Dynamic multi-mode radiometer system with quantized noise injection for automated calibration and method of automated calibration

摘要

Embodiments are directed to a dynamic multi-mode radiometer system and method for automated calibration of the system. In an embodiment, the system comprises a radiometer channel including an input selective low noise amplifier (LNA) and radiometer receiver. The LNA comprises a first input and second input and an output coupled to the radiometer receiver. The system includes an antenna coupled to the first input and a reference load selectively connected to the second input, the reference load configured to produce a first signal representative of a reference temperature. The system includes an internal calibrated noise generator selectively connected to the second input of the LNA and includes an internal noise source for producing a second signal representative of an injected noise temperature. The generator is configured to calibrate the radiometer receiver as a function of the injected noise temperature equalized to the reference temperature.

主权项

1. A system comprising:
a radiometer channel including an input selective low noise amplifier (LNA) and a radiometer receiver, the LNA comprising a first input and a second input and an output coupled to the radiometer receiver; an antenna coupled to the first input of the LNA; a reference load coupled to the second input of the LNA and configured to produce a first signal representative of a reference temperature; and an internal calibrated noise (ICN) generator selectively connected to the second input of the LNA and having an internal noise source for producing a second signal representative of an injected noise temperature, the ICN generator being configured to calibrate the radiometer receiver as a function of the injected noise temperature equalized to the reference temperature.