HP 54753A User Manual page 260

Transmission Line Theory Applied to Digital Systems
Microstrip Transmission Line Techniques Evaluated Using TDR Measurements
Previously it was found that the 50 Ω resistor was inductive. The lower values
of resistors (< 75 Ω) exhibit inductance, while the higher values behave
capacitively. No mismatch appears due to the crosstalk between the two
100 Ω branches, because of their wide separation.
Figure 11-16
Hybrid Divider
11-32