The document describes two sets of circles with centers located on the x-axis at coordinates (3,0,0) and (-3,0,0) for the first set and (4,0,0) and (-4,0,0) for the second set. Both sets have a radius of lambda and are defined for a frequency F of 10 GHz where the wavelength lambda is 3cm.

2. (3,0,0)
(-3,0,0)
X
Y
For F = 10 GHz and lambda = 3cm,
Radius of the circle= lambda
Centre of Circle1 is (3,0,0)
Centre of Circle2 is (-3,0,0)

4. (4,0,0)
(-4,0,0)
X
Y
For F = 10 GHz and lambda = 3cm,
Radius of the circle= lambda
Centre of Circle1 is (4,0,0)
Centre of Circle2 is (-4,0,0)