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simple question

 
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muffin the mule
Antenna-Theory.com Newbie


Joined: 22 Apr 2009
Posts: 1

PostPosted: Wed Apr 22, 2009 2:38 pm    Post subject: simple question Reply with quote

Hello,

I just discovered your site.

I've got an antennas exam imminently, and just wanted to ask a couple of things...



Can anyone draw a picture of a 2-dimensional high-gain antenna radiation pattern ...I've got an idea what it might look like, and I just want to see whether it matches up to what anyone here thinks.

cheers, Embarassed
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Schubert
Antenna Wizard


Joined: 08 Apr 2009
Posts: 161

PostPosted: Wed Apr 22, 2009 6:19 pm    Post subject: High Gain Radiation Pattern Reply with quote

For a 3d view of a high gain radiation pattern, see
http://www.antenna-theory.com/antennas/reflectors/dish4.php

High gain on your test probably means "highly directional" in which case the radiation pattern would concentrate most of the energy towards a single direction.

A 2d gain pattern might look like Figure 1:
http://www.antenna-theory.com/antennas/travelling/yagi3.php

Just make the "main beam" more narrow and the sidelobes lower.
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