pancho_hideboo wrote on Jul 1st, 2009, 8:23pm:If feed line is short to next stage or antenna, we can accept bad S22, e.g. -3dB.
after the PA, usually, a filter or the antenna is connected with the PA. will the bad S22 deteriorates the characteristic of the filter or the antenna ?
pancho_hideboo wrote on Jul 1st, 2009, 8:23pm:But if feed line is long, you have improve S22 or insert lossy matching pad after your PA.
More importanty rather you have to consider load stablity and load survivablity for your PA.
i know how to see the load stablity circle,but for the load survivablity, how can i simulation in ADS or Cadence?
thank you for your help!!