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slffea AntennaTheory.com Newbie
Joined: 19 Oct 2009 Posts: 3 Location: California

Posted: Mon Oct 19, 2009 11:33 pm Post subject: maths on page http://www.antennatheory.com/tutorial/wavegui 


I'm going over the math on the page:
http://www.antennatheory.com/tutorial/waveguides/waveguides2.php
and I think there are some mistakes when you discuss the zeroing out of
constants based on the boundary conditions. Specifically, when you
talk about the constant c3, you accidentally refer to it as c4. Look at
the discussion below where you talk about the boundary condition:
Ex(x, y=b, z)=0 [10]
Similarly, I think there is a mistake when talking about c2 and c1 and
the boundary conditions:
Ey(x=0, y, z)=0
Ey(x=a, y, z)=0
For Ey = 1/eta(dFz/dx)
at x=0.0, the c1*cos(kx*x) becomes c1*sin(kx*x) which is 0 at x = 0. So it
is the c2 term that should be 0.
Thanks. 

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admin Site Admin
Joined: 03 Jan 2007 Posts: 201

Posted: Tue Oct 20, 2009 5:47 am Post subject: 


Wow, those were both good catches. I updated the page so that it now refers to the correct constants. Thank you very much. 

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slffea AntennaTheory.com Newbie
Joined: 19 Oct 2009 Posts: 3 Location: California


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admin Site Admin
Joined: 03 Jan 2007 Posts: 201

Posted: Thu Oct 22, 2009 4:05 am Post subject: 


Thanks again. I fixed the mistake. 

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