MMWCAS-RF-EVM: 20GHz cascading synchronization signals length

Zhenhua Yue

Intellectual 295 points

Part Number: MMWCAS-RF-EVM

Tool/software:

Dear sir,

AWR1 pin B15 to AWR1&2 pin B1, length is 5888.927mils.

AWR1 pin D1 to AWR3&4 pin B1, length is 6100.445mils.

Why are they not equal in length? How to ensure 20GHz synchronization?

2 months ago

0 Aydin Kiasat 2 months ago

TI__Expert 5331 points

Hi Zhenhua,

The length mismatch is expected because the synchronization signals are routed through different Wilkinson splitter paths on the board. To ensure the 20GHz synch, the phase alignment (not just the length) is critical and that is handled through simulation and tuning of the splitter ensuring the overall delay mismatch is within the acceptable phase error margin at 20GHz. Here is a similar thread with another customer you might find it useful. AWR2243: Wilkinson Divider for Cascading Radar - Sensors forum - Sensors - TI E2E support forums

Regards,

Aydin

0 Zhenhua Yue 2 months ago in reply to Aydin Kiasat

Intellectual 295 points

Thank you for reply.

0 Aydin Kiasat 2 months ago in reply to Zhenhua Yue

TI__Expert 5331 points

You're welcome.

Regards,

Aydin