0 votes 0 votes The radiation pattern of an antenna in spherical co-ordinates is given by $$F(\theta)=\cos^4\theta\:\:\:;\:\:\:0\le \theta\le \frac{\pi}{2}$$ The directivity of the antenna is $10\:dB$ $12.6\:dB$ $11.5\:dB$ $18\:dB$ Electromagnetics gate2012-ec electromagnetics antennas + – Milicevic3306 asked Mar 25, 2018 • recategorized Nov 15, 2020 by gatecse Milicevic3306 16.0k points 72 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.