An antenna includes a substantially planer substrate and a helical
winding. The substantially planer substrate includes a first surface and
a second surface. The helical winding includes a first pattern, a second
pattern, and a plurality of interconnections. The first pattern is
affixed to the first surface and the second pattern is affixed to the
second surface. Connection nodes of the first pattern are coupled to
associated connection nodes of the second pattern by the plurality of
interconnections.