CC2652P: CC2652 maximum range distance

Hi albgarc2014,

Are you using SIMPLELINK-CC13XX-CC26XX-SDK v6.30 zc_generic like from your previous E2E thread to perform this test?  Have you set the SysConfig -> Zigbee -> Radio -> Transmit Power to 20 dBm?  I also recommend testing with SmartRF Studio 7 and comparing range performance.  Your PA output design appears to be directly based off of the LAUNCHXL-CC1352P-2, however it would still be a good idea to submit your design to SIMPLELINK-2-4GHZ-DESIGN-REVIEWS for further review.

Regards,
Ryan

Hi Ryan
I am using SIMPLELINK-CC13XX-CC26XX-SDK v4.10 zc_generic.

With v6.3 I have not been able to customize the project to put RF front end on internal differential bias.

I am using 16 dbm, if I increase it it seems that the CC2652 resets.

Any idea?

Thanks

You should be using the latest SDK version, and RF Design settings will be fully configurable after selecting the "Use Custom Board" option.  Make sure that the VDDR is forced from within the Device Configuration.  Make sure that a LAUNCHXL-CC1352P-2 design is referenced.

Regards,
Ryan

Hi Ryan, 

I have the examples projects from the last SDK and I can customize it. But the same result. 

For me it is sure that the problem is with the power amplifier. With 5dbm power (without amplifier) I have even more range than with the amplifier (> 14 dbm). Even if I compare with the Launch Pad range at 5bm, I'm doing very well.

So my problem is with the power amplifier.

For me my problems can be these:

1-) Impedance coupling. However the distance the signal travels is very small so it should not be a problem (see attached pictures).

2-) The angle that the signal tracks travel from the amplifier (see attached pictures). However on the P2 launch pad, there are 2 angles of 90 and it works perfectly on the launch pad.

Do you consider that any of these could be the problem? Or do you think it could be something else? Please check the attached image.

Do you have multiple custom boards to test with, and have you tried performing range tests with SmartRF Studio?  I will loop in a HW expert to further comment on the design.

Regards,
Ryan

Hi Ryan!

Thanks very much.

Yes, I have multiple custom boards. The same for all custom boards.

About SMart RF, no yet. 

Thanks very much for the HW expert.

Testing with SmartRF Studio may help us determine whether it's a custom hardware build or Z-Stack software configuration issue.

Regards,
Ryan

Hi Ryan, Bun Kuch, 

Sincerely thank yuo very much. 

I think that the layauot's pointing out is my problem.
I will come back with some questions and then close the thread.

Thanks very much. 

Best regards

Hi Ryan, Bun Kuch, 

I have redesigned the RF front end according to Bun Kuch's suggestions.  But I have a few points that I would like to confirm if they are correct or no. 

1-) The trace of gnd (before the solid polygon of gnd) shown in picture 1 can be a problem? See picture 1.

2-) Is the area of the solid gnd polygon (25mm x 45mm) OK for the antenna? See pictures 2 and 3.

3-) Is the routing of the RF signals correct? See picture 4.

4-) As the RF traces are short, there should be no problem with impedance coupling, am I right?

Picture 1:

Picture 2:

Picture 3: 

Picture 4:

Sincerely, Thanks very much. 

Please be patient as the SimpleLink hardware experts are on leave until January 3rd.  Formal hardware design reviews can be submitted through SIMPLELINK-2-4GHZ-DESIGN-REVIEWS but will have a similar wait time.  Please provide full schematics and board layout for the most effective review.  You can reference the LAUNCHXL-CC2652P-2 Design Files and SWRA640 to further identify any other reasons for failure.

Regards,
Ryan