Antenna - Theory .com: The Antenna Site

Antenna Basics Antenna Types Smith Charts Antenna Measurements

antenna-theory.com :: View topic - Passive Antenna with gain
antenna-theory.com Forum Index antenna-theory.com
Antenna Theory
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Passive Antenna with gain

 
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory
View previous topic :: View next topic  
Author Message
vivek_2952
Antenna-Theory.com Newbie


Joined: 12 Jul 2010
Posts: 3

PostPosted: Mon Jul 12, 2010 12:12 pm    Post subject: Passive Antenna with gain Reply with quote

If antenna is passive device then how gain is working in passive device?
Back to top
View user's profile Send private message Yahoo Messenger
bigSteve
Antenna Wizard


Joined: 14 Mar 2009
Posts: 265

PostPosted: Mon Jul 12, 2010 1:34 pm    Post subject: Reply with quote

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
Back to top
View user's profile Send private message
vivek_2952
Antenna-Theory.com Newbie


Joined: 12 Jul 2010
Posts: 3

PostPosted: Wed Jul 14, 2010 6:26 am    Post subject: why to use polarization Reply with quote

why we used Polarization, and for which type of clutter we polarzied antennas, types of polazarion.
Back to top
View user's profile Send private message Yahoo Messenger
Display posts from previous:   
Post new topic   Reply to topic    antenna-theory.com Forum Index -> Questions Related to Antenna Theory All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group