I'm designing a 345MHz transmitter using the MAX 7044 ISM transmitter with an electrically small antenna and need to test the matching network. I will connect the VNA in place of the transmitter using a short piece of coax. I also have made calibration standards out of the same coax and length.
How do I set up the circuit to measure the impedance as seen from the transmitter that includes the biasing inductor which is connected to the supply? I assume that because the DC supply and ground both appear as grounds to small signals, I should short the battery terminals (battery removed!) so that currents can flow through the biasing inductor out to the battery and onto ground. Doing this would have the added benefit of taking into account the inductance and resistance of the power supply traces.
Is this the right way to handle this?