I have a non-functioning transmitter for a radar I've built. When I was checking for shorts using a multimeter, I noticed that the resistance measurements between RFin and GND and RFout and GND of my power amplifier (SE5004L) were practically 0 (about 0.8ohm). The datasheet specifies that these ports are matched to 50ohm. I thought I might have damaged the device during soldering so I performed the same measurement on a brand new SE5004L and got the same result. Moreover there is no short between the voltage supply pin and GND (confirmed when hooked up to 5V as well). Am I faced with two bad chips, or is the measurement I'm performing flawed, or does this result somehow make sense?
If the chips are bad, how do I prevent this sort of thing (especially considering one of the chips is fresh out of the packaging)?