah terhadap Stabilitas dan Daya Dukung Tanah Bandara Virma Septiani; Sukahir; Viktor Suryan; Afra Nabilah Andeni
Ranah Research : Journal of Multidisciplinary Research and Development Vol. 6 No. 4 (2024): Ranah Research : Journal Of Multidisciplinary Research and Development (Mei 202
Publisher : Dinasti Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/rrj.v6i4.912

Abstract

A retaining wall design is a construction design that functions to retain loose or natural soil and prevent the collapse of sloping land or slopes whose stability cannot be guaranteed by the slope of the land itself. The retained soil provides an active push on the wall structure so that the structure is less likely to topple or shift. Initially, retaining walls were made due to the increasing use of retaining construction which was used as a place to store or store materials in granular form. A mockup is an imitation of an object in a shape that is exactly the same as the original shape with a size that is smaller than the actual size. Mockups are usually made on a smaller scale than the original object and aim to help visualize, understand and test concepts. The aim of this research is to analyze the design of retaining walls where the design of retaining walls functions to retain loose or natural soil and prevent the collapse of sloping soil whose stability cannot be guaranteed by the slope of the soil itself. Based on the results of the design analysis of the design of the retaining wall, the results of the design calculation analysis of the active load were 90.07 tons and the passive load was 126.38 tons. The results of the passive load calculation were greater than the active load so that it was considered effective and relatively safe for supporting the surface of the land. landslides supported by walls. The results of the mock-up design can be assumed to be of a suitable size and calculation to be used for realization in accordance with the designation of the retaining wall.
Co-Authors Afra Nabilah Andeni Ayub Wimatra Bambang Bagus Harianto Fatmawati Sabur Viktor Suryan Virma Septiani