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Optimizing Antenna Design for Near-Field Operation - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement


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

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