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    Question about 12.75 ghz project

    Hi guys , i want to build an LNB circuit , and i want to know some things :
    can the relay pass lnb signal in his switch without any loss ?
    What is the required pcb track thikness for the lnb signal ?
    I wait your answers thanks

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  2. #2
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    Re: Question about 12.75 ghz project

    Hi,

    can the relay pass lnb signal in his switch without any loss ?
    --> Which relay? Manufacturer and type? --> read it´s datasheet.
    General answer: No.

    What is the required pcb track thikness for the lnb signal ?
    I assume you never did a HF PCB. Good luck.
    Thickness or width?
    --> it depends on PCB material, PCB thickness, trace type, expected characteristic impedance...

    Klaus
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  3. #3
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    Re: Question about 12.75 ghz project




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    Re: Question about 12.75 ghz project

    Hi,

    Absolutely not suitable.
    If you don't recognize this by your own, then you'd better choose another project.

    Klaus
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  5. #5
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    Re: Question about 12.75 ghz project

    look dear , i want to build a switch circuit for connecting 2 sat receivers in the dish motor this circuit have 3 F connectors one for the motor and two for the receivers , when turning OFF receiver 1 the motor will automatically switching to receiver 2 .
    Please help me



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    Re: Question about 12.75 ghz project

    Hi,

    So why don't you do an internet search for "RF switch" "RF relay" "RF MUX"...?

    I assume there are ready to buy solutions available.
    You should have at least some basic HF knowledge if you want to build it on your own. I don't recommend this.

    Klaus
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  7. #7
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    Re: Question about 12.75 ghz project

    -LNB Output is not 12.75GHz, the First IF is max. 2150 MHz
    -Switching RF Signals cannot be done with ordinary relays or similar devices.Dedicated RF Relays or Switches should be used.
    -If you don't have sufficient experiences -seems to be- request a help from a RF guy..



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