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LMH0340: Antenna impandence with LMH0340

user6544449
Intellectual 795 points
Part Number: LMH0340

Hello Team,

The second screenshot department is an antenna we asks the antenna factory to make a module cable and buckle it to the motherboard,

but I want to confirm with you, can the impedance of this wire be made into 50Ω? at present, the antenna manufacturer can't do 75Ω, only 50Ω, i see that the datasheet is 75Ω, or must the antenna manufacturer make 75Ω?

Thanks!

  • 0
    TI__Guru* 93670 points

    Greetings,

    Yes impedance can be changed to 50-ohm. Please note typically 75-ohm coax is used with LMH0340. To change to 50-phm,  R906, R927, 929, and 932 all should be changed from 75 to 50 ohm. Also, trace impedance to these Resistors should be 50-ohm as well.

    Regards, Nasser