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iridium:antennas [2015/08/25 17:59]
77.21.152.56 [Commercial] 33-2600-00-0500 Digikey Link fixed
iridium:antennas [2021/04/18 12:35] (current)
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 To receive Iridium signals you need an antenna which is able to receive at this frequency and ideally also uses RHCP. To receive Iridium signals you need an antenna which is able to receive at this frequency and ideally also uses RHCP.
  
-If the antenna uses liner polarization, you can expect a loss of about 3 dB. If the antenna is left-hand circular polarized, you can expect a loss of about 30 dB. See http://sv1bsx.50webs.com/antenna-pol/polarization.html for details on this topic.+If the antenna uses liner polarization, you can expect a loss of about 3 dB. If the antenna is left-hand circular polarized, you can expect a loss of about 30 dB. See http://www.qsl.net/sv1bsx/antenna-pol/polarization.html for details on this topic.
  
 All following antennas use RHCP unless otherwise noted. All following antennas use RHCP unless otherwise noted.
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 | IAA.01.121111    | Taoglas                | 1 m SMA cable   | 25 USD           | [[http://www.mouser.com/ProductDetail/Taoglas/IAA01121111/?qs=sGAEpiMZZMt9rZLnhhqRz3ld4Fm2CGGq|Mouser]] | | IAA.01.121111    | Taoglas                | 1 m SMA cable   | 25 USD           | [[http://www.mouser.com/ProductDetail/Taoglas/IAA01121111/?qs=sGAEpiMZZMt9rZLnhhqRz3ld4Fm2CGGq|Mouser]] |
 |ADA-A1621-S       | ADACTUS                | 2 m SMA cable   | 50 USD           | [[http://www.newark.com/adactus/ada-a1621-s/antenna-iridium-sat-comms-mag/dp/55T5184|Farnell(US)]] [[http://de.farnell.com/adactus/ada-a1621-s/antenne-iridium-sat-comms-mag/dp/1899486|Farnell(DE)]] [[https://hbe-shop.de/Art-1899486-ADACTUS-ADA-A1621-S-ANTENNEIRIDIUM-SAT-COMMSMAG-MT|HBE(DE)]] | |ADA-A1621-S       | ADACTUS                | 2 m SMA cable   | 50 USD           | [[http://www.newark.com/adactus/ada-a1621-s/antenna-iridium-sat-comms-mag/dp/55T5184|Farnell(US)]] [[http://de.farnell.com/adactus/ada-a1621-s/antenne-iridium-sat-comms-mag/dp/1899486|Farnell(DE)]] [[https://hbe-shop.de/Art-1899486-ADACTUS-ADA-A1621-S-ANTENNEIRIDIUM-SAT-COMMSMAG-MT|HBE(DE)]] |
 +|TW2600A           | Tallysman Wireless Inc | ?               | ?                | [[https://www.tallysman.com/index.php/gnss/products/antennas-iridium/tw2600a/|Tallysman TW2600A]] |
 +|TW2643A           | Tallysman Wireless Inc | ?               | ?                | [[https://www.tallysman.com/index.php/gnss/products/antennas-gpsbeidougalileoglonass/tw2643a/|Tallysman TW2643A]] |
  
-Most of these have a magnetic mount. They need some kind of metal plane bellow them to work properly. A small metal patch of about 20 cm in diameter (round or square) is more than adequate.+Most of these have a magnetic mount. They need some kind of metal plane below them to work properly. A small metal patch of about 20 cm in diameter (round or square) is more than adequate.
 ===== Modified Active GPS Antennas===== ===== Modified Active GPS Antennas=====
 As the GPS band is very close to the Iridium band, active GPS antennas can be used as a basis for an active Iridium antenna. As the GPS band is very close to the Iridium band, active GPS antennas can be used as a basis for an active Iridium antenna.
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 ===== Self Made ===== ===== Self Made =====
  
 +Exchanging a smaller package for something more sensitive like the following design will require more filters an LNAs. Amplifier noise can be reduced with better components when compared to an active GPS antenna.
  
 + 
  
 +LNA4ALL: http://lna4all.blogspot.com/2013/04/lna-for-all-low-noise-amplifier-for.html
 +
 +L-Band Filter: http://adsbfilter.blogspot.com/2016/02/l-band-inmarsat-thuraya-iridium-gps.html
 +
 +Patch Antenna Design: https://www.rtl-sdr.com/building-and-testing-an-l-band-patch-antenna-for-inmarsat-c-reception/
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