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Gain of a Dipole Versus Height from ground - RF Cafe Forums

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Steve
 Post subject: Gain of a Dipole Versus Height from ground
Posted: Thu Jun 23, 2005 3:24 am 
The gain of a dipole is (supposedly) well known at 2.15 dBi. However, this is only true for a dipole in free space and in practice most real world dipoles are going to be plcaed at a finite distance above ground. Unless I have a large carpet made from RF absorbent material (NO) then the only other option to ensure the dipole has the theoretical gain is to get it far enough from ground that it behaves as if it is in free space. The big question is how far does this need to be ? ANYONE CARE TO HAVE A STAB AT THIS ???



Posted  11/12/2012