Directional Borehole Radar Calibration

An innovative low-noise directional borehole radar system is being developed. Harsh and changing operating environments are challenging for sensitive low-noise electronics. A system with such high sensitivity is also susceptible to temperature changes and component-parameter variations. Therefore, a calibration module was developed to calibrate the overall measurement system with a test-signal generator. This calibration includes channel matching for accurate direction detection and sampling-clock correction. After a brief introduction, testing and calibration methods are introduced, followed by measurement results and figures showing the practical results achieved so far.