What can cause an excessively high VSWR (Voltage Standing Wave Ratio) in a WLAN RF
transmission line?

A.
An impedance mismatch in the RF cables and connectors
B.
Reflected direct current (DC) voltage on the main RF signal line
C.
Attenuation of the RF signal as it travels along the main signal path
D.
Crosstalk (inductance) between adjacent RF conductors