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File:LNB dissassembled.JPG

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https://commons.wikimedia.org/wiki/File:LNB_dissassembled.JPG#mw-jump-to-license

Summary

Description
Deutsch: Ein zerlegter LNB.
English: Low-noise block downconverter (LNB) from a satellite television dish, disassmbled. This is mounted at the focus of the satellite dish and converts the microwave ku band signal from the satellite to a lower intermediate frequency which is sent down the coaxial cable into the house to the set-top box at the user's TV. A feed horn collects the microwaves from the dish into a circular waveguide which passes through the hole in the circuit board. The two metal pins visible at the edge of the hole act as antennas to receive the two orthogonal circularly polarized microwave signals. On the circuit board a local oscillator creates a signal which is mixed with the microwave signal, creating the intermediate frequencies, which are output to the coaxial cable through the connectors at bottom.
Date
Source Satmap
Author Satmap
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Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
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inception

21 January 2007

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Date/TimeThumbnailDimensionsUserComment
current23:15, 5 April 2010Thumbnail for version as of 23:15, 5 April 20102,058 × 3,108 (1.36 MB)Materialscientistcrop whitespace, compression (huge file)
16:16, 10 August 2008Thumbnail for version as of 16:16, 10 August 20082,297 × 3,533 (6.17 MB)Satmap~commonswiki{{Information |Description= |Source= |Date= |Author= |Permission= |other_versions= }}
16:08, 10 August 2008Thumbnail for version as of 16:08, 10 August 20083,533 × 2,297 (6.08 MB)Satmap~commonswiki{{Information |Description= |Source= |Date= |Author= |Permission= |other_versions= }}
18:56, 12 April 2007Thumbnail for version as of 18:56, 12 April 20073,168 × 2,376 (3.34 MB)Satmap~commonswiki{{Information |Description= LNB dissassembled |Source= ~~~ |Date= 21. Jan 2007 |Author= ~~~ |Permission= |other_versions= }}

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