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Advantages of Differential feeding in antennas

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Grubby1984

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Hi there,

I understand there are many advantages of differential feeding techniques in antennas and that they are very widely used in IC's nowadays.

Advantages may include self-matching, low spurious radiation. I was also told that it is also much "cleaner" in the sense that it eliminates other high order modes of transmission.

Can anyone confirm this or point out in what other ways is the differential feeding technique more advantageous?
 

Differential feeding in antennas keeps the advantages of the differential amplifiers: high IP2, improved common mode susceptibility, supply noise suppression, low integration cost, and also simplifies the feeding of some types of antennas that may require a balun: Dipole, Loop, Yagi, Vivaldi, etc.
 

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