Pelebaran Bandwidth Antena Mikrostrip Dengan Struktur Pentanahan Tiruan

Permatasari, Prima Dian (2015) Pelebaran Bandwidth Antena Mikrostrip Dengan Struktur Pentanahan Tiruan. Undergraduate thesis, Institut Technology Sepuluh Nopember.

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Abstract

Antena mikrostrip banyak digunakan dalam aplikasi sistem telekomunikasi. Antena mikrostrip mempunyai kelebihan yaitu dimensi yang kecil, harga yang murah dan mudahnya fabrikasi. Akan tetapi antena ini memiliki kekurangan seperti bandwidth yang sempit, gain yang kecil, dan efisiensinya yang rendah. Masalah paling serius yang dihadapi oleh antena mikrostrip adalah sempitnya bandwidth yang dihasilkan. Pada Tugas Akhir akan dibahas peningkatan lebar bandwidth antena mikrostrip menggunakan metode Artificial Ground Structure (AGS) yang bertindak sebagai ground plane antena. Metode AGS ini mengunakan rectangular unit cell yang bertindak sebagai reflector antena. Antena terlebih dahulu disimulasikan di software CST Microwave Studio 2010 sampai sesuai dengan spesifikasi yang diinginkan kemudian difabrikasi. Setelah difabrikasi maka akan dilakukan pengukuran. Saat simulasi, antena tanpa AGS menghasilkan bandwidth sebesar 267 MHz untuk rentang frekuensi 6-6.3 GHz, untuk level pembacaan VSWR <2, return loss pada fc sebesar -28.754 dB. Sedangkan antena dengan AGS menghasilkan bandwidth 2052 MHz untuk rentang frekuensi 5.759 -7.811 GHz, return loss pada fc sebesar -28.420 dB. Saat pengukuran, antena tanpa AGS mempunyai bandwidth sebesar 180 MHz MHz untuk rentang frekuensi 6.640 – 6.6 GHz, return loss pada fc sebesar -15.043 dB. Sedangkan antena dengan AGS menghasilkan bandwidth 811 MHz untuk rentang frekuensi 5.883 GHz – 6.694 GHz, return loss pada fc sebesar -21.233 dB. Dengan metode AGS peningkatan bandwidth antena sebesar 77.805% ================================================================================================ Microstrip antennas have been widely used in many system telecommunication. It can be found in radar system, satellite communication, or in GPS. Microstrip antennas have several advantages such as their small dimension, low cost and ease of fabrication. But they have their disadvantages too, such as narrow bandwidth, small gain and low efficiency. But the most serious problem is how small bandwidth they produced. So, many researches are done to make microstrip antennas have wide bandwidth. In this final project will be explained about how to increase bandwidth with a method called Artificial Ground Structure (AGS) as antenna ground plane. This method is used rectangular unit cell as reflector. Two kinds of antennas will be made, antennas without AGS and with one, and the bandwidth they produced will be compared. Before fabrication, antennas will be simulated in software CST Microwave Studio 2010 until they find the satisfactory result, and then fabricated it. In simulation, antennas without AGS have 267 MHz bandwidth in range frequency 6-6.3 GHz, in VSWR level < 2, return loss in fc is -28.754 dB. Whereas antenna with AGS, it can produce bandwidth 2052 MHz for range frequency 5.759 -7.811 GHz, return loss in fc is -28.420 dB. In the measurement, antennas without AGS have bandwidth 180 MHx for range frequency 6.64-6.6 GHz, return loss in fc is - 15.043 dB. And antennas with AGS can produce bandwidth 811 MHz for range frequency 5.883 GHz – 6.694 GHz, return loss in fc is -21.233 dB. So, with AGS method, bandwidth antennas can be improved until 77.805%.

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.382 4 Per p
Uncontrolled Keywords: antena mikrostrip, AGS, peningkatan bandwidth, rectangular unit cell
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.6 Antennas (Electronics)
Divisions: Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 15 Aug 2018 02:39
Last Modified: 15 Aug 2018 02:39
URI: http://repository.its.ac.id/id/eprint/59360

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