Which of the following uses a concave sub-reflector in a dual reflect – McqOptions

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1.	Which of the following uses a concave sub-reflector in a dual reflector antenna?
A.	Cassegrain
B.	Gregorian
C.	Both Gregorian &Cassegrain
D.	Neither Gregorian nor Cassegrain
Answer» C. Both Gregorian &Cassegrain

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