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16. Consider a uniformly illuminated rectangular aperture mounted on a ground plane with a = 2.5\lambda and b = 1.5\lambda. a) In the E-plane, where are the nulls? b) What is the HPBW in the E-plane? c) What is the position of the first side lobe in the E-plane? d) What is the directivity? e) If this same aperture were operated in the TE$_{10}$ mode, what would be the directivity? 17. Consider a very thin slot in a conducting plane with length \lambda/2. Use Babinet's principle to determine the impedance of the slot.

          16. Consider a uniformly illuminated rectangular aperture mounted on a ground plane with
a = 2.5\lambda and b = 1.5\lambda.
a) In the E-plane, where are the nulls?
b) What is the HPBW in the E-plane?
c) What is the position of the first side lobe in the E-plane?
d) What is the directivity?
e) If this same aperture were operated in the TE$_{10}$ mode, what would be the directivity?
17. Consider a very thin slot in a conducting plane with length \lambda/2. Use Babinet's principle to
determine the impedance of the slot.

16. Consider a uniformly illuminated rectangular aperture mounted on a ground plane with
a = 2.5λand b = 1.5λ.
a) In the E-plane, where are the nulls?
b) What is the HPBW in the E-plane?
c) What is the position of the first side lobe in the E-plane?
d) What is the directivity?
e) If this same aperture were operated in the TE10 mode, what would be the directivity?
17. Consider a very thin slot in a conducting plane with length λ/2. Use Babinet's principle to
determine the impedance of the slot.

Added by -Scar L.

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