Vincenzo, Geordano (2019) Desain Link Radio Komunikasi Frekuensi Tinggi dengan Metode Near Vertical Incidence Skywave (NVIS). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Indonesia adalah negara kepulauan terbesar di dunia sehingga rawan dengan terjadinya bencana alam, termasuk gempa bumi. Untuk mengatasi permasalahan komunikasi pada keadaan darurat tersebut maka dibutuhkan sistem komunikasi yang dapat diandalkan. Sistem komunikasi frekuensi tinggi adalah komunikasi radio (High Frequency atau HF) dengan rentang frekuensi 3 – 30 MHz telah dikembangkan sejak tahun 1950 – 1960. Sistem komunikasi ini dapat merambat melalui propagasi skywave dengan memanfaatkan lapisan ionosfer. Dengan menggunakan gelombang HF, komunikasi dapat dilakukan hingga jarak ribuan kilometer. Gelombang HF dapat dipropagasikan dengan tiga model propagasi yaitu Groundwave, Skywave, dan NVIS. Propagasi NVIS memanfaatkan lapisan ionosfer dengan sudut elevasi sebesar 65o – 90o untuk memantulkan gelombang radio tersebut. Propagasi menggunakan propagasi ionosfer memiliki banyak gangguan. Kondisi ionosfer berubah – ubah sepanjang waktu sehingga memerlukan perhitungan untuk dapat memprediksi kondisi ionosfer. Desain link komunikasi dan perhitungan link budget diperlukan untuk mengetahui daya pancar yang diperlukan serta rugi – rugi yang ada pada jalur komunikasi yang dilewati oleh gelombang radio HF tersebut. Berdasarkan perhitungan, didapatkan daya terima sebesar 11 Watt dan simulasi yang dilakukan menggunakan perangkat lunak Proplab didapat propagasi NVIS dengan sudut elevasi sebesar 78.9o dengan frekuensi kerja pada 7 MHz dan penguatan sebesar 10.4 dB.
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Indonesia is the largest archipelagic country in the world that is prone to natural disasters, including earthquakes. To overcome communication problems in these emergencies, a reliable communication system is needed. The high frequency communication system is radio (High Frequency or HF) communication with a frequency range of 3 - 30 MHz which has been developed since 1950 - 1960. This communication system can propagate through skywave propagation by utilizing the ionosphere. By using HF waves, communication can be done up to a distance of thousands of kilometers. HF waves can be propagated with three propagation models namely Groundwave, Skywave, and NVIS. NVIS propagation utilizes the ionosphere with an elevation angle of 65o-90o to reflect the radio waves. Propagation using ionospheric propagation has a lot of interference. The ionosphere conditions change over time, so it requires calculations to be able to predict ionospheric conditions. The design of communication links and link budget calculations is needed to determine the transmit power needed and the losses that exist in the communication lines that are passed by the HF radio waves. Based on the calculation, the power received 11 Watt was obtained and the simulation carried out using Proplab software was obtained by NVIS propagation with an elevation angle of 78.9o with a working frequency of 7 MHz with 10.4 dB transmitter gain.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.384 151 Vin d-1 2019 |
| Uncontrolled Keywords: | komunikasi HF, link budget, simulasi, proplab |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.2 Wireless communication systems. Two way wireless communication |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Vincenzo Geordano |
| Date Deposited: | 08 May 2023 00:48 |
| Last Modified: | 08 May 2023 00:48 |
| URI: | http://repository.its.ac.id/id/eprint/63854 |
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