1.

BWFN of a paraboloid antenna with circular aperture assuming feed is isotropic is ____(a) \(\frac{140λ}{d} \)(b) \(\frac{115λ}{d} \)(c) \(\frac{58λ}{d} \)(d) \(\frac{40λ}{d} \)This question was addressed to me by my school principal while I was bunking the class.I want to ask this question from Parabolic Reflector Antenna in portion Reflector Antenna of Antennas

Answer»

Right option is (a) \(\frac{140λ}{d} \)

Easy EXPLANATION: A paraboloid antenna with a circular APERTURE has

BWFN (Beam width between two FIRST NULLS) =\(\frac{140λ}{d}, \) (d is DIAMETER of circular aperture)

For a rectangular aperture \(BWFN =\frac{115λ}{L}, \) (L is length of rectangular aperture).


Discussion

No Comment Found

Related InterviewSolutions