I am considering using an ceramic antenna for my RF product design, but I am not sure how to interpret some of these antennas' datasheets which specify a ground plane surface.
For example the datasheet of this ceramic antenna from Johanson which specifies an example board with a a ground plane of a certain size:
Here are some of the questions about this design:
- Do I really need to have all these vias all around my GND plane?
- I have components soldered on top of the ground plane, will it affect the performance?
- This is a 4-layer board with two signal layers, a power plane and a GND plane, does this affect the performance as well?
- Is the 20mm x 40mm ground plane a recommendation, a minimum, or a maximum? If my PCB is bigger and a different overall form, will it still work?