I'm working my clients LTE IoT application, where using SR4L002 antenna for various bands, but mostly conectrating on EU LTE bands. As I'm doing my first VNA measurments I see the antenna is heavily de-tuned by the display panels vinyl plat, as adding huge dielectric load.
I seen you have antenna matching options in the datasheet but not discussed in details. Do you might have any guidance or application note for such scenarios with dielectric load?
On my VNA measurements you can see the blue trace as "antenn pcb in air" and the yellow trace is where "vinyl loaded". VNA measurement is calibrated and port extension done for SMA pigtail.
Thank you and