Compact circularly polarized triangular microstrip antenna with y-shaped slot

A novel compact circular polarization (CP) design of a single-feed equilate ral-triangular microstrip antenna with a Y-shaped slot is presented. The Y- shaped slot is cut in the patch with its upper two arms facing either the t riangle tip or the bottom side of the triangular patch. Results show that, with a proper size of the Y-shaped slot, the present proposed design can ha ve an antenna size reduction up to about 19% for operating at a given frequ ency far circular polarization, as compared to the regular-size circularly polarized triangular microstrip antenna. The proposed antenna design is des cribed and studied. (C) 1999 John Wiley & Sons, Inc.