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17.15 Feeding the Antenna
One advantage of the Marconi antenna is that it places the middle of
the dipole at ground level, which is helpful for coupling it to the
sender or receiver. Even so, it is not always convenient to have the
output circuit of a sender close enough to the foot of the antenna to
couple it directly, and it is seldom convenient to have either sender or
receiver at the centre of a suspended dipole, so there is a need for
some means of linking the antenna with the ground equipment.
Chapter 16 showed how the problem can be conveniently and
efficiently solved by means of a transmission line designed to match
the impedanc ...