In-situ gain/phase calibration and characterization of downhole receiver electronics

A method comprising:

• exciting a geological formation with a transmitter antenna contained on a tool body associated with a logging tool;
• acquiring formation measurements with one or more receiver assemblies contained on the tool body;
• generating a reference calibration signal using a signal generator;
• measuring the reference calibration signal using a signal processor;
• calculating a corresponding gain and phase response for each of the one or more receiver assemblies by:
• generating an attenuated calibration signal by attenuating the reference calibration signal based on one or more gain characteristics of the one or more receiver assemblies and one or more corresponding formation measurements;
• injecting the attenuated calibration signal into a receiver antenna contained in the one or more receiver assemblies in order to generate a receiver output signal;
• and
• using the signal processor to calculate the gain and phase response of the one or more receiver assemblies based on the reference calibration signal and the receiver output signal;
• and
• using the signal processor to determine a true formation measurement by correcting each formation measurement based on the gain and phase response of a corresponding receiver assembly used to acquire the formation measurement.