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All Journal Jurnal Teknik ITS Journal of Science and Applicative Technology Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Jurnal Teknik Elektro
Rheyuniarto Sahlendar Asthan
Institut Teknologi Sumatera
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Desain dan Implementasi Modulator GMSK 19200 Baud untuk Pengiriman Citra pada Payload Satelit Nano Rheyuniarto Sahlendar Asthan; Suwadi Suwadi; Gamantyo Hendrantoro
Jurnal Teknik ITS Vol 2, No 1 (2013)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1160.108 KB) | DOI: 10.12962/j23373539.v2i1.2318

Abstract

Satelit nano merupakan satelit mahasiswa pertama yang sedang dikembangkan di beberapa perguruan tinggi di Indonesia, salah satunya adalah Institut Teknologi Sepuluh Nopember (ITS). Salah satu fungsi satelit tersebut adalah melakukan pengiriman citra pada lintasan downlink 2,4 GHz. Tugas Akhir ini dititikberatkan pada pembuatan modulator GMSK sebagai salah satu modul penyusun pada payload satelit. Tugas akhir ini bertujuan merancang dan mengimplementasikan perangkat modulator GMSK 19200 baud untuk pengiriman citra pada dari satelit ke stasiun bumi penerima. Modulator GMSK dirancang melalui 2 tahapan, yaitu perancangan dan pembuatan filter Gaussian menggunakan CMX589A serta perancangan dan pembuatan modulator FM menggunakan NE568A dan NE5539. Filter Gaussian yang dirancang berukuran 4×4 cm sedangkan modulator FM berukuran 6,5×2,5 cm. Hasil pengujian dan pengukuran perangkat menunjukan bahwa modulator GMSK mampu bekerja dengan kecepatan transmisi data sebesar 19200 baud. Besarnya baudrate yang dihasilkan telah memenuhi spesisikasi yang dibutuhkan. Frekuensi keluaran modulator GMSK adalah frekuensi 11,71 MHz dengan power spectral -4 dBm. Dari segi ukuran dan konsumsi daya yang rendah, perangkat tersebut dapat ditempatkan pada payload satelit nano
Antena Ring Sirkular dengan Kemampuan Penekanan Higher Order Mode Rheyuniarto Sahlendar Asthan; Achmad Munir
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 8 No 4: November 2019
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1119.533 KB)

Abstract

This paper presents the development of a circular ring-shaped antenna with ability to suppress higher order mode. An S-shaped is added into the ring in order to satisfy the goal of the antenna development. The upper and lower edges of the ring are excited differentially using two ports in order to have symmetrical radiation pattern. Each port is directly connected to a 50 Ω SMA connector using microstrip feeding line. The antenna is designed with an FR4 dielectric substrate with the dimension of 85.4 mm × 85.4 mm and intended to work at the center frequency of 0.9 GHz. The proposed antenna is compared with the conventional circular ring-shaped antenna to observe the antenna performances in term of higher order mode suppression. In addition, optimization is carried out by varying physical antenna parameters. The measurement result shows that circular ring-shaped antenna with S-shaped element can suppress the higher order mode frequency of 19.55 dB and work properly at the desired frequency of 0.9 GHz. The measured impedance bandwidth for the reflection coefficient (S11) below −10 dB is 251 MHz with fractional bandwidth (fBW) of 27.89%. The symmetrical radiation pattern in E-plane with maximum power density at the boresight is obtained at the frequency of 0.9 GHz and 1.94 GHz. The measured 3 dB beamwidths of 0.9 GHz and 1.94 GHz in E-plane are 99.4o and 100.5o, respectively.
Perancangan dan Simulasi Antena Mikrostrip MIMO 4×4 Rectangular Patch dengan Double U-Slot dan DGS pada Frekuensi 26 GHz untuk Aplikasi 5G Mohammad Anthoni; Rheyuniarto Sahlendar Asthan; Anita Pascawati; Dick Maryopi; Muhammad Reza Kahar Aziz
Journal of Science and Applicative Technology Vol 5 No 2 (2021): Journal of Science and Applicative Technology December Chapter
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM), Institut Teknologi Sumatera, Lampung Selatan, Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35472/jsat.v5i2.336

Abstract

Abstract: This paper proposes a microstrip antenna for fifth Generation (5G) technology with a carrier frequency of 26 GHz. Furthermore, the antenna is designed with double U-slots added to a rectangular patch using Defected Ground Structure (DGS) to increase the bandwidth and reduce mutual coupling. It is expected that the antenna has a directional radiation pattern and a linear polarization. For the feeding of the patch, the proximity coupled feed line method is used. The proximity coupled feed line is placed on a different substrate layer with the radiating element. The advantage of this feeding method is that it can increase the impedance bandwidth. The substrate material used is RT Duroid 5880, which is chosen because it can produce more oversized dimensions, work at high frequencies, and have a small material permittivity. The simulation results showed that the highest impedance bandwidth value is 1.6564 GHz, the mutual coupling value has a limit below -20 dB, and the gain value is 7,1151 GHz. Keywords: MilimeterWave, MIMO, double U-Slot, Defected Ground Structure, 5G Abstrak: Artikel ini mengusulkan antena mikrostrip untuk teknologi generasi ke-5 (5G) dengan frekuensi carrier 26 GHz. Antena dirancang dengan tambahan double U-slot pada bagian patch-nya serta menggunakan metode Defected Ground Structure (DGS) untuk meningkatkan bandwidth dan mengurangi efek mutual coupling. Antena yang dirancang memiliki pola radiasi directional dan berpolarisasi secara linier. Untuk catuan ke patch, digunakan metode proximity coupled. Pencatu proximity di tempatkan pada lapisan substrat yang berbeda dengan elemen peradiasi. Kelebihan dari metode pencatuan ini adalah dapat meningkatkan bandwidth impedansi. Bahan substrat yang digunakan adalah RT Duroid 5880, bahan ini dipilih karena mampu digunakan untuk menghasilkan bentuk dimensi yang lebih besar dan dapat bekerja di frekuensi tinggi serta memiliki permitivitas bahan yang kecil. Hasil simulasi menunjukkan bahwa 1) nilai bandwidth impedansi tertinggi sebesar 1,6564 GHz, 2) nilai mutual coupling memiliki batas di bawah -20 dB, dan 3) nilai gain sebesar 7,1151 dB. Kata Kunci: milimeterWave, MIMO, double U-Slot, Defected Ground Structure, 5G
Characterization of Microstrip Antenna with H-slot for X Band Synthetic Aperture Radar Application Vahaldyo Arbandy; Rheyuniarto Sahlendar Asthan
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 8 No 2 (2021): Jurnal Ecotipe, Oktober 2021
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v8i2.2355

Abstract

Perancangan Antena Yagi Cetak untuk Sensor Deteksi Petir pada Pita Very High Frequency Mia Maria Ulfah; Dean Corio; Rheyuniarto Sahlendar Asthan; Achmad Munir
Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) Vol 9 No 1 (2022): Jurnal Ecotipe, April 2022
Publisher : Jurusan Teknik Elektro, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jurnalecotipe.v9i1.2886

Abstract

Antena Yagi konvensional dan antena Yagi cetak sebagai komponen penyusun sensor deteksi petir telah dirancang dan disimulasikan pada penelitian ini. Kedua antena memiliki jumlah elemen yang sama dan dicatu dengan menggunakan coaxial probe. Antena Yagi cetak menggunakan medium berupa bahan substrat dielektrik dengan nilai permitivitas relatif tertentu sedangkan antena yagi konvensional menggunakan medium udara. Dimensi akhir rancangan antena Yagi adalah sebesar 0,84? x 0,5?, sementara antena Yagi cetak 0,595? x 0,47?. Hasil simulasi menunjukkan bahwa dengan ukuran yang lebih kecil, ringan, dan planar, antena Yagi cetak mampu bekerja pada frekuensi yang sama dengan koefisien refleksi sebesar -17,1dB, gain puncak 8,8dBi, dan memiliki pola radiasi directional pada pita VHF.
Wideband Multi-Resonant Microstrip Patch Antenna for Wireless Communication Systems Mia Maria Ulfah; Rheyuniarto Sahlendar Asthan
Jurnal Teknik Elektro Vol. 17 No. 2 (2025)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v17i2.35545

Abstract

The increasing demand for high-performance wireless communication systems has driven the development of compact antennas that can support wideband operation, particularly in the 5 GHz frequency range. Microstrip patch antennas (MPAs) remain attractive for such applications due to their low profile and ease of integration, although achieving a wide impedance bandwidth remains a key challenge. This paper presents a low-profile MPA with a wideband response designed for the 5 GHz band of wireless communication systems. The proposed MPA is implemented on a single-layer FR-4 substrate with a thickness of 1.6 mm and is excited using a coaxial probe feed. To achieve a wide impedance bandwidth, a U-shaped patch is utilized as the primary radiator, complemented by a slot, a parasitic element, and a rectangular ring surrounding the main resonator, aiming to generate multiple resonant modes and improve impedance matching. The influence of each modification on antenna performance is systematically analyzed. To validate its performance, the proposed MPA is fabricated and measured, with the obtained results compared to the simulated ones. Simulation and measurement results show good agreement, confirming that the proposed MPA achieves a wideband response with a fractional bandwidth of 18.8% and a peak realized gain of 4.85 dBi. These results highlight the effectiveness of the proposed design and demonstrate its potential for compact and wideband wireless communication devices operating around 5 GHz frequency range.
Bandwidth Enhancement of Proximity-Coupled Patch Antenna Using Dual Open-Ended Ring-Shaped Slots for Sub-6 GHz Applications Rheyuniarto Sahlendar Asthan; Mia Maria Ulfah
Jurnal Teknik Elektro Vol. 18 No. 1 (2026)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v18i1.47475

Abstract

This paper presents a bandwidth enhancement of patch antenna intended for sub-6 GHz applications. A square-shaped radiating patch is configured on a double-layer FR-4 dielectric substrates with a dielectric constant of 4.3 and a total thickness of 3.2 mm. To improve the impedance bandwidth, the antenna is fed using proximity-coupling method, in which the microstrip feeding line and the ground plane are placed on the top and bottom layers of the second substrate. Dual open-ended ring-shaped slots are subsequently introduced and etched on the radiating patch element to further enhance the antenna bandwidth. Various slot structures are evaluated, and their physical parameters are varied in a parametric study to analyze their effect on antenna performance, particularly impedance bandwidth. The proposed antenna has a compact dimension of 0.38λ0×0.38λ0×0.06λ0 and exhibits wideband characteristics with a fractional bandwidth of 22.3%.
Co-Authors Achmad Munir Achmad Munir Anita Pascawati Corio, Dean Dick Maryopi Gamantyo Hendrantoro Mia Maria Ulfah Mia Maria Ulfah Mohammad Anthoni Muhammad Reza Kahar Aziz Suwadi Suwadi Vahaldyo Arbandy