IWR6843ISK: Redesign of patch antennas of 6843-ISK

Hello Kai Yang1,

   You could refer to IWR6843ISK-ODS EVM which has single patch wide FOV

https://www.ti.com/tool/IWR6843ISK-ODS  This EVM uses Rogers 3003 material

1) You could find the permittivity and loss tangent of substrate layers from the below Rogers calculator.  This calculator has the material property for all the Rogers material, you could choose to your desired material and desired topology and desired frequency to get the permittivity and loss tangent information. 

 https://www.globalcommhost.com/rogers/acs/techsupporthub/en/calculatorMWI.php

2) You could refer to IWR6843ISK or IWR6843ISK-ODS designs and reference plane for 50Ohm for the RF lines is at the at the edge of the package, after it BGA balls makes transition into PCB. From this 50 Ohm reference plane GCPW transmission lines (50Ohm) are connected to antenna. 

Thanks and regards,

CHETHAN KUMAR Y.B.

Hello Kai,

    Please find the DXF file for the ODS EVM link below.

 /cfs-file/__key/communityserver-discussions-components-files/1023/PROC075C.zip

Thickness of the Rogers (RO4835LOPRO) material in ISK is 4mil and in IWR6843ISK-ODS is RO3003 is 5mil. These informations are present in the Altium design file in the Layout section under respective folders. 

Thanks and regards,

CHETHAN KUMAR YB. 

Hello  Kai,

 Please find the complete stackup for the ISK board and ODS board, which has Board thickness and Antenna layers thickness

ISK board stack-up

ODS Board stack-up

Thanks and regards,

CHETHAN KUMAR Y.B.