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Oct 21, 2021
09:39 PM
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Oct 21, 2021
09:39 PM
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.
Solved! Go to Solution.
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PSoC 4 MCU
1 Solution
Oct 25, 2021
04:24 AM
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Oct 25, 2021
04:24 AM
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
2 Replies
Oct 22, 2021
12:28 AM
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Oct 22, 2021
12:28 AM
MCU : CY8C4247FNI-BL493
ANT : ALA321C3
BLE : BT-33
Oct 25, 2021
04:24 AM
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Oct 25, 2021
04:24 AM
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