This document mainly describes how to use NanoNVA tool to do antenna tuning on OM29263ADK with CLEV663B/PN5180B board.
Please refer to the application note AN12810(https://www.nxp.com/docs/en/application-note/AN12810.pdf) about the NanoVNA tool. And please refer the user manual UM11098 (https://www.nxp.com/docs/en/user-guide/UM11098.pdf) about OM29263ADK.
After setting NanoVNA tool with reference to the above documents. Firstly, take the small antenna of OM29263ADK with CLEV663B as an example. The small antenna can be directly connected and used on the CLEV6630B。the antenna board can be directly connected to the CLEV6630B without any additional modification, after the original antenna had been removed (cut off).
The result of the antenna tuning with NanoVNA tool as the below:
Second, take the small antenna of OM29263ADK with PN5180B board as an example. Follow the UM11098 steps as the below:
(a) the EMC filter cut off frequency must be adjusted, and (b) the DPC and related features should be disabled, since the antenna is asymmetrically tuned and the DPC is not used.
(a) The original antenna uses a symmetrical tuning, which uses an EMC filter with L0
= 470nH and C0 = 253pF (220pF + 33pF). The inductor as well as the first part of the
capacitance (220pF) are assembled on the main board. To operate the OM29263ADK
antenna, the C0 (220pF) on the PNEV5180B must be replaced by a 68pF.
(b) The DPC and its related features should be disabled to operate an asymmetrical
antenna.
If can’t get the card information please refer to the AN11740’s related steps to achieve a good sensitivity of RxP/RxN path.
The result of the antenna tuning with NanoVNA tool as the below:
The whole process of the small antennas tuning of OM29263ADK with CLEV66B/PN5180 with NanoVNA is completed.
PS: It is the similar with the steps for the large antennas tuning of OM29263ADK with CLEV66B/PN5180 with NanoVNA.
