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dynamically tunable antennas

 
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larrymorrell
Antenna-Theory.com Newbie


Joined: 25 Sep 2013
Posts: 1
PostPosted: Wed Sep 25, 2013 11:02 pm    Post subject: dynamically tunable antennas Reply with quote
Does anyone have any experience using varactors, pin diodes, etc to dynamically change the electrical length of an antenna? Especially in cell phone frequency bands: 700MHz to 2.7.GHz
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Schubert
Antenna Wizard


Joined: 08 Apr 2009
Posts: 161
PostPosted: Thu Sep 26, 2013 1:47 am    Post subject: Reply with quote
Well, switches and varactors are typically used in the impedance matching network of the antenna to tune the antennas to different frequencies.

It's tough to change the electrical length of the antenna, unless it is a slot type, where you can shorten it with swtiches. But the more common "dipole" antenna type would not work so well for that.
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