A new and simple technique for obtaining circular polarization (CP) ra
diation of a single-Seed microstrip antenna is demonstrated. This CP d
esign is achieved by insetting a single slit to the boundary of the mi
crostrip patch, and placing a single Seed along an axis 45 degrees to
the one containing the slit. Applications of this CP design method to
square and circular microstrip antennas have been implemented. Typical
experimental results are presented and discussed. (C) 1998 John Wiley
& Sons, Inc.