Ive just started studying antenna theory and after a good 2 weeks of research on the forum, understood to a certain extent about how the antenna radiates waves. But, I'm still haunted by radiation patterns. Why should the radiated power be a function of theta, and how exactly do we get the radiation patterns?..Further, the standing wave patterns, the current-voltage distributions that are shown, must also be a function of time. Why is it that we consider the distribution only along the length of the antenna? Sorry if the question seem naive...ive just started on this subject.