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Device with no package?

autodeskguest

Can someone direct me to the manual section that describes how to create

a device with no package?  I am working on an rf design that has a pc

track antenna.  I need to show the antenna on the schematic (connected

to a balun).

--

John Bachman, W1JGB

AnaTek Corporation

 

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  • On 02/11/2010 04:27 PM, John Bachman wrote:

     

    I was thinking of making the footprint out of copper also but could not

    figure out how to do it.  Guess I am missing something (nothing new).

     

    I've had to do similar tasks in the past.  In the package layout, I

    added an SMD pad (or TH pad) to represent the antenna center conductor.

    I then added a copper trace from the pad out to a length and width

    appropriate to the frequency.  Round the end caps as necessary for your

    design.

     

    If you wanted to place an on-board dipole, you can do the same thing for

    the other antenna lead.

     

    You can also position the SMD pad along the copper trace to add some loading

     

    A DRC error will be produced for the area where the SMD pad overlays the

    copper trace.  Once approved, it never bothers you again.

     

    Enjoy,

        - Chuck

     

     

Reply

  • On 02/11/2010 04:27 PM, John Bachman wrote:

     

    I was thinking of making the footprint out of copper also but could not

    figure out how to do it.  Guess I am missing something (nothing new).

     

    I've had to do similar tasks in the past.  In the package layout, I

    added an SMD pad (or TH pad) to represent the antenna center conductor.

    I then added a copper trace from the pad out to a length and width

    appropriate to the frequency.  Round the end caps as necessary for your

    design.

     

    If you wanted to place an on-board dipole, you can do the same thing for

    the other antenna lead.

     

    You can also position the SMD pad along the copper trace to add some loading

     

    A DRC error will be produced for the area where the SMD pad overlays the

    copper trace.  Once approved, it never bothers you again.

     

    Enjoy,

        - Chuck

     

     

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