| Abstract: | An antenna for producing an omni-directional pattern, and using all
frequencies of a frequency range simultaneously, is provided with first
and second electrically conductive elements disposed coaxially relative
to a central axis. The first element has a first surface of revolution
about the axis, the first surface of revolution tapering radially
outwardly while extending axially away from the second element to
terminate at a first axial end of the first element. The second element
has a second surface of revolution about the axis, the second surface of
revolution tapering radially outwardly while extending axially toward the
first element to terminate at a first axial end of the second element.
The first and second surfaces of revolution overlap one another radially
and axially, and are mutually non-conformal. |