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balanced port

Question asked by codama on Aug 21, 2007
Latest reply on Aug 22, 2007 by codama
I'm trying to simulate a discrete balun according to an application note of an IC-maker (CC2420) by means of using the balanced port implemented in Genesys.
The balanced port impedance of the IC is (60-j164) ohm and should be matched to a 50 ohm (unbalanced) antenna.
By using the given values of the discrete components (for the balun) in combination with the balanced port the scattering parameter look very bad. In contrast they look very good if I adjust the balanced port impedance (of Genesys) to only 'half' of the given unbalanced IC-impedance (Re/2, Im/2).
Can anybody comment on my observation?

Thanks and regards,