Abstract
A notch-etched circular patch antenna with dual polarized characteristic is presented in this paper. By loading metamaterial structures under the circular patch with four curved branches, two monopole modes with omnidirectional radiation patterns in the azimutal plane and one patch mode with patch-like radiation pattern in the vertical plane are excited. Despite the circular polarization (CP) realized by the four curved branches, it is obtained by introducing perturbations on the circular radiating patch as well. Besides, linear polarization (LP) for the second monopole mode stays unchangeable. To validate the analysis mentioned above, the antenna is fabricated and measured. The measured results show a good agreement with the simulated ones.
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