Figure 4
The effect of environmental factor on measured data. (a) The variation in S21 and temperature for a 20 dB attenuator recorded over a two days period. (b) The effects of vibration (movement) on the S21 through a 3-1-3 tank using phase-stable cables. The curves have been offset from the original values in the S21 axes to better illustrate the errors introduced. Steady state 1 and 2 means measurement before and after vibration.
