A new design for the compact single-feed dual-frequency operation of a slot
ted square microstrip antenna is demonstrated. The antenna generates two di
stinct operating frequencies with different polarization planes and broad r
adiation characteristics. The antenna has the added advantage of an antenna
size reduction as large as similar to 61 and 45% in comparison to the stan
dard rectangular patch for the above two frequencies. (C) 2001 John Wiley &
Sons, Inc.