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

[Automotriz_bgn]

Hi, im designing a beacon based on nrf52832, but i have a question about RF section, i´m using 2450AT18B100E chip antenna, and to match it with the nrf52 i'm following the reference circuit from page 546, but about the matching circuit for acoppling the antenna to 50 ohm impedance, i dont know if i must add the matching circuit specified on page 2 of the antenna datasheet as this as this link says (https://devzone.nordicsemi.com/f/nordic-q-a/34746/nrf52832-chip-antenna-guidelines), or put the 2450FM07A0029 pass filter as one of your coworkers explain in this case (https://devzone.nordicsemi.com/f/nordic-q-a/25318/52832-antenna-and-matching-network-chips) or if i need an VNA to obtained antenna´s impedance and design my own PI or T network, so i would thank you if you could clarify me about that.
Kind regards
Automotriz_bgn

[ketiljo]

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

[Automotriz_bgn]

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 

[ketiljo]

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.