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AIROC™ Bluetooth

ymji
New Contributor
Hello
Please inquire about the psoc4 antenna.
The picture below is the Bluetooth frequency measured by our spectrum analysis.
Only 2.4ghz should come out, but 4.8ghz keeps coming out together.
I'm currently working on calculating a low-pass filter, but it's not easy to catch.
Even if it cannot be completely eliminated, I would like to lower the dbm to -55~60, but I would appreciate your comments.
Please refer to the picture below to show the various methods.
thank you.

 

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1 Solution
AnjanaM_61
Moderator
Moderator

Hello @ymji 

Can you try modifying the matching network in  schematics as follows L3=open, C3=1.8nH, C4=0.2pF?

This is the one we use in our CYBLE modules. 

If this also does not meet the expectation, we can add more stages to the filter.

Regards,

Anjana

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2 Replies
ymji
New Contributor

MCU : CY8C4247FNI-BL493

ANT : ALA321C3

BLE : BT-33

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AnjanaM_61
Moderator
Moderator

Hello @ymji 

Can you try modifying the matching network in  schematics as follows L3=open, C3=1.8nH, C4=0.2pF?

This is the one we use in our CYBLE modules. 

If this also does not meet the expectation, we can add more stages to the filter.

Regards,

Anjana

View solution in original post

0 Likes