Here we choose which type of microstrip coupler is to be designed or analysed.
Enter the dimension to find out how good-bad your coupler is. Add a substrate from the catalog for analysis or design.
Tell me what coupler you want and I will try to find something that might do. Though practical, manufacturable is not by any means always possible.
Single section edge couplers tend to be narrow band due the different mode propagating through the coupled lines. There are many methods for equalising the modes. Additional bridge capacitors ( either lumped or interdigital), wriggle lines or interdigitated lines. however you will never get as good as a stripline.