Rahayu, Dita Novali Putri (2016) Perhitungan Delay Propagasi Berdasarkan Data Total Electron Content (TEC) Sebagai Verifikasi Hasil Pengukuran Sistem Komunikasi High Frequency (HF) di Daerah Ekuator. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem komunikasi radio High Frequency (HF) memiliki
kelebihan yakni dapat memberikan transmisi jarak jauh, biaya relatif
murah serta fleksibel. Sistem komunikasi HF menggunakan ionosfer
sebagai media transmisi gelombang. Sinyal dari antena akan
berpropagasi di media ionosfer dan kemudian akan dipantulkan menuju
ke penerima. Media ionosfer berubah-ubah ketinggiannya sesuai dengan
kerapatan elektron yang terkandung di dalamnya. Lapisan ionosfer
terdiri dari lapisan D,E, F1 dan F2. Lapisan ionosfer F2 merupkan
lapisan trepenting dalam sistem komunikasi HF. Hal tersebut disebabkan
karena lapisan F2 selalu ada ketika lapisan di bawahnya menghilang.
Kerapatan elektron suatu lapisan ionosfer tergantung pada cahaya
matahari, iklim, dan lokasi. Perbedaan ketinggian ionosfer
mempengaruhi frekuensi HF yang dapat dipantulkan. Makin tinggi
kerapatan elektron ionosfer maka frekuensi yang dapat dipantulkan
adalah frekuensi yang makin tinggi. Sistem komunikasi radio HF
digunakan untuk sistem komunikasi jarak jauh. Semakin jauh jarak dari
pemancar ke penerima maka delay propagasi akan semakin besar.
Apalagi ditambah dengan media propagasi yang berubah-ubah
tergantung lapisan yang memantulkan frekuensi. Maka jarak tempuh
lintasan akan berbeda dan berpengaruh terhadap delay propagasinya.
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Radio communication systems High Frequency (HF) has the
advantage that can provide long-distance transmission, relatively low
cost and flexible. HF communication system using the ionosphere as a
medium wave transmission. The signal from the antenna will propagates
in the ionosphere and the media will then be reflected towards the
receiver. Media ionosphere change its height according to the density of
electrons contained therein. Ionosphere layer consists of layers D, E, F1
and F2. Ionosphere F2 layer merupkan trepenting in HF
communications systems. This is because there is always the F2 layer
when the layer bawhanya disappeared. A layer ionospheric electron
density depends on sunlight, climate, and location. The difference in
height of the ionosphere affects the HF frequency that can be reflected.
The higher the electron density of the ionosphere, the frequency can be
reflected is that the higher the frequency. HF radio communication
system is used for long-distance communication systems. The farther
the distance from the transmitter to the receiver, the propagation delay
will be even greater. Moreover, coupled with the propagation medium
changes depending on the frequency reflective layer. Then track mileage
will vary and affect the propagation delay.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSE 621.384 11 Rah p |
| Uncontrolled Keywords: | Komunikasi HF; ionosfer; delay; HF Communication; ionosphere; delay |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5105 Data Transmission Systems |
| Divisions: | Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Anis Wulandari |
| Date Deposited: | 03 Jul 2017 07:48 |
| Last Modified: | 27 Dec 2018 06:42 |
| URI: | http://repository.its.ac.id/id/eprint/41849 |
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