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Microstrip (Patch) Antennas RP equation

 
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vreg
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Joined: 15 Oct 2015
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PostPosted: Thu Oct 15, 2015 5:44 am    Post subject: Microstrip (Patch) Antennas RP equation Reply with quote

Hi,

On the http://www.antenna-theory.com/antennas/patches/antenna.php page, the equation for the radiation pattern of the patch antenna seems to be wrong:

for phi=0, both E(phi) and E(theta) are equal to 0 (since sin(phi) = 0),

But the diagram shows a circular field pattern for phi=0...
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admin
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Joined: 03 Jan 2007
Posts: 197

PostPosted: Thu Oct 15, 2015 4:58 pm    Post subject: Reply with quote

no, E_theta is proportional to sin( constant*sin(phi) )/sin(phi), which doesn't go to zero....look up sinc function
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vreg
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Joined: 15 Oct 2015
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PostPosted: Fri Oct 16, 2015 5:14 am    Post subject: Reply with quote

Oh, didn't realize there was a 0 in the denominator term as well... thanks..
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