The estimated phase shift values of the
device’s raw analog phase shifter at any temperature (Tpresent)
can be derived as:
Equation 7. Estimated Phase
Shift ArrayTXm (0 to 63) = Factory Measured Phase Shift Array
CornerReflector,TXm (0 to 63) + Temperature Correction LUT
(Tpresent)
Here, Factory Measured Phase Shift
Array
x denotes the measured phase shift values for each of the 64 raw
analog’s phase shifter settings obtained at factory for each TX, at the factory
temperature (T
factory=25C), and comes from Equation 1 or Equation 2. Further,
Temperature Correction LUT (T
present) denotes the temperature-related
correction that must be applied to obtain the equivalent estimated phase shift values
for T
present. It is explained in the following sections.