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Optimizing antenna design for near-field operation - RF Cafe Forums
Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


gt7235d
 Post subject: Optimizing antenna design for near-field operation
Posted: Tue Apr 11, 2006 1:35 pm 
 
Lieutenant

Joined: Tue Apr 11, 2006 1:31 pm
Posts: 1
Hi Everyone,

If I want to optimize an antenna (at around 1GHz) for magnetic near-field coupling, what options do I have? Off hand, I'm thinking that something like a loop antenna would be a good start, as the magnetic field dominates in the near-field. Still, is there some way to minimize my far-field radiation while getting good near-field coupling?

I'd appreciate any insights! Thanks!


 
   
 
karthik
 Post subject:
Posted: Tue Apr 11, 2006 8:21 pm 
 
Colonel

Joined: Tue Apr 11, 2006 8:13 pm
Posts: 34
Hi gt7235d,

You could use a shielded loop. This should effectively ensure that there is no E-field and all you would be left with is the H-field since the tangential component of E field on the conductor being used as the shield should be 0.




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