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Field of View and the 3dB beamwidth of an antenna

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senmeis

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Hi,

are the Field of View and the 3dB beamwidth of an antenna identical?

Owen
 

jiripolivka

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Hi,

are the Field of View and the 3dB beamwidth of an antenna identical?

Owen

I think you mix optical term"field of view" with RF definition of antenna beam width.

Antenna itself does not "see" anything, only a complete system can, and the radiation pattern shows all important features. For direction finding and similar applications, the beam width defined to -3 dB from a maximum directivity is used.

Field of view is used with cameras, and I have not seen any -3dB definition with it.
 

senmeis

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In attachment you will see an TDRS Single Access antenna which is characterized by FOV. So this attribute can belong to an antenna. The FOV there is 44 degrees x 56 degrees so the 3dB beamwidth is very large.

Owen
 

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jiripolivka

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In attachment you will see an TDRS Single Access antenna which is characterized by FOV. So this attribute can belong to an antenna. The FOV there is 44 degrees x 56 degrees so the 3dB beamwidth is very large.

Owen

If you like it.... I have not seen this optical feature with RF antenna. And again, FOV is a feature of a SYSTEM, not only the antenna.
 

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