A simple theory of infinite, uniform, periodic structres is adapted here to
finite log - periodic devices. This theory, with the aid of /k diagrams, provides
a great deal of insight into the operation of frequenecy - independent antennas.
While the : theory does not give detailed information about the radiation
patterns of the antennas, it does allow the angle of beam maximum to be calculated
and gives information concerning possible sidelobes and backlobes. The advantages
of this theory are its simplicity, and the insight it provides into frequency -Indepen,
dent antenna design generally. In addition, a number of antenna characteristics
can be deduced from /k diagrams.
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