can anyone help me out please......

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1 total messages Started by Ken Van Thu, 18 May 2000 00:00

#150

Author: Ken Van
Date: Thu, 18 May 2000 00:00

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Hi. All.

I have a problem on my homework.  i couldn't solve it.  Can anyone
help me please?....

here is the problem.

an antenna array consists of two infinite plane parallel sheets in the
xy plane spaced half a wavelength apart and having surface current
densities

Js1 = - Js0 coswt i             z = 0
Js2 = Js0 sinwt i                z= Lambda/2

the electromagnetic wave is propagating in vacuum.  The time average
of the Poynting vector is required to be 500 W/(m*m) to the right of
the second antenna (z > Lambda/2).  What surface current Js0 is
needed?

This problem is on the Electical engineering---electromagnetic
radiation course.

Please, if anyone solve this problem can you email to
kengvan@hotmail.com

Thank you.....

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