Barus, Muhammad Fachrezi (2026) Perancangan Dan Karakterisasi Antena Mikrostrip Ultra-Wideband Sebagai Antena Standar untuk Chamber Pengujian Elektromagnetik. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan antena standar berbiaya rendah yang mampu bekerja pada rentang frekuensi sangat lebar semakin meningkat seiring berkembangnya pengujian elektromagnetik di laboratorium. Penelitian ini bertujuan merancang dan mengarakterisasi antena mikrostrip ultra-wideband sebagai antena standar untuk chamber pengujian elektromagnetik pada rentang 0,8 hingga 18 GHz. Perancangan didasarkan pada teori antena mikrostrip dan konsep ultra-wideband dengan mengadopsi geometri patch elips yang dioptimalkan melalui penambahan ring slot, tapered feedline, dan curve partial ground untuk meningkatkan pencocokan impedansi dan memperlebar bandwidth. Antena dimodelkan menggunakan perangkat lunak berbasis metode Finite-Difference Time-Domain (FDTD), kemudian difabrikasi pada substrat FR-4 dan divalidasi melalui pengukuran parameter S11, VSWR, serta pola radiasi di anechoic chamber. Hasil pengukuran menunjukkan antena beroperasi pada rentang 0,697 hingga 18 GHz dengan nilai S11 di bawah −10 dB serta memperlihatkan kesesuaian pola radiasi yang baik terhadap hasil simulasi meskipun terdapat perbedaan akibat toleransi fabrikasi dan pengukuran. Temuan ini menunjukkan bahwa antena yang dikembangkan layak digunakan sebagai kandidat antena standar yang kompak, ekonomis, dan andal untuk mendukung berbagai pengujian elektromagnetik laboratorium.
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The increasing demand for low-cost standard antennas capable of operating over an extremely wide frequency range has become an important consideration in electromagnetic testing applications. This study aims to design and characterize an ultra-wideband (UWB) microstrip antenna as a standard antenna for electromagnetic chamber measurements covering the frequency range of 0.8–18 GHz. The design is based on microstrip antenna theory and ultra-wideband principles by employing an elliptical patch geometry enhanced with a ring slot, tapered feedline, and curved partial ground to improve impedance matching and bandwidth performance. The antenna was modeled using software based on the Finite-Difference Time-Domain (FDTD) method, fabricated on an FR-4 substrate, and experimentally validated through S11, VSWR, and radiation pattern measurements in an anechoic chamber. Measurement results indicate that the proposed antenna operates from 0.697 to 18 GHz, achieving S11 below −10 dB and VSWR below 2 across the target frequency range. The measured radiation patterns also show good agreement with simulation results despite minor deviations caused by fabrication tolerances and measurement uncertainties. These findings demonstrate that the proposed antenna is a compact, cost-effective, and reliable candidate for use as a standard antenna in electromagnetic testing applications.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | antena mikrostrip, ultra-wideband, patch elips, pengujian elektromagnetik, ruang anechoic, microstrip antenna, ultra-wideband, elliptical patch, electromagnetic testing, anechoic chamber |
| Subjects: | Q Science > QC Physics > QC665.E38 Electric fields. |
| Divisions: | Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Fachrezi Barus |
| Date Deposited: | 28 Jul 2026 08:30 |
| Last Modified: | 28 Jul 2026 08:30 |
| URI: | http://repository.its.ac.id/id/eprint/138931 |
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