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differential vs single-ended feeding of antennas

 
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josephschiller
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Joined: 14 Apr 2016
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PostPosted: Thu Apr 14, 2016 9:56 am    Post subject: differential vs single-ended feeding of antennas Reply with quote

hello, my question is about differential vs single-ended feeding of antennas. what are their pros and cons and their applications? I just want to get an idea of it. Anyone with the know-how kindly explain me? Confused
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coundpake
Antenna Theory Regular


Joined: 03 Aug 2016
Posts: 10
Location: San Jose, CA

PostPosted: Wed Aug 03, 2016 10:23 pm    Post subject: Reply with quote

Usually a single-ended fed antenna uses the system ground as the return path. This can affect the radio by introducing unwanted signals from the rest of the system (desense) and make the radio more sensitive to noise. Also, controlling the return/ground path in a complex system (like a cell phone) can be difficult because currents will be induced on other components (camera, speaker, MLB, etc.).

Differential lines on the other hand are usually dedicated to the antenna and are less sensitive to noise and can be shielded from outside influences. However they require more complex transmission lines.
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