I have no expererience with microwave relais. Bought 2 used 18GHz relays. One from Sivers/Philips, draws about 40mA @ 28V
The other one from Microwave Associates (brand seems to be sold regularly on Ebay, but I cannot find any details)
Coil does 160mA @ 28V which is over 4 Watts.
Does anyone knows if this is usual for those kines of relays ?