Patch Antenna Layout for Better Linear Polarization Isolation

The patent introduces asymmetric protrusions at four corners of the square patch antenna, where each protrusion extends in a direction bisecting the corner angle. This asymmetric configuration breaks the symmetry of the conventional square patch, creating different current distribution patterns that improve isolation between orthogonal linearly polarized waves while maintaining manufacturing simplicity

The patent modifies only the local corner regions of the patch antenna by adding protrusions, while keeping the main body structure simple and square. This localized modification approach maintains ease of manufacture for the overall structure while improving polarization isolation through targeted geometric changes at critical locations

The protrusions are designed with asymmetric orientation at each corner, extending along the angle bisector rather than parallel to the patch edges. This asymmetric design improves polarization isolation by creating distinct current paths for orthogonal polarizations while adding minimal structural complexity compared to a conventional square patch

The patch antenna is segmented into four corners with individual protrusions, allowing each corner to contribute independently to polarization isolation. This segmentation approach improves performance through distributed current control while keeping each individual modification simple and manufacturable