In the datasheets, 0.975 is stated as the peak forward voltage.A continuous forward current of 2.5 is the maximum consumption of this device.RF diode is necessary to operate the device at a DC reverse voltage below 110.
JANS1N5804 Features
the forward peak voltage is 0.975
JANS1N5804 Applications
There are a lot of Microsemi JANS1N5804 applications of RF diodes.