Hello!
I set up a project using NRF24L01 and a patch antenna ceramic, the type used in GPS.
In fact, I tested several types of antennas, F, F inverted, GPS, Loop. But none could reach with the radio. A maximum of about 4 meters. tested several values of capacitors and inductors, to solve the problem.
I would like to look the electric scheme and the PCB and help me solve this problem.