Two dissimilar antennas having their maximum directivities equal,_.
(a) must have their beam widths also equal
(b) cannot have their beam widths equal because they are dissimilar antenna
(c) may not necessarily have their maximum power gains equal
(d) must have their effective aperture areas (capture areas) also equal
Ans :- (a)
D_1=D_2, therefore two dissimilar antennas having their maximum directivities equal must have their widths also equal depicting same things.