According to the datasheets, the peak forward voltage is 1.1 volts.RF diode consumes approximately 1 in continuous forward current at any given moment.For operation, a DC reverse voltage less than 1000 must be applied.
S1M-E3/11T Features
the forward peak voltage is 1.1
S1M-E3/11T Applications
There are a lot of Vishay S1M-E3/11T applications of RF diodes.