Optimizing antenna design for near-field operation - RF Cafe Forums

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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.

Posted  11/12/2012