matching circuit for 2450AT18B100E chip antenna on a device based on nrf52832 chip

RE: matching circuit for 2450AT18B100E chip antenna on a device based on nrf52832 chip

ketiljo — Thu, 11 Apr 2019 11:11:56 GMT

To measure the impedance of the antenna and to find the correct component values for the antenna tuning, you need a VNA. The filter doesn't change this.

It might be easier to use a 1/4 wave PCB track as this can be trimmed to the length that gives you maximum range.

RE: matching circuit for 2450AT18B100E chip antenna on a device based on nrf52832 chip

Automotriz_bgn — Tue, 09 Apr 2019 16:28:29 GMT

i have already read the whole document, and according to that i need a VNA to determine antenna´s impedance and design a matching circuit according to the complex value of the impedance, but i dont have a VNA, so i want to know if i can opt for some solutions above

RE: matching circuit for 2450AT18B100E chip antenna on a device based on nrf52832 chip

ketiljo — Tue, 09 Apr 2019 10:27:36 GMT

Any antenna tuning components comes in addition to the matching network (C3 / L1 ) of the nRF52832. For a chip antenna, use a T or pi match. See this whitepaper for more about this process: www.nordicsemi.com/.../nwp_017.pdf