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Nathaniel Nicholas Norvin Lambok Mangatas
"Pengukuran antena dilakukan dengan tujuan untuk mengetahui karakteristik radiasi sebuah antena, dengan proses pengukuran dilakukan di ruang laboratorium Prof. Fitri Yuli Zulkifli di DTE Universitas Indonesia. Proses pengukuran masih dilakukan secara manual dan beberapa parameter seperti pola radiasi membutuhkan waktu yang cukup lama untuk melakukan pengambilan data. Dengan demikian, dibutuhkan sistem pengukuran antena secara otomatis yang dapat mengendalikan instrumen pengukuran antena yang sudah tersedia untuk mempermudah proses pengambilan data untuk pengukuran antena. Dalam penelitian ini, dirancang sistem pengukuran karakterisasi antena secara otomatis dengan menggunakan library libFTDI dan R&S VISA untuk mengendalikan instrumen pengukuran Vector Network Analyzer (VNA ) dan rotator antena. Hasil implementasi dan pengujian aplikasi menunjukkan bahwa sistem pengukuran yang diajukan dapat mempermudah dan mempersingkat proses pengukuran antena dimana hasil pengukuran pola radiasi pada tahapan sudut 10 dan 5 derajat berturut-turut membutuhkan waktu 3 dan 5 menit.

Antenna measurements are conducted to determine radiation characteristics of the antenna. Measurements conducted in Prof. Fitri Yuli Zulkifli laboratory DTE Uniiversity of Indonesia is still done manually, and some parameter such as radiation pattern is labor-intensive and takes a lot of time to collect the data required. An automated measurement system required to control instrument measurements in the laboratory to measure radiation characteristics of the antenna automatically. This research proposed an automatic antenna radiation characteristics measurement system with libFTDI and R&S VISA library used to control and communicates Vector Network Analyzer (VNA) and antenna rotator. The result showed that the proposed system could facilitate users to measure antenna under test, where the measurement results of radiation pattern at 10 and 5 degrees respectively takes 3 and 5 minutes to run."
Depok: Fakultas Teknik Universitas Indonesia, 2021
S-pdf
UI - Skripsi Membership  Universitas Indonesia Library
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Catur Apriono
"Untuk mengukur kinerja dari antenna, sistem pengukuran yang biasanya digunakan adalah metode medan jauh. Namun, jika antena memiliki ukuran besar, terjadi masalah berkaitan dengan besarnya jarak yang diperlukan dalam pengukuran metode medan jauh untuk mengukur pola radiasi antena. Sehingga pengukuran antenna yang dilakukan di sebuah anechoic chamber dengan ruang terbatas tidak dapat dilakukan. Salah satu solusi untuk mengatasi masalah ini adalah dengan menggunakan metode medan dekat. Terdapat tiga metode yang dikenal pada pengukuran medan dekat, yaitu permukaan planar, cylindrical dan spherical.
Desain dari medan dekat dengan menggunakan metode permukaan planar memberikan kelebihan pada kesederhanaan rumus penghitungan dan proses dibandingkan dengan metode medan dekat lainnya. Rancangan terdiri dari tiga bagian utama yaitu daerah scanning, peralatan pengukuran dan peralatan komputasi.
Daerah scanning yang dirancang untuk menutupi permukaan planar di medan dekat antena di uji (AUT). Peralatan komputer akan mencatat data dari peralatan pengukuran untuk setiap titik sampel yang ditentukan dari daerah scanning. Data medan jauh didapatkan dengan transformasi dari data medan dekat ke medan jauh dengan menggunakan metode fast Fourier transform (FFT).
FFT adalah metode yang lebih efisien untuk proses perhitungan dibandingkan dengan metode lainnya. Hasil transformasi data dapat menunjukkan pola radiasi medan jauh dari antena. Hasilnya menunjukkan bahwa pola radiasi yang diukur dari metode medan dekat hampir sama jika dibandingkan dengan pengukuran medan secara langsung.

To measure the performance of an antenna, the measurement system which is usually used is the far field method. However, if the antenna has a large size, a problem occurs concerning the large distance needed for the far field method to measure the radiation pattern of the antenna. For an antenna measurement conducted in an anechoic chamber with limited space, this cannot be achieved. One solution to overcome this problem is to use near field method. There are three near field methods known which are the planar, cylindrical and spherical surface.
In this paper, the design of the near field method with planar surface is proposed due to the advantages of the formula and computation process simplicity compared with the other near field surface methods. The design consists of three main parts namely the scanning area, measurement equipment and computation equipment.
The scanning area is designed to cover the planar surface in the near field region of the antenna under test (AUT). The computer equipment will record the data from the measurement equipment for each sampling points determined from the scanning area. The data is transformed from near field to far field data using the fast Fourier transform (FFT) method.
This FFT method is more efficient for the computer process compared to other method. The transformed data can show the far field radiation pattern of the antenna. The result show that the radiation pattern measured from the near field method is similar compared to the far field measurement.
"
Depok: Fakultas Teknik Universitas Indonesia, 2009
S51445
UI - Skripsi Open  Universitas Indonesia Library
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Ajeng Diah Ayulakswi
"[ABSTRAK
Perkembangan bisnis dan martketing yang sangat cepat mendorong naiknya
kebutuhan akan media telekomunikasi yang reliable, menarik, dan dinamis. Metode
dalam penyebaran informasi yang populer digunakan saat ini adalah penyiaran. Dimana
penggunaan spektrum frekuensi radio untuk keperluan penyiaran mengacu pada definisi
layanan penyiaran pada peraturan radio ITU. Layanan penyiaran adalah suatu servis
komunikasi radio dimana transmisinya ditujukan untuk penerimaan langsung oleh
masyarakat umum. Penyiaran televisi lebih sering digunakan sebagai sarana penyebaran
informasi dibandingkan dengan radio, karena dapat menyampaikan informasi secara jelas
dengan suara dan gambar. Semakin luas daerah jangkauan siaran suatu stasiun TV, maka
akan semakin banyak manfaat yang dapat dirasakan karena informasi dapat diterima
dengan baik oleh masyarakat.
Terdapat dua stasiun TV swasta di Bandung yang akan melakukan perluasan
wilayah ke kota yang berdekatan, yaitu di kota Garut dan Sukabumi dengan
menambahkan repeater baru serta menaikkan daya pancarnya. Kedua stasiun TV swasta
di Bandung tersebut menempati kanal 42 dan 44. Kedua stasiun TV tersebut merupakan
pemancar TV analog dan akan menggunakan kanal yang sama pada kota Garut dan
Sukabumi. Kedua stasiun TV analog ini memiliki kanal bersebelahan dengan stasiun TV
analog dan stasiun TV digital. Penambahan repeater baru dan menaikkan daya pancarnya
dapat memungkinkan terjadinya interferensi kanal bersebelahan. Untuk mengatasi hal
tersebut, maka dibuat sebuah aturan bahwa kuat medan penerimaan televisi siaran UHF
pada lokasi titik pengujian atau pengukuran setiap wilayah layanan dibatasi paling besar
70 dBμV/m untuk band V.
Skripsi ini bertujuan untuk menganalisis simulasi daya pancar untuk perluasan
wilayah siaran TVdari Bandung ke Garut dan Sukabumi, dengan menentukan pola radiasi
dan menaikan daya pancar repeater baru dengan batasan rasio proteksi agar daerah
jangkauan dan populasi di kota Garut dan Sukabumi terlayani. Hasil dari simulasi
diperoleh daya pancar pada kanal 42 dan 44 di kota Garut sebesar 42 dBW dengan
antena 4-1 dan daya pancar pada kanal 42 dan 44 di kota Sukabumi sebesar 38,3 dBW
dengan antena 730 372. Dengan penggunaan daya pada masing-masing pemancar
tersebut telah memenuhi wilayah cakupan yang terlayani pada kota Garut dan Sukabumi
dan pemancar yang digunakan tidak menginterferensi kanal yang bersebelahan. Namun
terdapat beberapa wilayah yang tidak tercakup sinyal pancar karena kontur wilayah yang
bergunung-gunung.
Kata kunci : interferensi
ABSTRACT
The rapid growth of various business and marketing leads to the needs of reliable,
attractive, and dynamic telecommunication media. Broadcasting is one of the popular
media which ever used in centuries. In the practical utilities, the broadcasting services use
a particular radio spectrum frequency with respect to the ITU-T standard. The
broadcasting services provide the essential informations which are directly served to the
public user. Broadcasting is rather used to publicize the information than the radio due to
its perceptibility through the sound and image repsentations. Consequently, the larger the
coverage area of the broadcasting services the more advantages can be obtained because
the informations can be delivered properly to the user.
In this final project, there are two private television provider where both are
located in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.
In order to broaden their coverage area, they increased the number of repeater and the
level of power used by the transmitter respectively. Unfortunately, this method leads to an
adjacent channel interference. In order to withstand this effect, policies are made to limit
the usage of the bandwidth. For every service area the allocation is set to be at a
maximum of 70 dBμV/m for V band.
This final project is aimed to analyze the power used by the transmission to
broaden the coverage area of the television services from Bandung to Garut and
Sukabumi. The radiation patterns enhancement and the increase of transmitted power by
the new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42
dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennas
respectively in the 42nd and 44th channels. In the attained transmitted power, the adjacent
channel interference can be evaded. In case of the extending the coverage area, there are
still some particular areas which are delicate to overcome due to its geograhical contour
which are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,
attractive, and dynamic telecommunication media. Broadcasting is one of the popular
media which ever used in centuries. In the practical utilities, the broadcasting services use
a particular radio spectrum frequency with respect to the ITU-T standard. The
broadcasting services provide the essential informations which are directly served to the
public user. Broadcasting is rather used to publicize the information than the radio due to
its perceptibility through the sound and image repsentations. Consequently, the larger the
coverage area of the broadcasting services the more advantages can be obtained because
the informations can be delivered properly to the user.
In this final project, there are two private television provider where both are
located in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.
In order to broaden their coverage area, they increased the number of repeater and the
level of power used by the transmitter respectively. Unfortunately, this method leads to an
adjacent channel interference. In order to withstand this effect, policies are made to limit
the usage of the bandwidth. For every service area the allocation is set to be at a
maximum of 70 dBμV/m for V band.
This final project is aimed to analyze the power used by the transmission to
broaden the coverage area of the television services from Bandung to Garut and
Sukabumi. The radiation patterns enhancement and the increase of transmitted power by
the new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42
dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennas
respectively in the 42nd and 44th channels. In the attained transmitted power, the adjacent
channel interference can be evaded. In case of the extending the coverage area, there are
still some particular areas which are delicate to overcome due to its geograhical contour
which are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,
attractive, and dynamic telecommunication media. Broadcasting is one of the popular
media which ever used in centuries. In the practical utilities, the broadcasting services use
a particular radio spectrum frequency with respect to the ITU-T standard. The
broadcasting services provide the essential informations which are directly served to the
public user. Broadcasting is rather used to publicize the information than the radio due to
its perceptibility through the sound and image repsentations. Consequently, the larger the
coverage area of the broadcasting services the more advantages can be obtained because
the informations can be delivered properly to the user.
In this final project, there are two private television provider where both are
located in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.
In order to broaden their coverage area, they increased the number of repeater and the
level of power used by the transmitter respectively. Unfortunately, this method leads to an
adjacent channel interference. In order to withstand this effect, policies are made to limit
the usage of the bandwidth. For every service area the allocation is set to be at a
maximum of 70 dBμV/m for V band.
This final project is aimed to analyze the power used by the transmission to
broaden the coverage area of the television services from Bandung to Garut and
Sukabumi. The radiation patterns enhancement and the increase of transmitted power by
the new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42
dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennas
respectively in the 42nd and 44th channels. In the attained transmitted power, the adjacent
channel interference can be evaded. In case of the extending the coverage area, there are
still some particular areas which are delicate to overcome due to its geograhical contour
which are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,
attractive, and dynamic telecommunication media. Broadcasting is one of the popular
media which ever used in centuries. In the practical utilities, the broadcasting services use
a particular radio spectrum frequency with respect to the ITU-T standard. The
broadcasting services provide the essential informations which are directly served to the
public user. Broadcasting is rather used to publicize the information than the radio due to
its perceptibility through the sound and image repsentations. Consequently, the larger the
coverage area of the broadcasting services the more advantages can be obtained because
the informations can be delivered properly to the user.
In this final project, there are two private television provider where both are
located in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.
In order to broaden their coverage area, they increased the number of repeater and the
level of power used by the transmitter respectively. Unfortunately, this method leads to an
adjacent channel interference. In order to withstand this effect, policies are made to limit
the usage of the bandwidth. For every service area the allocation is set to be at a
maximum of 70 dBμV/m for V band.
This final project is aimed to analyze the power used by the transmission to
broaden the coverage area of the television services from Bandung to Garut and
Sukabumi. The radiation patterns enhancement and the increase of transmitted power by
the new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42
dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennas
respectively in the 42nd and 44th channels. In the attained transmitted power, the adjacent
channel interference can be evaded. In case of the extending the coverage area, there are
still some particular areas which are delicate to overcome due to its geograhical contour
which are mainly mountains., The rapid growth of various business and marketing leads to the needs of reliable,
attractive, and dynamic telecommunication media. Broadcasting is one of the popular
media which ever used in centuries. In the practical utilities, the broadcasting services use
a particular radio spectrum frequency with respect to the ITU-T standard. The
broadcasting services provide the essential informations which are directly served to the
public user. Broadcasting is rather used to publicize the information than the radio due to
its perceptibility through the sound and image repsentations. Consequently, the larger the
coverage area of the broadcasting services the more advantages can be obtained because
the informations can be delivered properly to the user.
In this final project, there are two private television provider where both are
located in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.
In order to broaden their coverage area, they increased the number of repeater and the
level of power used by the transmitter respectively. Unfortunately, this method leads to an
adjacent channel interference. In order to withstand this effect, policies are made to limit
the usage of the bandwidth. For every service area the allocation is set to be at a
maximum of 70 dBμV/m for V band.
This final project is aimed to analyze the power used by the transmission to
broaden the coverage area of the television services from Bandung to Garut and
Sukabumi. The radiation patterns enhancement and the increase of transmitted power by
the new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42
dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennas
respectively in the 42nd and 44th channels. In the attained transmitted power, the adjacent
channel interference can be evaded. In case of the extending the coverage area, there are
still some particular areas which are delicate to overcome due to its geograhical contour
which are mainly mountains.]"
Fakultas Teknik Universitas Indonesia, 2016
S62067
UI - Skripsi Membership  Universitas Indonesia Library