Driven element is directly
connected to the transmission line and receives power from or
is driven by the source. Whereby parasitic elements are not
connected to the transmission line; they receive energy only
through mutual induction with a driven element or another
parasitic element. A parasitic element that is longer than the
driven element from which it receives energy is called a
reflector. A reflector affected the signal strength by reducing in
its direction but increases it in the opposite direction. Hence, it
acts as if it were a concave mirror.