Abstract: A V type aperture coupled circular polarization patch antenna constructed with a microstrip line formed on a rear face of a dielectric substance, a ground surface formed on an entire face of the dielectric substance, a V type aperture formed at a desired angle on the basis of a portion of the ground surface, which overlaps with the microstrip line, and a patch formed into a rectangular shape and mounted at an upper portion of the aperture so as to cover the aperture. At 1.9375 GHz, which is one of center frequencies of IMT-2000, the reflection loss is −11.34 dB, the band width at minus 10 dB is 15.2% (295 MHz), the beam width is 60°, and a proper circular polarization may be obtained.