BROADBAND APERTURE-COUPLED CIRCULARLY POLARIZED MICROSTRIP ANTENNA FED BY A THREE-STUB HYBRID COUPLER

摘要

A novel aperture-coupled circularly polarized microstrip antenna with a three-stub hybrid coupler feed circuit in order to generate broadband circular polarization radiation is proposed. The bandwidth is 32.3% for 2:1 VSWR and 42.6% for 3-dB axial ratio. The achievable maximum gain is 8.8 dBic.