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Two kinds of signal processing techniques for ground penetrating radar (GPR) are applied to measured GPR data in order to improve performance of target identification. One is the method for removing strong ground clutter that covers a weak target response in time domain, and the other is the calibration procedure of GPR response for removing undesirable(More)
Significant advances in the developmcmt of HEMT technology have resulted in high performance cryogenic, 1.,NAs whose noise temperatures arc within an order of magnitude of the quantum noise limit (hv/k). Key to the identification of optimum HEMT structures at cryogenic {temperatures is the clevelopmcnt of on-wafer noise and device parameter extraction(More)