PERANCANGAN ANTENA VIVALDI ARRAY UNTUK APLIKASI GROUND PENETRATING RADAR ULTRA WIDEBAND (GPR-UWB)

ARDELINA, NANCY (2016) PERANCANGAN ANTENA VIVALDI ARRAY UNTUK APLIKASI GROUND PENETRATING RADAR ULTRA WIDEBAND (GPR-UWB). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu jenis antena yang sesuai untuk aplikasi Ground Penetrating Radar (GPR) adalah antena Vivaldi. Pada penelitian ini telah dirancang antena antipodal Vivaldi array empat elemen dengan konfigurasi H-Plane. Antena antipodal Vivaldi array terdiri dari empat antena antipodal Vivaldi elemen tunggal. Berdasarkan hasil simulasi, antena antipodal Vivaldi elemen tunggal bekerja pada rentang frekuensi 1.86 sampai 2.83 GHz, frekuensi tengah pada 2.377 GHz dengan nilai return loss sebesar -23.369 dB, bandwidth 0.97 GHz atau 40.81%, bandwidth fraksional sebesar 41.36%, dan gain 3.2 dBi. Untuk mengoptimalkan performansi antena array, maka perlu ditentukan jarak antarelemen dengan efek mutual coupling terkecil. Berdasarkan hasil simulasi, jarak antarelemen sebesar 10d/8 atau 6.6875 cm yang paling sesuai dengan kriteria desain. Berdasarkan hasil simulasi, antena antipodal Vivaldi array empat elemen dengan jarak antarelemen sebsesar 10d/8 bekerja pada rentang frekuensi 1.7326 sampai 2.9103 GHz, frekuensi tengah pada 2.473 GHz dengan return loss sebesar -33.142 dB, bandwidth 1.1867 GHz atau 47.62%, bandwidth fraksional 50.73%, dan gain 10.9 dBi. Sedangkan berdasarkan hasil pengukuran antena elemen tunggal bekerja pada frekuensi 2.04 sampai 2.37 GHz, frekuensi tengah pada 2.22 GHz dengan return loss sebesar -34.1526 dB dan VSWR 1.0399, bandwidth sebesar 0.33 GHz, bandwidth fraksional 53%, dan gain 14.7 dBi. Berdasarkan hasil pengukuran antena antipodal Vivaldi array empat elemen bekerja pada rentang frekuensi 1.98 sampai 2.77 GHz, frekuensi tengah 2.46 GHz dengan return loss -38.8579 dB dan VSWR 1.023, bandwidth 0.79 GHz atau 32.11%, bandwidth fraksional 33.26%, dan gain 16 dBi. Antena hasil fabrikasi telah memuhi kriteria desain, namun terdapat perbedaan hasil pada beberapa parameter yang dapat disebabkan oleh ketepatan dimensi antena hasil pengukuran dan penyolderan konektor ke antena. ============================================================ One of the most suitable antennas for Ground Penetrating Radar (GPR) application is Vivaldi antenna. In this research, four elements Antipodal Vivaldi Array Antenna has been proposed. This antenna consist of four element antipodal Vivaldi single antenna. Based on the simulation result, the single element antenna works well at 1.86-2.83 GHz, centre frequency of 2.377 GHz, return loss of - 23.369 dB, 0.97 GHz or 40.81% bandwidth, 41.36% factional bandwidth, dan 3.2 dBi of gain. In order to optimize the antenna array’s performance, distance between elements with minimum mutual coupling is required. Distance between elements at 10d/8 or 6.6875 are the most suitable for design criteria. Based on simulation result, the four elements antenna works well at 1.7326-2.9103 GHz, centre frequency of 2.473 GHz, return loss of -33.142 dB, 1.1867 GHz or 47.62% bandwidth, 50.73% fractional bandwidth, and 10.9 dBi gain. Based on the measurement result, the single element antenna works well at 2.04-2.37 GHz, 2.22 GHz centre frequency, -34.1526 dB return loss, 1.0399 of VSWR, 0.33 GHz or 1.486% bandwidth, 53% fractional bandwidth, and gain of 14.7 dBi. The four elements of antipodal Vivaldi array antenna works well at 1.98-2.77 GHz, 2.46 GHz centre frequency, -38.8579 dB return loss, 1.023 VSWR, 0.79 GHz or 32.11% bandwidth, 33.26% fractional bandwidth, and gain of 16 dBi. The fabricated antenna has meet the design criteria, however there are differences in several parameters that can be caused by the accuracy of the antenna’s dimension and soldering process the connector to the antenna .

Item Type: Thesis (Masters)
Additional Information: RTE 621.382 54 Ard p
Uncontrolled Keywords: Antena Vivaldi, Antena Vivaldi Array, GPR-UWB
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.6 Antennas (Electronics)
Divisions: Faculty of Industrial Technology > Electrical Engineering > (S2) Master Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 03 Jan 2017 05:11
Last Modified: 26 Dec 2018 03:21
URI: http://repository.its.ac.id/id/eprint/1270

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