Which of the following option is false?
(a) Omni-directional antenna is a special case of directional antenna
(b) Directional antenna radiates power effectively in particular directions compared to other directions
(c) Isotropic antenna radiates power in all directions
(d) End-fire array antenna has its main beam normal to the axis containing antenna
I got this question in my homework.
Query is from Antenna Characteristics in portion Antenna Parameters of Antennas