A microstrip coupler is provided for optimizing directivity by improving alignment of even and odd mode phase components. In one form, the microstrip coupler comprises a linear main line with a coupling line adjacent the main line. The coupling line has a non-linear configuration along a side facing the linear main line. By one approach, the non-linear configuration comprises a plurality of rectangular-shaped projections spaced along the coupling line and extending toward the main line. The rectangular-shaped projections are substantially continuously disposed along the coupling line and may be equally or variably spaced along the coupling line. The rectangular-shaped projections may also be uniform or non-uniform in size, such as, for example, by having varying height and width configurations.