Hello,
Is there a way to suppress CMC on a PCB microstrip / CPW ?
Am trying to implement this tap feed attached
Thank you

 

I have seen examples but that is outside my knowledge base by quite a distance. A varying width strip-lines scheme.

 

How many layers do you have on the PCB you are trying to use? The bazooka balun is inherently a transmission line within a transmission line. You might be able to implement it as al lateral structure, conductors using tracks top and bottom connected with stitching vias approximating an I beam.
A great excuse for some time with an EM simulator.
Hope that helps with some ideas.

 

You would need at least a 2 layer PCB and understand how to calculate the inductance, etc. but I've done many what are called Planar Inductors and Transformers on a PCB. In my case, there were ferrite cores attached, but you don't necessarily need to do that. The layout would be a coil type layout and in the inside of the coil, you need a via to exit and route back to the area of the input to the coil. To tap the coil, you would just place a via in the location you want and exit from that location on the back side as the center/inside end of the coil. Its a simple routing process but the space and turns are the parts that need the math side of things. I'm not a big numbers guy so that would be on your end, but if you use FR4 type materials you can figure the Dk will be about 3.8 to 4.2. Good luck and have fun...