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  1. lechko

    Negative real impedance? (HFSS design)

    thanks, that was helpful. i do have a transition from a 0.5mm inner coax to an infintisimal width single turn coil, i'll try to make the transition softer. one more thing... i made the coaxial line deliberately shorter than 1/4 wavelength since it's thin and the high modes are suppressed, i've...
  2. lechko

    Negative real impedance? (HFSS design)

    Thanks for the info, that was helpful. Actually im connecting the coax to the coil just by cutting it and putting the end so that it touches the single turn coil... should this make any problems? By the way, i'm putting a lumped element in the end of the feed just by cutting a gap in it and...
  3. lechko

    Negative real impedance? (HFSS design)

    Hi everyone, im new to this group so i hope you can help me... I've been working with HFSS for a while now, designing RF coils for MRI. The structure is pretty simple - a single turn coil with a coax feed. the feed is blocked by a copper block on its port end, and the inner coax connects to the...
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