A rectangular horn antenna has an aperture area of 3λ × 2λ. If the – McqOptions

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1.	A rectangular horn antenna has an aperture area of 3λ × 2λ. If the aperture efficiency of an antenna is 90%, then the directivity of the antenna is:
A.	19 db
B.	17.1 db
C.	13 db
D.	21.1 db
Answer» C. 13 db

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