TY  - RPRT
TI  - A variational expression for the scattering matrix of a coaxial line step discontinuity and its application to an over moded coaxial TEM cell 
AU  - Sreenivasiah, I
AU  - Chang, David C
PY  - 1979
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 79-1606
DO  - 10.6028/NBS.IR.79-1606
ER  -