Antenna design - Impedance Matching

rtkrtk Pune, IndiaForum Coordinator

Hi everyone, I am designing an antenna. How can I check whether its impedance is matched to 50 Ohms or not ?

Thanks in advance.


  • Hi @rtk - If you want to measure the impedance of an antenna at a specific frequency or at its design frequency you can check the results of the antenna's return loss or S11. If the antenna is matched at this frequency you will see a minimum at this point. You can also look at the Smith Chart to view the input impedance at a specific frequency. In a Smith Chart a perfect 50 ohm match will be at the center of the Smith Chart. If your antenna impedance is not at the value you designed for than a matching network will be necessary.
  • rtkrtk Pune, IndiaForum Coordinator
    Thanks for the reply.
  • cblaircblair Forum Coordinator
    If you are designing antenna in Ansys HFSS you can plot return loss and VSWR.
  • rtkrtk Pune, IndiaForum Coordinator
    Hello-How to design a matching circuit for an antenna then?
  • cblaircblair Forum Coordinator

    If you are using Ansys HFSS to design an antenna, you can always perform a Co-simulation with HFSS and HFSS circuit.

    There is a Smith tool that will allow you to designs a matching circuit required for an antenna. 

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