TY  - RPRT
TI  - Approximate formulas for the far fields and gain of open-ended rectangular waveguide 
AU  - Yaghjian, Arthur D
PY  - 1983
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 83-1689
DO  - 10.6028/NBS.IR.83-1689
ER  -