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Original question:

CC1310: Inquiry on reference design for 940MHz based on CC1310 and CC1190

CC1190: Need optimized matching value of PA and LNA for 940MHz~944MHz with LAUNCHPAD_CC1310_CC1190_1_3_0(Evaluation Board)

moons choi
Prodigy 20 points
Part Number: CC1190
Other Parts Discussed in Thread: CC1310

Hello,

I understand that LAUNCHPAD_CC1310_CC1190_1_3_0(Evaluation Board) is optimized for 915MHz operation,

So, after testing your Evaluatin board , RF performace of 940MHz band seems to be poor than that of 915MHz band  

I need to improve RF performance of 940~944MHz frequency band

Can you recommend optimized values of PA in/out and LNA in/out matching ?

Best regards,

Thanks,

     

  • 0
    TI__Guru**** 317180 points

    The Launchpad has a SAW filter with a given bandwidth. Check that your wanted frequency is within the SAW filter BW and if not, remove the SAW filter and test without.

  • 0 in reply to TER
    Prodigy 20 points

    Without saw filter, near field performance(about within 50meters) is ok,

    but far field test, RF performance drops dramatically even though the receiver RSSI is good ( -60dB )

    I suspect unwanted noise entering into RX path. 

    Can you recommend any Band Pass saw filter covering 940~950Mhz frequency?.

    if you can, inform me BPF maker and part number 

    best regards,