Setyawan, Andri (2025) ANTENA HALF-MODE SUBSTRATE INTEGRATED WAVEGUIDE DENGAN SLOT CINCIN SETENGAH OKTAGONAL PADA FREKUENSI S-BAND DAN C-BAND UNTUK PENINGKATAN BANDWIDTH. S2 thesis, Universitas Mercu Buana Jakarta - Menteng.
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Abstract
Penelitian ini bertujuan untuk mengatasi keterbatasan bandwidth pada antena miniatur berbasis Substrate Integrated Waveguide (SIW), khususnya dalam aplikasi komunikasi irkabel modern yang beroperasi pada rentang frekuensi S-band dan C- band. Pendekatan konvensional sering kali menghadapi kendala dalam mempertahankan ukuran kompak tanpa mengorbankan performa, termasuk gain dan efisiensi radiasi. Dikembangkan dua varian antena Half-Mode SIW (HMSIW) yang mengintegrasikan slot cincin setengah oktagonal ke dalam rongga HMSIW. Pada antena S-band, konfigurasi ini menghasilkan dua mode resonansi, yaitu TE101 dan TE102. Sementara itu, pada antena C-band, digunakan topologi slot yang sama untuk mengeksplorasi kinerja pada rentang frekuensi lebih tinggi. Perancangan dan pengujian dilakukan secara numerik dan eksperimental untuk mengukur bandwidth, gain, dan karakteristik radiasi. Desain antena S-band menunjukkan bandwidth fraksional terukur sebesar 5,6% (3,15–3,33 GHz) dan simulasi sebesar 5,2% (3,17– 3,40 GHz), sedangkan antena C-band menunjukkan bandwidth simulasi sebesar 18% (5,60–6,71 GHz) dan terukur sebesar 19,4% (5,82–7,07 GHz), dengan nilai S11 selalu di bawah −10 dB. Kedua antena mengalami reduksi ukuran sebesar 50% dibandingkan dengan antena SIW full-mode dan mempertahankan gain serta pola radiasi linear yang stabil—bersifat directional pada S-band dan bidirectional pada C-band. This study aims to address the bandwidth limitations of miniaturized antennas based on Substrate Integrated Waveguide (SIW), particularly for modern wireless communication applications operating in the S-band and C-band frequency ranges. Conventional approaches often face challenges in maintaining compact size without compromising performance, including gain and radiation efficiency. Two variants of Half-Mode SIW (HMSIW) antennas were developed by integrating a half- octagonal ring slot into the HMSIW cavity. In the S-band antenna, this configuration produces two resonance modes, namely TE101 and TE102. Meanwhile, for the C-band antenna, the same slot topology was employed to explore performance at higher frequency ranges. The design and testing were conducted both numerically and experimentally to evaluate bandwidth, gain, and radiation characteristics. The S-band antenna design demonstrated a measured fractional bandwidth of 5.6% (3.15–3.33 GHz) and a simulated bandwidth of 5.2% (3.17– 3.40 GHz), whereas the C-band antenna exhibited a simulated bandwidth of 18% (5.60–6.71 GHz) and a measured bandwidth of 19.4% (5.82–7.07 GHz), with S11 consistently below −10 dB. Both antennas achieved a 50% size reduction compared to full-mode SIW antennas while maintaining stable linear radiation patterns— directional in the S-band and bidirectional in the C-band.
| Item Type: | Thesis (S2) |
|---|---|
| NIM/NIDN Creators: | 55423110002 |
| Uncontrolled Keywords: | HMSIW antenna, S-band, C-band, bandwidth enhancement, half octagonal ring slots, miniaturization |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan |
| Divisions: | Pascasarjana > Magister Teknik Elektro |
| Depositing User: | YOSUA EBENEZER PARDEDE |
| Date Deposited: | 16 Jul 2025 04:21 |
| Last Modified: | 16 Jul 2025 04:21 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/96084 |
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