We are designing an IoT board for worldwide cellular coverage, and due to small GND plane we want to apply aperture tuning to the antenna in order to meet performance requirements, especially in the lower bands. With PCB size of only 40x60 mm how would you go about. I can see that for example Lucida SR4L002 has a tuning inductor between GND pad and GND plane.
Our idea in such a case would be to design in a SP4T switch, for example Infineon BGS14PN10 to change between tuning components in order to switch between different tunings for the lower bands. How should we proceed with design and board layout for such an approach?
Or is it other, better ways to achieve this?