Antenna design

[JESUIS]

Hi I am working on pcb design for a long range application with nRF52832. There are lc circuit which is implemented to antenna pins on reference design of nrf52832. I decided to use chip antenna which is from johanson technologys' model number 2450AT45A100E. The company, owner of these antenna suggest to use different lc design to get best results. Should I remove the lc circuit from circuit to add chip antennas' layout application. I am sending pcb circuits screenshots. Also Have you got any suggestion like using amplifier IC to improve antenna design and communication quality.

Thanks a lot..

King Regards.

[Andreas]

Hi,

 

The 1.5 pF and 3.9 nH suggested by the manufacturer should not replace the 0.8pF and 3.9nH suggested by us. Our matching components handle matching the nRF52 to 50 ohms, while filtering harmonics and spurious emissions. The components suggested by Johanson are added for matching the antenna.

Matching the antenna directly to the nRF, i.e. not through 50 ohms, you will not be able to do conducted measurements of output power and harmonics to verify the grade of your design, unless you own an anechoic chamber to measure this radiated.

 

Best regards,

Andreas