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Fasciculus:UHF TV Antenna 001.JPG

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Summarium

Descriptio
English: Yagi antenna for UHF HDTV reception. The antenna's main lobe is off the right end of the antenna; it is most sensitive to stations in that direction. Each of the metal crossbars along the antenna support boom is called an element, which acts as a half-wave dipole resonator for the radio waves. The antenna has one driven element which is attached to the TV; it is behind the black box (left). The black box is a preamplifier which increases the power of the TV signal before it is sent to the TV set. The 17 elements to the right of the driven element are called directors; they reinforce the signal. The 4 elements on the V shaped boom (left) are called a "corner reflector"; they serve to reflect the signal back toward the driven element. Yagi HDTV antennas use a corner reflector to increase the bandwidth of the antenna. The rest of the antenna increases the gain at higher channels, while the corner reflector increases the gain at lower channels.
Datum
Fons Opus proprium
Auctor Tennen-Gas
Permissio
(Reusing this file)		 GFDL

Potestas usoris

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Captions

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UHF television antenna

Items portrayed in this file

depicts Anglica

television antenna Anglica

copyright status Anglica

copyrighted Anglica

captured with Anglica

Canon EOS 5D Anglica

inceptio

18 Octobris 2008

exposure time Anglica

0.0125 secundum

f-number Anglica

4

focal length Anglica

200 millimetrum

ISO speed Anglica

320

media type Anglica

image/jpeg

Historia fasciculi

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Dies/TempusMinutioDimensionesUsorSententia
recentissima06:43, 6 Novembris 2008Minutum speculum redactionis 06:43, 6 Novembris 2008 factae1 000 × 400 (164 chiliocteti)天然ガス{{Information |Description={{en|1=Yagi UHF TV antenna}} |Source=Own work |Author=Tennen-Gas |Date=18 October 2008 |Permission=GFDL |other_versions= }} <!--{{ImageUpload|full}}--> Category:Television Antenna

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