Title :
A Time-Domain system for EMI measurements above 1 GHz with high sensitivity
Author :
Hoffmann, Christian ; Russer, Peter
Author_Institution :
Lehrstuhl fur Hochfrequenztech., Tech. Univ. Munchen, Munich, Germany
Abstract :
In this work, a broadband Time-Domain EMI Measurement System with high sensitivity for measurements from 9 kHz to 18 GHz is presented. Combining ultra-fast analog-to-digital-conversion and real-time digital signal processing on a field-programmable-gate-array (FPGA) with ultra-broadband multi-stage down-conversion, scan times can be reduced by several orders of magnitude in comparison to a traditional heterodyne EMI Receiver. The system´s ultra-low noise figure of 6-8 dB over the complete frequency range allows for broadband measurements with highest sensitivity of EMI near the noisefloor up to 18 GHz. The time-behaviour of non-stationary EMI can be evaluated via the real-time Spectrogram.
Keywords :
analogue-digital conversion; electromagnetic interference; field programmable gate arrays; microwave measurement; EMI receiver; broadband measurement; electromagnetic interference; field programmable gate array; frequency 9 kHz to 18 GHz; real-time spectrogram; time-domain EMI measurement system; ultra-fast analog-to-digital-conversion; Antenna measurements; Broadband communication; Electromagnetic interference; Frequency measurement; Microwave measurements; Noise; Time domain analysis;
Conference_Titel :
Microwave Conference (GeMIC), 2011 German
Conference_Location :
Darmstadt
Print_ISBN :
978-1-4244-9225-1
Electronic_ISBN :
978-3-9812668-3-2