Gregorius Pascal Foster Sianturi, - and Agus Heri Setya Budi, - and Nurul Fahmi Arief Hakim, - (2025) METALENS ANTENA 24 GHZ UNTUK BEAM STEERING PASIF. S1 thesis, Universitas Pendidikan Indonesia.
Abstract
Antena pada sistem radar dan komunikasi frekuensi tinggi seperti 24 GHz rentan terhadap interferensi dan distorsi akibat objek sekitar maupun pantulan gelombang, yang dapat menurunkan kinerja pada aplikasi berakurasi tinggi seperti radar otomotif, penginderaan jarak jauh, dan komunikasi IoT. Solusi yang ditawarkan adalah metalens berbasis metasurface untuk beam steering pasif tanpa sistem aktif yang kompleks. Penelitian ini mencakup desain unit sel dengan kontrol fase transmisi berbasis distribusi hiperbolik, fabrikasi pada substrat berpermittivitas rendah, serta pengujian eksperimental. Unit sel mampu menghasilkan pergeseran fase hampir 360° dengan kesalahan ±20°, sehingga mendukung distribusi fase kontinu. Hasil pengujian menunjukkan metalens membentuk fokus dengan efisiensi 31–68% pada 22–24 GHz. Distribusi fokus terukur konsisten dengan simulasi, meski ada pergeseran frekuensi puncak akibat toleransi fabrikasi dan konfigurasi pengukuran. Dengan struktur ringkas, ringan, dan bebas komponen aktif, metalens ini efektif mempersempit pola radiasi antena sekaligus berpotensi mudah diintegrasikan ke sistem radar dan komunikasi generasi berikutnya. Antennas in radar and high-frequency communication systems such as 24 GHz are prone to interference and distortion from surrounding objects and wave reflections, which can degrade performance in high-accuracy applications such as automotive radar, remote sensing, and IoT communication. A proposed solution is a metasurface-based metalens for passive beam steering without complex active systems. This research involves unit cell design with transmission phase control based on a hyperbolic phase distribution, fabrication on a low-permittivity substrate, and experimental validation. The developed unit cell achieves nearly 360° phase shift with ±20° error, supporting a continuous phase distribution. Measurements show that the metalens forms a focus with efficiency of 31–68% across 22–24 GHz. The measured focal field distribution is consistent with simulations, although a slight peak frequency shift occurs due to fabrication tolerances and measurement setup. With a compact and lightweight structure free of active components, this metalens effectively narrows the antenna radiation pattern and offers strong potential for seamless integration into next-generation radar and communication systems.
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| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | https://scholar.google.com/citations?view_op=list_works&hl=en&user=cLMaVkYAAAAJ ID SINTA Dosen Pembimbing: Agus Heri Setya Budi: 6003446 Nurul Fahmi Arief Hakim: 6725597 |
| Uncontrolled Keywords: | metalens, metasurface, beam steering pasif, hiperbolik, fokus kontrol metalens, metasurface, passive beam steering, hyperbolic, focusing |
| Subjects: | L Education > L Education (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Fakultas Pendidikan Teknik dan Industri > Jurusan Pendidikan Teknik Elektro |
| Depositing User: | Gregorius Pascal Foster Sianturi |
| Date Deposited: | 29 Oct 2025 00:55 |
| Last Modified: | 29 Oct 2025 00:55 |
| URI: | http://repository.upi.edu/id/eprint/144139 |
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