respectively, are loaded into the square patch for
inducing the two CP frequencies. Their respective positions are
mm, mm, and mm. The L-shaped
ground plane is comprised of two major sections, namely,
the horizontal section of size ( ) mm mm
and vertical section of size mm mm. The main
radiating patch is supported above the horizontal section of the
L-shaped ground plane with an air gap of 53 mm by two plastic
screws and an SMA connector, in which this SMA connector is
soldered firmly to the vertical section of the L-shaped ground
plane.