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Need help filtering 2nd and 3rd harmonics on MKW21D512VHA5

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Need help filtering 2nd and 3rd harmonics on MKW21D512VHA5

‎08-02-2016 02:45 PM
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Contributor IV

Hello, A customer of ours is using the MKW21D512VHA5 with a Texas Instruments CC2591 Power Amplifier. They have tried using the harmonic trap shown the reference design.  It definitely helped when transmitting but it adversely affected the receiving capability. Any thoughts on what to try to improve suppressing these harmonics?

Thanks!

Mark

Texas Instruments CC2591

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‎08-02-2016 06:15 PM
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jasonchiang
NXP Employee
NXP Employee

Do you have a chance to use MKW2xD EVB and CC2591 EVB to compare the 2nd and 3rd harmonics level between EVBs and customer PCB ? From my past experience, layout with good isolcation is also important.

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