Other Parts Discussed in Thread: IWR6843
The IWR6843ISK-ODS mmWave EVM PCB design specifies the following 50 Ohm antenna trace width/space:
- Microstrip: 12 mil width.
- CPW guide: 11.625 mils width and 9 mils spacing.
Do these trace width and spacing have to be exact as in the reference design if we are to use RO3003 RF core material? The PCB board house we are working with came back with different trace widths in order to achieve 50 Ohms (see modeled line widths shown in red below).
It is critical to have matching 50 Ohms traces, however are the antenna microstrip and CPW guide trace widths not as critical as long as 50 Ohms is achieved?
The new trace widths proposed by the board house to meet 50 Ohms are:
- Microstrip: 11.40 mils
- CPW guide: 10.80 mils
Proposed PCB stack-up
Thank you for all the help.
Christian.