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vivek_2952
Antenna-Theory.com Newbie
Joined: 12 Jul 2010
Posts: 3
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 Posted: Mon Jul 12, 2010 12:12 pm Post subject: Passive Antenna with gain |
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| If antenna is passive device then how gain is working in passive device? |
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bigSteve
Antenna Wizard
Joined: 14 Mar 2009
Posts: 265
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| Posted: Mon Jul 12, 2010 1:34 pm Post subject: |
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Gain is the ratio of the power transmitted in a certain direction relative to that of an antenna that radiates power equally in all directions.
So if an antenna has a directional radiation pattern, then in the direction of maximum radiation for instance, more power will be radiated relative to the isotropic antenna.
This "increased relative energy" is the gain. It's not a power amplification. Hope this helps |
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vivek_2952
Antenna-Theory.com Newbie
Joined: 12 Jul 2010
Posts: 3
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| Posted: Wed Jul 14, 2010 6:26 am Post subject: why to use polarization |
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| why we used Polarization, and for which type of clutter we polarzied antennas, types of polazarion. |
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