M

Mr. Dubey • 52.30K Points
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Q.              antennas have gain less than reflector antennas but have more lenient tolerance on surfaces.

(A) helical antennas
(B) lens antennas
(C) array antennas
(D) slot antennas
Correct : Option (B)

Explanation: 
 lens antennas are complex in nature but are able to scale wider angles. in comparison to reflectors, their gain is 1 or 2 db less, but these have more lenient tolerance on surfaces. these have less rearward reflection, relatively low loss and can be easily shaped to the desired contours.

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