Highly broadband circular polarized patch antenna with 3 phase feed structure

In this paper a highly broadband circularly polarized patch antenna design is shown. The design features several novelties which includes the use of a 3-phase feed circular patch for optimal axial ratio and the 3-phase microstrip feed structure to excite the patch antenna. Combining those techniques provides superior bandwidth in both return loss and axial ratio compared to classical rectangular patch designs as shown by simulation and measurements.

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