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  1. #1
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    HFSS antenna imput impedance

    I need simulate an antenna in HFSS for RFID. The internal impedance of IC at 915MHz is 12.8-j248 (NXP UCODE7). This is a serie impedance.

    To simulate this impedance I use a Lumped port with equivalent parallel resistance Rp ~ 4.837K and a capacitance of 0.7pF in parallel using a lumped RLC. Both in parallel connected to a dipole input.

    Antenna needs be 12.8+j248 impedance for perfect match.

    My question:

    When I measure Z11 in HFSS, the real and imaginary part showed is parallel or serie modeled?

    My doubt is because real part depends of the configuration.

    •   Alt21st December 2016, 12:15

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  2. #2
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    Re: HFSS antenna imput impedance

    If there's only one port, then Z11 is the input impedance of your entire network, as seen from that port.



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