IWR6843ISK: What's the use of these stubs on the microstrip line？

xu qingjie

Part Number: IWR6843ISK

Hi supporter；

I`m curious about those stubs. We tried to simulate antenna with those stubs,and the S11 is not good. If we simulate antenna without those stubs,we will get batter S11.

Is those stubs for matching RF port？ Or other purpose？

thank you

over 4 years ago

0 xu qingjie over 4 years ago

Intellectual 320 points

one more question.

Could you please tell us the frequency and bandwidth of antenna on IWR6843ISK？

thanks for your reply

0 CHETHAN KUMAR Y.B. over 4 years ago in reply to xu qingjie

TI__Mastermind 25835 points

Hello,

These stubs are used for matching the Antenna ports. Bandwidth of Antenna is optimized for 60-64GHz. More details you could find in the below post.

https://e2e.ti.com/support/sensors/f/1023/p/749295/2775143#2775143

Thanks and regareds,

CHETHAN KUMAR Y.B.

0 xu qingjie over 4 years ago in reply to CHETHAN KUMAR Y.B.

Intellectual 320 points

Hi CHETHAN;

Thank you for your response.

One more question,what`s the DK value TI simulated with HFSS？we calculate the DK value with Rogers APP，and R04835LoPro DK under 62GHz is 3.45.Should we use 3.45 or 3.48 to simulate？

thank you

0 CHETHAN KUMAR Y.B. over 4 years ago in reply to xu qingjie

TI__Mastermind 25835 points

Hello xu qingjie,

Thanks for the confirmation, Based on the measurements DK values would be updated periodically at different frequencies.

Please review the updated values from the Raogers calculators, you could refer to below e2e post.

https://e2e.ti.com/support/sensors/f/1023/t/738111

Thanks and regards,

CHETHAN KUMAR Y.B.

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IWR6843ISK: What's the use of these stubs on the microstrip line？