[J. Res. Natl. Inst. Stand. Technol., Volume 107, Number 5, September-October 2002, p. 433]
Erratum: In Eq. (6), the X12 in the final term should instead be X12*. Thus, the correct form of Eq. (6) is
Results in the paper are unchanged. I am grateful to Tom McKay of RF Micro Devices and Larry Wagner of IBM for calling this to my attention.
